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TESTD100 Release 2017-05-26
Send your 1.b4 games to me, please. Thank you! /Marek
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(c) Marek Trokenheim

1.b4 d5 2.Bb2 Nf6

(...)

3.a3 b5 4.e3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b5).

3.a3 Qd6 4.Nf3 Nbd7 5.e3 e5 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 Nd7 5.e3 Ngf6).

3.a3 e5 (--> 1.b4 e5 2.a3 d5 3.Bb2 Nf6).

3.a3 Bf5 4.e3 e6 5.Nf3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

3.Na3 e6 4.c3 c5 5.Qc2 (5.Nc2!?+=) 5...cb4–/+ 6.cb4 Bb4 7.Nb5 0–0?? (better is 7...Nc6–/+) 8.0–0–0?? (better is 8.Nc7 Nc6 9.Na8+=) 8...a6 9.Bf6 (9.Bc3 Be7 10.Bf6 Bf6–+ (worse is 10...gf6 11.Nc3–+)) 9…Qf6 (9...Qf6 10.Nc3 Qf2–+; 9...gf6?! 10.Nc3–+) 0–1. otseli – ilki (1725), gameknot.com, 2013.

3.a4 e5 4.Be5 Nc6 5.Bb2 Nb4 6.Nf3=+.

3.a4 Bf5 4.d3 e6 5.b5 c6 6.c4 (6.Nf3 Bb4 7.Nbd2 0–0=+) 6...Bb4 7.Bc3 Qa5 8.Bb4 Qb4 9.Qd2 Qd2 (9...a5 10.Qb4 ab4 11.Nd2–/+) 10.Nd2 0–0 11.Ngf3 Nbd7 12.Nh4 Bg6 13.Ng6 hg6 14.e3 Rfc8 15.d4 c5 16.cd5 Nd5 17.dc5 Nc5 18.Bc4 (18.a5 Rc7=) 18...Nb4 (18...Nb6!? 19.Ke2 Nca4=+) 19.0–0 (19.Ke2 a5+=) 19...a5 20.Rfc1 b6 21.Nb3 Nb3 22.Bb3 (22…Rd8 23.h3+=) 1–0. b4_player (1880) – stoffl (1985), GameColony.com, 2002.

3.a4 Bg4 4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.a4).

3.b5 Nc6 4.bc6 e5?! (4...bc6 5.Nf3 e6+–) 5.cb7 Bb7 6.Be5 Bc5 (6...Bd6 7.Bd6 Qd6 8.e3+–) 7.d4 Bb4 8.c3 0–0 (8...Bd6+–) 9.cb4 Re8 (9...Nd7 10.Bf4+–) 10.e3 Ne4 (10...Nd7 11.Bf4+–) 11.Nd2 Nf2 (11...a5 12.b5 c5 13.bc6 Bc6 14.Rc1+–) 12.Kf2 Qh4 13.Bg3 Qf6 14.Qf3 Re3 15.Qf6 Rae8 16.Qf5 g6 17.Qf4 c6 18.Qe3 Re3 19.Ke3 a6 20.h4 f5 21.Ngf3 h6 22.Nb3 g5 23.hg5 hg5 24.Ng5 Kg7 25.Nc5 Bc8 26.Be5 1–0. lokia – twandio, net–chess.com, 2004.

3.b5 e5 4.e3 Bd7 (better is 4...Bd6!?+=) 5.Be5+= a6 6.a4 ab5 (6...Be7 7.Nf3+=) 7.ab5+/– Qe7?? (better is 7...Ra1 8.Ba1 Bf5+=) 8.Ra8+– (8.Ra8 Qe5 9.Rb8 Ke7 10.Rb7+–) 1–0. Janek – Gustave, internet, 2016.

3.b5 Ng4 4.e3= e5 (4...Nf6 5.Nf3+=) 5.h3 Nf6 6.Be5 Be6 7.Nf3 Nbd7 8.Bb2 Bd6 9.Be2 Rg8 (9...0–0!?+=) 10.Nd4 Ne5 11.f4 Ne4? (better is 11...Nc4!? 12.Bc4 dc4 13.Ne6 fe6+–) 12.0–0 (12.fe5?? Qh4 13.g3 Qg3 14.Kf1 Qf2; 12.Ne6?? Qh4 13.g3 Qg3 14.Kf1 Qf2) 12...Nc4 13.Ne6 fe6 14.Bc4 dc4 15.Qh5 Kd7 (15...Kf8 16.f5 e5 17.Qg4+–) 16.Qh7 (16.Qf3!? Nc5+–) 16...Ng3 17.Rf3 (17.Rf2 Nf5 18.Qh5 a6+–) 17...Nf5 18.g4 Nh4 (better is 18...Qh4 19.Qh4 Nh4+–) 19.Rf2 Qe7 20.Nc3 (20.Qe4 Kc8+–) 20...Rae8 (20...g5 21.Qe7 Be7 22.fg5 Rg5 23.Rf7+–) 21.Ne4 Qf8 (21...Ref8+–) 22.Nf6 (22.Nf6 Kc8 23.Ng8 (23.Qh4?! Be7+–) 23...Qg8 24.Qh4+–) 1–0. Taulien,Hans_Juergen (2350) – Hoeffer,David (1995), remoteschach.de, 2002.

3.Nc3 c6 4.g3 Bf5 5.h3 h6 6.g4 Bh7 7.f3 Nbd7 8.f4 e6 9.a3 Be7 10.d4 0–0 11.h4?? (better is 11.e3–/+) 11...Ng4–+ 12.Bc1 (12.Qc1–+) 12...Bh4 13.Rh4 Qh4 14.Kd2 Nb6 15.Nf3 (15.Nd5 Nc4 16.Kc3–+) 15…Nc4 0–1. kevtheman – minstrel, gameknot.com, 2008. (=1.Nc3 d5 2.b4 Nf6 3.Bb2 c6)

3.Nc3 e6 4.a4 Bb4 5.Ba3 (5.Rb1 0–0–/+) 5...Bc3 6.dc3 Nbd7 7.e3 c5 8.c4 Qa5 9.Qd2 Qd2 10.Kd2 0–0 11.Nf3 Ne4 12.Kc1? (better is 12.Ke1=+) 12...Nf2–+ 13.Rg1 Ne4 14.Bd3 Nef6 15.e4?? (15.a5 e5 16.Bf5 dc4–+) 15...d4 (better is 15...de4 16.Bb2 Re8–+) 16.e5 Ng4 17.h3 Nh6 (17...Ne3 18.Kd2 f6 19.ef6 Rf6 20.Ke2–+) 18.g4 f6 (better is 18...f5 19.ef6 Rf6–/+) 19.Nd4? (19.g5 fg5 20.Ng5 Ne5 21.Bh7 Kh8 22.Bc5 Rd8=+) 19...Ne5 (better is 19...cd4!? 20.Bf8 Kf8 21.ef6 Nc5–+ (21...Nf6?! 22.g5=+)) 20.Nb5 Nd3 21.cd3 Bd7 (better is 21...b6–/+) 22.Bc5= Rfd8 23.Nc7 Rac8 24.Bd6?? (better is 24.Be7+=) 24...Ba4! 25.c5 (25.Ra4 Rd6) 25...Bc6 26.d4 (26.g5 Nf5 27.gf6 Rd7=+) 26...a6 (better is 26...Nf7!? 27.Ne6 Re8–/+ (27...Nd6?! 28.Nd8 Rd8 29.cd6=)) 27.Ne6= Rd7 28.Nc7? (better is 28.Kb2=) 28...Nf7–+ 29.d5 Nd6 (29...Rdc7?! 30.Bc7 Bd5 31.Bb6=+; 29...Rcc7?! 30.Bc7 Rd5 31.Bb6=+) 30.cd6 Rd6 31.dc6 Rc7 32.Kb2 Rcc6 33.Rac1 Rc1 34.Rc1 Rc6 35.Rd1 Kf7 36.Rd7 Kg6 37.Rb7 h6 38.h4 (38.Ra7 Re6–+) 38...Re6 (better is 38...Rc4!? 39.h5 Kh7 40.Rb6–+) 39.h5 Kg5 40.Rg7 Kh4 41.Rg6 Re4 (better is 41...Re2 42.Kb3 Rf2–/+) 42.Rh6 Rg4 43.Rf6 Kh5 44.Ra6 Kh4 45.Kc3 Kg3 46.Rf6 Kh4 47.Rh6 Kg3 48.Rh8 Kf4 49.Rf8 Kg3 50.Re8 Kh4 51.Re7 (51...Kg5 52.Re5 Kf4 53.Re8=) =. genijalac – maxmaxmax, Live Game Caissa's Web, 2004.

3.Nc3 g6 4.d4 Bg7 5.Nb5 0–0 6.g4? (better is 6.Nf3!?=+) 6…Bg4–+ 0–1. steveiefootball – jlsdonaghey (1780), net–chess.com, 2002.

3.c4 b6 4.e3 Bb7 5.d4 (5.Bf6 ef6 6.cd5 Qd5=) 5...dc4=+ 6.Nf3 b5 7.a4 (7.Nc3 c6–/+) 7...a6 8.Nc3 (8.ab5 ab5 9.Ra8 Ba8–/+) 8...c6–/+ 9.Be2 e6 10.0–0 (10.Na2 Bd6–/+) 10...Bb4–+ 11.Ne5 (11.Qc2 0–0–+) 11...Nbd7 12.Qc2 0–0 13.Bf3 Ne5 14.de5 Nd5 15.ab5 ab5 16.Rfd1 (16.Ra8 Ba8 17.Rb1 Qe7–+) 16...Bc3 (16...Qg5 17.Rdb1–+) 17.Bc3 Ra1 (17...c5 18.Rab1 b4 19.Bb2–+) 18.Ba1 c5 0–1. wlittle (2125) – petrpolacek (1835), net–chess.com, 2004.

3.c4 dc4 4.e3 Qd6 5.a3 e5 6.Bc4 Be6 7.Be2 Nbd7 (7...Bd5 8.Nf3 e4 9.Nd4=) 8.Nf3 0–0–0 (8...a5 9.Nc3 e4 10.Nd4=) 9.Ng5 (9.Nc3 c6+=) 9...h6 (9...Bd5 10.Nc3 Bg2 11.Rg1=) 10.Ne6+= Qe6 11.Qa4 Kb8 12.b5 (12.0–0 Bd6=) 12...Nb6 13.Qc2 g5 (13...Bd6 14.e4=) 14.a4 (14.0–0 Nfd5+=) 14...Nfd5 (better is 14...Nbd5!?=) 15.a5+/– Nb4 16.Qc3 N6d5 17.Qb3?? (17.Qc1 Bd6+=) 17...Bc5 (17...Ne3 18.Qe3 Nc2 19.Kf1 Ne3 20.fe3–+) 18.b6?? (18.Qc4 Bd6+/–) 18...cb6 (18...Ne3 19.bc7 Kc7 20.Be5 Qe5 21.fe3 Qa1 22.0–0–+) 19.ab6?? (19.0–0 Rhe8+=) 19...a6?? (better is 19...Ne3 20.Be5 Qe5 21.ba7 Ka8 22.fe3 Qa1–+) 20.Nc3?? (20.0–0 Rhe8 21.Na3 Qb6+–) 20...Bb6 (better is 20...Ne3 21.Qb4 Ng2 22.Kf1 Bb4–+) 21.Nd5 Nd5 22.Ba6?? ba6–/+ 23.0–0 Ka7 24.d4 ed4 25.Bd4? Nc7?? 26.Bb6 Qb6 27.Qf7 Rhf8 28.Qe7 Rde8 29.Qd7 Rd8 30.Qg7 Rg8 31.Qe7 Rde8 32.Qa3 h5 33.Rfb1 Qc6?? 34.Rc1+– Qd6?? 35.Qd6 Rg7 36.Qf6 (36…Rg6 37.Qg6 Re6 38.Rc7 Kb8 39.Qe6 Kc7 40.Rc1 Kb7 41.Qc6 Ka7 42.Rb1 g4 43.Qb7#; 36.Rc7 Ka8 37.Qa6 Kb8 38.Qb6#) 1–0. FrutiniMalini – BANZAI, Caissa's Web, 2004.

3.c4 c6 4.cd5 cd5 (--> 1.b4 c6 2.c4 d5 3.cd5 cd5 4.Bb2 Nf6).

3.d3 b5 4.Bf6 (4.a4 ba4 5.Nf3 Bd7=) 4...gf6 (4...ef6 5.Qd2–/+) 5.Nd2 (5.a4 ba4 6.e3 Bd7=) 5...Bg7 (5...e5 6.c3=+) 6.c3 (6.d4 a5=) 6...e5 (6...a5 7.ba5 c5 8.Rb1 Qa5 9.Qb3=+) 7.a4= Bd7 (7...ba4 8.Qa4 Bd7 9.Qb3=) 8.ab5+= Bb5 9.c4 (9.e3 Qd6+=) 9...dc4= 10.dc4 (< 10.Nc4 Nc6=+) 10...Bd7 11.e4 Bc6 (11...Bf8 12.c5=) 12.b5+= Bd7 (12...Bb7 13.c5+=) 13.Nb3 (13.c5 Bf8 14.Qc2 Be6+=) 13...c6 (13...Bf8 14.c5=) 14.Nf3 (14.Nc5 Qc7+=) 14...Be6 (14...f5 15.Nc5=) 15.Nfd2 (15.Nc5 Qd1 16.Kd1 cb5 17.cb5 Nd7 18.Ne6 fe6+/–) 15...cb5 (15...Qe7 16.c5 0–0 17.Qf3+=) 16.cb5+/– a6 (16...Qd6!?+/–) 17.ba6 Bb3 (17...Qb6!?+/–) 18.Qb3 (18.Bb5 Ke7 19.Qb3 Qd6+–) 18...0–0 19.a7 (better is 19.Qd5!? Ra7 20.Qd8 Rd8 21.Nb3+–) 19...Nc6+/– 20.Qb7 Qc8 21.Qc8 Rfc8+= 22.Bc4 Nd4 23.0–0 Rc7 24.Bd5 Raa7= 25.Ra7 Ra7 26.g3 Bh6 27.Nc4+= f5 28.Ne5 Bg7 29.Nd3 Ne2 30.Kg2+/– fe4 31.Be4 Re7 32.Bf3 Nd4 33.Rb1 h6 34.Rb8 Kh7 35.Bh5 Nc6 36.Nf4?? Nb8–+ 37.Nd5 Rd7 38.Nf4 Nc6 39.Bg4 Rd2 40.Nh3 Bd4 41.Bf5 Kg7 42.Be4 Ne5 43.Bf5 Kf6 44.g4 Nd3 45.Bd3 ½–½. 73DADDELDU37 – Master1, mySchach.de, 2005.

3.d3 b6 4.Nf3 Bb7 5.a3 c5 6.bc5 bc5 7.Nbd2 d4 8.c3 Nc6 9.cd4 Nd4 10.Nd4 cd4 11.Qa4 Nd7 12.Bd4 e5 13.Be5 Be7 (13...Rc8+–) 14.Bg7 Rg8 15.Bc3 Kf8 16.Qf4 Bg2 (16...Ke8+–) 17.Rg1 Bf1 (17...Qc8 18.Ne4 Be4 19.Qh6 Ke8 20.Rg8 Nf8+–) 18.Qh6 (18.Qh6 Rg7 19.Rg7+–; 18.Rf1?! Rg6+–) 1–0. Fritz 11 – mgrowe, internet, 2013.

3.d3 Nc6 4.b5 Bf5?? (better is 4...Nb8=) 5.bc6+– bc6 1–0. Del Val,Josefa (1795) – Colombani,Camillo, Lugano op, 2008.

3.d3 Nbd7 4.Nf3 g6 (4...e5!? 5.a3 a5+=) 5.e3 Bg7 6.Be2 0–0 7.0–0 Re8 8.Nbd2 e5 9.e4 de4 10.de4 b6 11.Bd3 Bb7 12.Re1 a5 13.a3 ab4 14.ab4 Qc8 15.Nc4 Now all is on e5 15...Nh5 16.g3 b5 17.Na5 c6 18.c4 bc4 19.Nc4 Bf6? (better is 19...Qc7+=) 20.Nd6+– Qc7 21.Ne8 Re8 22.Bc3 c5 23.Qb3 cb4 24.Bb4 Rc8 25.Ba5 Qd6?? (better is 25...Nc5 26.Bc7 Nb3+–) 26.Qb7 Rf8 27.Qd5 (better is 27.Bb5!? Nc5 28.Qc7 Qc7 29.Bc7 Nb3+–) 27...Qd5 28.ed5 Nc5 (28...e4 29.Be4 Ba1 30.Ra1+–) 29.Be4 Nb3 30.Ra3 Nc5 (30...Na5 31.Ra5 Bd8 32.Ra4+–) 31.Bb4 Rc8 32.Rc3 Be7 33.Rec1 Nf6 34.Nd2 Nfd7 35.Nb3 Nf6 36.f3 Nfd7 37.Bc5 Nc5 38.Nc5 Bc5 (38...f5 39.Bd3 Rc7+–) 39.Rc5 Rc5 40.Rc5 (40.Rc5 Kg7 41.d6 Kf6 42.Rd5 h6 43.d7 Ke7 44.d8Q Ke6 45.Qd6 mate) 1–0. Sapareva,Magdalena (1685) – Grabcheva,Natalia, 1st Dimitar Nikolov Mem, 2011.

3.d4 a6 4.e3 Nc6 5.b5 ab5 6.Bb5 Bd7 7.c4 e6 8.c5 e5 9.de5 Ne4 (9...Ne5 10.a4 Nc6 11.Nc3+=) 10.Nc3 Nc3 (10...Qh4 11.Qc2 Nb4 12.Qe2 Nf2 13.Nf3 Nbd3 14.Kf1+=) 11.Bc3+= Bc5 12.Nf3 (12.Qd5 Qe7+=) 12...Bg4 (12...Ra3 13.Qd2+=) 13.h3= Bf3 14.Qf3 0–0 15.a4 Qe7 (15...Bb4 16.Bb4 Nb4 17.0–0+=) 16.Qd5= Bb4 17.Bb4 Qb4 18.Kf1 (18.Qd2 Qd2 19.Kd2 Rfd8 20.Ke2 Ne5+=) 18...Nd8 (better is 18...Rfd8 19.Qa2 Ne5–/+) 19.g3?? (better is 19.Qd4 Qa5 20.Kg1+=) 19...c6–+ 20.Qc4 Qc4?? (better is 20...Qe7–+) 21.Bc4+= b6 (21...Re8!?+=) 22.Kg2 Re8 23.f4 (23.Rhb1 Rb8+–) 23...g6? (better is 23...Nb7!?+/–) 24.Rhb1+– Rb8 25.a5 b5 26.a6 Ne6 27.a7 Ra8 28.Be6 fe6 29.Ra6 Rec8 30.Rc1 (30.e4 Rc7 31.Rba1 c5+–) 30...c5 31.Rca1 Kf7 (31...Rc7+–) 32.R1a5 (better is 32.Rb6 Rc7 33.Rb5 Rca7 34.Ra7 Ra7 35.Rc5+–) 32...b4+/– 33.Rb5 Rc7 34.Rba5 (better is 34.Kf3!?+=) 34...b3 35.Rb6 Raa7 (better is 35...c4!? 36.Rb4 c3 37.Rb3 c2=) 36.Ra7+/– Ra7 37.Rb3 Ra2 38.Kf3 Ra7 39.Rc3 Rc7 40.e4 h6 ½–½. Schaefer,Sascha (1965) – Korn,Lothar (1700), remoteschach.de, 2009. (=1.d4 d5 2.b4 Nf6 3.Bb2)

3.d4 Bg4 4.f3 Bh5 5.e3 e6 6.a3 Bd6 7.c4 c6 8.c5 Bc7 9.g4 Ng4 (better is 9...Bg6!? 10.Nc3 Nfd7=+) 10.fg4+= Qh4 11.Kd2 Bg4 12.Nf3?? (better is 12.Qe1 Qe1 13.Ke1+=) 12...Qf2–+ 13.Be2 Bf3 14.Rf1 Qe2 15.Qe2 Be2 16.Ke2 Nd7 (16...Bh2 17.Nc3–+) 17.Nd2 (17.h3 g5–+) 17...Bh2 18.Rf3 Nf6 19.Rh1 Bc7 20.a4 Ne4 (20...Ke7 21.Rg1 Rag8 22.Rh3–+) 21.Rhf1?? (better is 21.Ne4 de4 22.Rfh3–+) 21...f5 22.b5 Nd2 23.Kd2 g5 24.bc6 bc6 25.Bc3 g4 26.R3f2 h5 27.a5 h4 28.Rh1 g3 29.Rff1 g2 (30.Rfg1 gh1R 31.Rh1 h3–+) 0–1. Branz – RAMBO (1800), internet, 2006.

3.Be5 Nbd7 4.d4 =+.

3.Be5 e6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.Be5).

3.Nf3 Na6 4.a3= c5 5.b5 Nc7 6.a4 g6=+ 7.Bf6 ef6–/+ 8.e3 Bg7 9.d4 c4 10.g3 Bg4 11.Bg2 Qd7 12.h3 Be6 13.Nc3 0–0 14.Ng1 Rfe8 15.Nge2 g5 16.g4 f5 17.gf5 Bf5 18.h4 h6 19.hg5 hg5 20.Qd2 Bg6 21.0–0–0 Qd6 22.Rdg1 Rad8 23.Bf3 Qf6 24.Bh5= Ne6 25.Bg6 fg6 26.Rg2 Qf3 27.Rhg1 Bf6 28.Qd1 Kg7 29.Rg3 Qf5 30.Qf1 Rf8 31.Qg2 Be7= 32.f4 a6 33.Rh3 gf4=+ 34.ef4 Nf4 35.Nf4+= Qf4 36.Kb2 g5 37.Rgh1+/– Bf6 38.Rh7+– Kg8 39.Qh3 Bd4 40.Qe6 Rf7–/+ 41.Qg6 Kf8 42.Qh6? Ke7–+ 43.Re1 Be5 44.Rf7 Kf7 45.Kb1?? Bc3 46.Qe6 Kg7 47.Qe7 Kg6 48.Qd8 Be1 49.Qe8 Qf7 50.Qe1 ab5 51.ab5 Qd7 52.Qa5 g4 53.Qb6 Kf5 54.Qc5 g3 55.b6 Ke4 56.Qc7 Qf5 57.Qb7?? g2–+ (57...g2 58.Qe7 Kf3–+) 0–1. Gurgenidze,B (2180) – Khotenashvili,B (2300), 1st Alexandr Buslaev Mem, Tbilisi GEO (6), 2007.

3.Nf3 g6 4.Bf6 (4.e3 a5=) 4...ef6 5.a3 Bg7 (5...a5 6.b5=) 6.e3 0–0 7.c4 (7.d4 a5 8.b5 f5=) 7...Re8 8.cd5 f5 (8...Qd5 9.Nc3 Qd8 10.d4=) 9.Nc3+= Nd7 10.Bb5 Qf6 (10...f4 11.0–0+=) 11.0–0 g5 (11...f4 12.e4+/–) 12.Rc1 (12.d4 f4 13.Qa4 Re7+/–) 12...c6 (12...g4 13.Nd4+/–) 13.Ba4 g4 (better is 13...a5!?+/–) 14.Nd4+– Ne5 (14...b5 15.Bc2 Nb8 16.dc6 Nc6 17.Ndb5+–) 15.dc6 bc6 16.Nc6!! Qh6 17.Ne5 Be5 18.g3 Bb7? 19.f4! gf3 20.Rf3 Bf3+/– 21.Qf3 Bc3 22.Be8+– Bd2 23.Bf7 Kg7 24.Rc7 Be3 25.Kg2 Rd8 26.Bd5 Kh8 27.Qf5 Bd4 28.h4 Rf8 29.Rh7! (29...Qh7 30.Qf8 Qg8 31.Qg8#) 1–0. Bulcourf,Carlos (2210) – Petrungaro,Omar, Traffic op Buenos Aires, 1992.

3.f4 d4 4.Nf3 e6 5.Nd4 Bb4 6.e3 c5 7.Nb3 c4 8.Bc4 Ne4 9.Qg4 g6?? (better is 9...Bf8+/–) 10.Bh8+– 1–0. b4_player – jan, internet, 2013.

3.f4 Bd7 4.e3 Nc6 5.b5 Na5 6.Nf3 Nc4 7.Bc4 dc4 8.Na3 Be6 (8...e6!?=) 9.Qe2 Qd5 10.Ne5 Pawn c4, live or die! 10...0–0–0 11.Nac4 Ne4 12.f5! Bf5 13.d3 f6 14.de4 Qb5?? (better is 14...Be4 15.Nf3 e5+–) 15.Nd6! Rd6 (15...cd6 16.Nf7 Double attack (16.Qb5 Discovered attack; 16.Nf7 Decoy; 16.ef5 Zwischenzug); 15...Rd6 16.Nf7 Double attack (16.Qb5 Discovered attack; 16.Nf7 Decoy; 16.ef5 Zwischenzug); 15...ed6 16.Nf7 Double attack (16.Qb5 Discovered attack; 16.Nf7 Decoy; 16.ef5 Zwischenzug)) 16.Qb5 (16.Qb5 Be6 17.Nc4 Bc4 18.Qc4+–) 1–0. b4_player – hannam, casual, 2013.

3.f4 Ne4 4.d3 Nd6 5.Nf3 Nc6 6.a3 Bg4 7.e3 e5 (7...Nf5!? 8.b5 Nb8= (< 8...Ne3 9.Qe2+/–)) 8.fe5+= Bf3? (better is 8...Nf5 9.Qd2 Bf3 10.gf3 d4 11.ed4 Ncd4=) 9.Qf3+– (9.gf3?! Nf5 10.Qd2 d4 11.ed4 Nfd4=) 9...Nb5 (9...Nc8 10.b5 Na5 11.Bc3+–) 10.a4 (10.d4 a6+–) 10...Bb4 (better is 10...Qh4 11.Qf2 Qb4 12.c3 Qb3 13.ab5 Ne5+–) 11.Kd1 0–0 (11...Na3 12.Na3 (12.Ra3?! Ba3 13.Na3 0–0+–) 12...0–0 13.Be2+–) 12.ab5 Ne7 13.Qg4 Bc5 14.e6 Ng6 15.d4 Bd6 16.e4 de4 17.ef7 Rf7 18.Qe4 Kh8 19.Bc4 Rf4 20.Qb7 Bc5 21.c3 Bb6 22.g3 Rf2 23.Nd2 c5 24.bc6 Ne5 25.Bb5 Rb8 26.c7 Bc7+/– 27.Qa6 Bb6?? 28.Ke1 Rf6 29.Qa2 Ng4 30.Ne4 Qe7+= 31.Qd5 Re6 32.Kd2 Rd8? 33.Nd6?? Red6= 34.Qf3 Ne5?? 35.Qe3 Nc6? 36.Rhe1 Qe3? 37.Ke3 Na5 38.h4 h6 39.Bd3 Nb3 40.Ra4?? Re6 41.Be4 Rde8?? 42.Kd3+– Na5 43.c4 (43...Nb3 44.Ra2=; 43.Bc1!? Nb7 44.Re3 Nd6+–) 1–0. Bonetti,Shane – reptile, ICC, 2002.

3.f4 e5 4.fe5 Ne4 5.Nf3 =+.

3.f4 Ng8 4.Nf3 Bg4 5.e3 e6 6.a3 Bd6?? (6...Nf6 7.Be2=) 7.d3 (better is 7.Bg7 e5 8.Bh8+–) 7...f6 (7...Nf6 8.c4=) 8.Be2 Nd7 9.Nbd2 (9.Nd4 Be2 10.Qe2 Qe7+=) 9...Qe7 (9...c5 10.bc5 Nc5 11.0–0=) 10.h3 Bh5 11.g4 (11.c4 c5 12.bc5 Nc5+=) 11...Bg6= 12.c4 e5 (12...c5 13.bc5 Nc5 14.Qc2=) 13.f5 (13.c5 Bc5 14.bc5 ef4+/–) 13...Bf7 (13...e4!? 14.de4 de4=) 14.c5+/– Bc5 (14...Nc5 15.bc5 Bc5 16.d4 ed4 17.ed4+/–) 15.bc5+– Nc5 16.Qc2 0–0–0 17.Rc1 b6 18.d4 Ne4? 19.Ba6 Kd7 20.Qc7 Ke8+– 21.de5 Qc7 22.Rc7 h5 23.e6 Be6 24.fe6 Nd6 25.Rg7 Ne7 26.Bf6 Ndc8 27.Bb5 Kf8 28.Rf7 Kg8 29.gh5 Rh7 30.Rg1 Ng6 31.Rg6 Rg7 32.Rgg7 Kh8 33.Rg6 1–0. bigman (2040) – taff, net–chess.com, 2001.

3.g3 a5 4.b5 Nbd7 (4...Bf5 5.Nf3=) 5.Bg2 (5.Nf3 a4=+) 5...e5=+ 6.Nf3 e4 (6...Bd6 7.0–0=+) 7.Nd4 c5 8.bc6 bc6 9.a4 (9.0–0 Qb6 10.Qc1 Rb8–+) 9...Qb6 (9...Ne5 10.Nc3=+) 10.Ra2 (10.Nb3 Be7=+) 10...Bc5–/+ 11.c3 (11.e3 Rb8–/+) 11...Ne5 12.0–0 0–0 (12...Rb8 13.Ba3 Bd4 14.Rb2 Bf2 15.Rf2–/+) 13.Ba3=+ Ba3 14.Na3 (14.Ra3 c5 15.Rb3 Qd8=+) 14...Bg4 15.h3 Bh5 16.Nac2 (16.g4 Bg6=+) 16...Bg6 (16...c5 17.Nb5=+) 17.Ne1 (17.Ra3 Qc7=+) 17...Nh5 (17...Rab8 18.Ra3–/+) 18.d3 (18.Kh2 c5 19.Nb5 Nf6=+) 18...f5 (18...Rab8 19.Rc2=+) 19.de4 (19.Ra3 c5 20.Qb3 Qb3 21.Nb3 c4=+) 19...fe4 20.e3 (20.Nec2 Rab8=+) 20...c5 (20...Rab8 21.Ra3–/+) 21.Qb3 Qd6 22.Nb5 Qe7 23.Ra1 Nc4 24.Rd1 Bf7 25.Nc2 Qe5 26.Qb1 Rad8 27.Kh2 Be6 28.Qc1 Rf7 29.Nca3 Na3 30.Na3 Rdf8 31.Qd2 Nf6 32.c4 h5?? 33.cd5 Bd5 34.Qa5+= Be6 35.Rc1 Qb2 36.Qc3 Qc3+= 37.Rc3 Nd5 38.Rcc1 Nb4? 39.Kg1 Nd3+= 40.Rc2 Bb3 41.Rd2 (White gets the initiative) 41...Re7 42.Nb1 Bf7 43.Nc3+/– Bg6 44.a5 c4 45.Ra1 Ra8 46.Ra4 Nc5 47.Rc4 Ra5 48.Rd5 Ra1 49.Kh2 Nd3 50.Ne4 Be4 51.Be4 Nf2 52.Rc8 (52...Kf7 53.Rf5 Ke6 54.Rf2+–) 1–0. Olsen,Peter Erik – Nilsson, Hillerod, 1992.

3.g3 c6 4.Bg2 Bf5 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6 4.g3 Bf5 5.Bg2).

3.g3 Qd6 4.a3 e5 5.Bg2 Be7 6.Nc3 0–0 7.Nf3 e4 (7...c6 8.0–0=+) 8.Nd4=+ a6 (8...Nc6 9.Nc6 Qc6 10.0–0=+) 9.d3= c5 (9...Qe5!? 10.de4 de4 11.Ne4 Ne4=+) 10.bc5+= Qe5 11.Nb3 e3 (better is 11...Qe6!?+=) 12.Nd5+– ef2 13.Kf1 Qb2 14.Ne7 Kh8 15.Nc8 (15.Kf2? Ng4 16.Kg1 Qf6 17.Ng6 Qg6–+) 15...Ng4 (15...Rc8 16.Qb1 (16.Kf2?! Ng4 17.Kg1 Nc6+–) 16...Qe5 17.Bb7+–) 16.Qc1 Qc1 17.Rc1 Rc8 18.Bb7 Nc6 19.Ba8 Ra8 20.h3 Ne3 21.Kf2 Re8 22.g4 (22.c3 Nb8+–) 22...Nd5 23.e4 Nc3 24.Rhf1 g5 25.Kg2 Kg7 26.Rf5 h6 27.Rcf1 Re7 28.Rf6 Ne5 29.Ra6 Ne2 30.a4 Nf4 31.Kh2 h5 32.gh5 Nh5 33.c6 g4 34.hg4 Ng4 35.Kh3 Ne3 36.Rg1 Kh7 37.Nd4 f6 38.Rb6 Rc7 39.Rb7 1–0. grimstad – patman007, ChessWorld.net, 2005.

3.h3 Nc6 4.b5 Na5 5.Nf3 Nc4 6.Bc3 (6.Bd4 a6=+) 6...e6 (6...Ne4 7.e3=+) 7.d3 Bc5?? (better is 7...Nd6=+) 8.dc4+– (8...Ne4 9.e3 Nc3 10.Nc3+–) 1–0. dale4 – EELDROP, Live Game Caissa's Web, 2005.

3.h3 Qd6 4.a3 Bf5 5.e3 Nc6 6.Nf3 a6 7.c4 dc4 8.Bc4 b5 9.Bb3 a5 10.Nc3 Bd3 (< 10...ab4 11.Nb5 Qd7 12.ab4 Ra1 13.Qa1+/–) 11.ba5 Ra5 12.Ne2 Bf5 (12...e5 13.a4=+) 13.d4 e6 14.0–0 Be7 15.Qe1 b4 (15...Ra7 16.a4 b4 17.Ne5=) 16.a4 (16.Ne5!? ba3 17.Nc6 ab2 18.Ra5+=) 16...Ra7 17.Rc1 Rb7 (17...Na5 18.Bd1=+) 18.Ne5 Na5 19.Bc2 (19.Bd1!?=) 19...Bc2=+ 20.Rc2 0–0 21.f3 Nd5 22.e4? (better is 22.Qf2!?–/+) 22...Ne3–+ 23.Rc5 Nf1 24.Ra5+= Ne3 25.Qd2 f6–/+ 26.Qe3 fe5 27.Re5 Qc6 28.Qb3= Rf6 29.Kh1 Qa6–/+ 30.Qd1 Bd6 31.Rg5 Rf7 32.d5 Qc4 33.de6 Qe6 34.Nd4 Qh6 35.Rg4 Qf6=+ 36.Bc1 Qe5 37.g3 Qh5 38.Kg2= Qe5 39.Nb5 Qa1–+ 40.Qc2 b3! 41.Qb3?? Qc1 42.h4 Qd2 43.Kh3 c6 44.Qc3 Qd1 (45.Rg5 cb5 46.Rb5 Qf1 47.Kh2 Rb5 48.ab5 Qf2 49.Kh1 Bg3 50.Qc8 Rf8 51.Qc4 Kh8 52.Qe2 Qe2 53.Kg1 Qf2 54.Kh1 Qf1#) 0–1. thotares (1625) – deepaktnj, internet, 2007.

3.h3 Bf5 4.g4 (4.Nf3 e6 5.a3 a5=+) 4...Be4 5.Nf3 e6 6.Bg2 (6.a3 a5=+) 6...Bb4–/+ 7.a3 Ba5 (7...Bd6 8.Nc3 Bf3 9.Bf3–/+) 8.0–0 (8.Nc3 0–0–/+) 8...h5 (8...0–0 9.d3 Bf3 10.Bf3–/+) 9.g5=+ Bf3 (9...Nh7 10.h4=+) 10.ef3 Nh7 (better is 10...Nfd7 11.f4 Kf8=+) 11.Bg7?? (better is 11.f4=) 11...Rg8–+ 12.Bf6?! Nf6 13.gf6 Qf6 14.c3 Qg7 (15.Qa4 Nd7–+; 14...Qg6 15.Qa4 Nc6 16.Qg4 hg4 17.fg4–+) 0–1. trex1 – Kvile2, Live Game Caissa's Web, 2005.

3.Nh3 Qd6 4.b5 Qb4 5.Be5 (5.Bf6!? ef6 6.e3–/+) 5...Bh3–+ 6.gh3? (better is 6.Bf6!? ef6 7.gh3–+) 6...Qe4 (6...Qb5?! 7.Bc7 d4 8.Bb8 Rb8 9.a4–/+) 7.Bc7? (7.Bf6 Qh1 8.Bb2–+) 7...Qh1 8.d3 Nbd7 9.Nd2 e5 10.Nf3 (10.a3–+) 10...Bb4 11.Nd2 Rc8 12.a3 (12.c3 Bc3 13.Bd6 Ba1 14.Qa1 e4–+) 12...Bd2 13.Qd2 Rc7 14.0–0–0 0–0 15.Qg5 (15.e3 Rfc8–+) 15...Rfc8 16.c4 dc4 17.d4 Qd5 18.e3 Qb5 (better is 18...c3 19.Bc4 Qc4 20.Rg1–+) 19.f4 Qb3 20.fe5 c3 21.Rd3 (21.Qg2 Qa3 22.Kc2 Qb2 23.Kd3 Ne5 24.de5 Rd8 25.Qd5 Rd5) 21...Qb2 22.Kd1 c2 (22...c2 23.Ke1 c1Q 24.Rd1 Qbd2) 0–1. Penteshin,Yury – Kiriushin,V (2195), Doroshkevicha Mem, Belorechensk RUS, 2009.

3.Nh3 e6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.Nh3).

3.h4 Qd6 4.h5 Qb4 5.Bc3 Qd6 6.Nf3 Nc6 7.e3 e5 8.Bb5 e4 9.Ne5 a6 10.Bc6 bc6 11.d4 a5 12.Nd2 a4 13.0–0 Ba6 14.Re1 Be7 15.Rb1 0–0 16.Bb4 Qb4? (better is 16...Qe6 17.Be7 Qe7) 17.Rb4 Bb4 18.c3 Bd6 19.Nc6 Bb5 20.Ne5 c5 21.h6 gh6 22.Ng4 Kg7 23.Nf6 Kf6 24.c4 dc4 25.Ne4 Ke7 26.Nd6 Kd6 27.Qh5 Rac8 28.Qe5 Kd7 29.Rb1 f6 30.Qf5 1–0. Wall,Bill – Guest1255711, playchess.com, 2012.

3.a3 a6

4.e3 Nc6 5.Nf3 e6 6.c4 Bd6 7.cd5 ed5 8.Be2 0–0 9.0–0 Re8 10.Re1 Ne5 (10...Bg4 11.h3 Bf5 12.Nc3=) 11.d3 (11.Ne5 Be5 12.Be5 Re5=) 11...Nf3 12.Bf3 c6 13.Nd2 h6 14.Be2 Bf5 15.Nf3 a5 16.Qb3 a4 17.Qd1 c5 (17...Bc7 18.Rc1=) 18.bc5 Bc5 19.Rc1 Qd6 20.Nd4 (20.Rc3=) 20...Bg6 (better is 20...Bd4!? 21.ed4 Re7+=) 21.Nb5+/– Qb6 22.d4 (better is 22.Bf6!? gf6 23.d4+/–) 22...Be7= 23.Qd2 (23.Bf1!?=) 23...Ne4–/+ 24.Qd1 Rac8 (better is 24...Ra5!?–/+) 25.f3 Nd6 26.Qa4 Ra8 (26...Bg5 27.Bf1=) 27.Qb3+= Nb5 (27...Bg5 28.f4 Bh4 29.g3+– (29.Qd5 Be1 30.Qd6 Qa5+=)) 28.Qb5 (28.Bb5 Red8+/–) 28...Qb5 29.Bb5 Red8 30.a4 Bb4 31.Re2 Rdc8 32.Rc8 Rc8 33.Kf2 Rc2 34.Rc2 Bc2 35.Ke2 Bb3 36.Kd3 Kf8 37.e4 Ke7 38.Bc3 Bc3 39.Kc3+– Ba2? 40.ed5 Bd5+/– 41.Bc4 Kd6 42.Bd5+– Kd5 43.Kd3 f5 44.h4 g5 45.hg5 hg5 46.g3 b6 47.Kc3 Kd6 48.Kc4 f4 49.gf4 gf4 50.Kb5 1–0. Fournier,Frederic – oger, Online chess match, 2012.

4.e3 Nc6 5.Nf3 Bg4 6.Be2 Bf3 7.Bf3 e6 8.d4 Bd6 9.Nd2 Ne7 10.0–0 0–0 11.c4 c6 12.cd5 cd5 (worse is 12...Ned5 13.e4+–) 13.Rc1 Nc6 14.Re1 Qc7 15.h3 Rac8 16.e4 de4 17.Ne4 Ne4 18.Be4 Qd7 (18...Bh2 19.Kh1 Bf4 20.Rc4+=) 19.Qd3 g6 20.d5 ed5 21.Bd5 (21.Bd5 Be5 22.Be5 Ne5 23.Qe4+/–) 1–0. Fournier,Frederic – ranaplana, Active, 2008.

4.Nf3 c6 5.e3 e5 (5...Nbd7!?=) 6.Ne5 Bd6 7.Nf3 Be6 8.d3 (8.Be2 0–0+/–) 8...Qc7 (8...a5 9.ba5 Ra5 10.e4 de4 11.de4 Ne4 12.Bg7+=) 9.Nbd2 Nbd7 10.h3 (10.c4 b6+/–) 10...b5 11.Be2 Ke7 (11...a5!?+=) 12.0–0 Rag8 (12...a5 13.ba5 Rhb8 14.Nb3+/–) 13.e4 de4 14.Ne4 Ne4 15.de4 f6 16.e5 (16.Nd4!?+–) 16...Be5 17.Ne5 Ne5 18.Be5 Qe5 19.Bf3 (19.Re1!? Rd8 20.Bd3+/–) 19...Rd8+= 20.Qc1 Kf7 21.Re1 Qf5?? (better is 21...Qc3+=) 22.Bg4+– (22.Bc6?! Rd6 23.Be4 Qh5+/–) 22...Qd5 (22...Qg5 23.f4 (23.Re6?! Qc1 24.Rc1 h5+–) 23...Qg6 24.Be6 Kf8 25.Qe3+–) 23.Be6 (23.Re6?! h5 24.c4 bc4+/–) 23...Qe6 24.Re6 Ke6 25.Qe3 Kf7 26.Qa7 Kg6 27.Qa6 Rhe8 28.Qc6 Re2 29.Qb5 Rdd2 30.Rf1 Rc2 31.a4 Re5 32.Qb6 Rg5 33.a5 Rc3 34.f3 1–0. Fournier,Frederic (1775) – racosa, Active, 2007.

4.Nf3 Nc6 5.e3 b5 6.Be2 Bb7 (6...Qd6 7.a4 ba4 8.b5 ab5 9.Bb5=) 7.0–0 Qd6 8.d3 e5 9.c4 dc4 (9...Qe6 10.cb5 ab5 11.Nc3+/–) 10.dc4 bc4 11.Nbd2 e4 12.Ng5 (better is 12.Nd4+=) 12...g6? (better is 12...h6 13.Nh3 Rd8 14.Nc4 Qd1 15.Rfd1 Be7+=) 13.Nde4 (< 13.Nge4 Ne4 14.Ne4 Qd1 15.Rfd1 Be7 16.Bh8 Nb4 17.ab4 Be4+–; < 13.Bc4 Nd8 14.Nge4 Ne4 15.Ne4 Be4 16.Bh8 c5+–) 13...Ne4 14.Ne4 (14.Bh8?! Qd1 15.Rad1 Ng5 16.Bc4 Bd6=) 14...Qd1 15.Rfd1 (< 15.Rad1 Be7 16.Bh8 Nb4 17.ab4 Be4+–) 15...Nb4 (15...Be7 16.Bh8 Nb4 17.Nf6 Bf6 18.Bf6 Nd5+–) 16.Nf6 Ke7 17.Rd7 Ke6 18.Bg4 1–0. Creatchy – patman007, ChessWorld.net, 2005.

3.a3 b6

4.e3 Bb7 5.c4 dc4 6.Nf3 Ba6 (6...Bd5 7.Nc3=) 7.Nc3 (7.Bf6 ef6 8.Qc2 Bb7=) 7...g6 (7...c6!?=) 8.Qa4 Qd7 9.Qd7 (9.b5 Bb7+/–) 9...Nbd7+= 10.b5 Bb7 11.Bc4 Bf3 12.gf3 Ne5 (12...Bg7 13.Ne4+=) 13.Be2+/– 0–0–0 14.d4 Ned7 15.a4 (15.Ne4 Bg7+/–) 15...e6+= 16.e4 (16.a5 Bb4 17.ab6 ab6+=) 16...Bb4 17.Rc1 Nh5 18.Kf1 Nf4 (18...Kb7 19.Bc4+=) 19.Bc4 Nh3 (19...Nh5 20.Ne2+=) 20.Ne2+/– Ng5 (20...Bd2 21.Rc2 Bg5 22.d5+/–) 21.Kg2 Rhg8?? (21...h6 22.d5 Rhe8 23.h4+/–) 22.d5 e5? 23.h4+– Ne4 24.fe4 Nc5 25.f3 Na4 26.Be5 Rge8 27.Bf4 Nb2 28.Rc2 Nc4 29.Rc4 Bc5 30.Re1 Rd7 31.Nd4 f5 32.Ne6 Bd6 33.Bd6 Rd6 34.Rc7 (34...Kb8 35.Rh7 fe4 36.fe4 Ree6 37.de6 Re6 38.e5+–) 1–0. thedesertfox (2055) – flgs (1715), net–chess.com, 2004.

4.e3 Bb7 5.d4 Nbd7 6.Nf3 e6 7.Nbd2 Bd6 8.c4 Qe7? (8...a5 9.c5 Be7 10.Bd3=) 9.cd5 (better is 9.c5 bc5 10.dc5 Nc5 11.bc5 Bc5 12.Qa4 c6 13.Rb1+–) 9...ed5= (worse is 9...Nd5 10.e4+–) 10.Bd3 0–0–0 (10...0–0 11.Nh4=) 11.0–0+= Kb8 12.Qe2 h5 13.Ba6 (13.b5 Ne4+/–) 13...Ba8 (13...Ba6 14.Qa6 h4 15.h3+=) 14.Rac1 Ng4 (14...Ne4 15.Bd3+/–) 15.h3 f5 16.Bb5 (16.hg4 hg4 17.Bd3 gf3 18.Nf3 Qf6–/+) 16...g5 Black prepares f4 17.Bc6 (17.Bd7 Rd7 18.Rfd1 f4+=) 17...Bb7? (better is 17...Bc6 18.Rc6 Nh6=) 18.Bb7+/– (worse is 18.hg4 hg4 19.Rfe1 Bc6 20.Rc6 Rh6–/+) 18...Kb7 19.b5 (better is 19.Qb5!? Ngf6 20.Qc6 Kb8 21.Ng5+/–) 19...f4 20.Ne5 (20.e4 Nh6 21.e5 g4+/–) 20...Nde5 21.de5 Ne5 22.ef4 gf4 23.Rfe1 Rhe8 24.Qh5 Qg7 25.Nf3?? (better is 25.Kf1 Re7 26.Nf3+=) 25...Nf3–+ 26.Qf3 Qb2 27.Qd5 Kb8 28.Rb1 Re1 29.Re1 f3 30.Qf3 Rf8 31.Qe2 Qf6 32.g3 Qg5 33.Kg2 Qd5 34.Qe4 Qb5 35.a4 Qb2 36.Re2 Qf6 37.h4 c5 38.Qc6 Bc7?? 39.Re8+– Bd8 40.Rf8?? Qc6–+ (40...Qc6 41.f3 Kc8–+; 40...Qf8?! 41.h5–/+) 0–1. Fournier,Frederic – zaknuz (1690), Active, 2008.

4.e3 Bb7 5.Nf3 a5 =.

4.e3 e6 5.Nf3 =.

3.a3 c5

4.bc5 Nc6 5.d4 e5 6.e3 e4 (6...ed4 7.ed4 Be7 8.Nf3=) 7.f3 (7.c4 Be6+=) 7...a6 (7...b6 8.cb6 Qb6 9.Ra2=) 8.fe4 (8.c4 b6+=) 8...Bg4 (8...Ne4!? 9.Qf3 Qa5 10.c3 b6=) 9.Be2+= Be2 10.Qe2 Ne4 11.Nf3 Be7 (11...b6!?=) 12.0–0+/– 0–0 (12...b6 13.cb6 Qb6 14.c4+/–) 13.Nbd2 f5 14.c3 (14.c4 Rb8+/–) 14...Bf6 15.Rab1 Rb8 16.Ne1 b5 17.Nd3 (17.Rf5 Qd7 18.Rf1 Nd2 19.Qd2 Na5+/–) 17...Na5 (17...Qc8 18.Nf4 Qd7 19.Ne4 fe4 20.Qh5+=) 18.Ne4 fe4 19.Nb4 Nc4 (19...Qd7 20.Qh5 Rbd8 21.Bc1+/–) 20.Na6 (better is 20.Nc6!? Qd7 21.Nb8 Rb8 22.Bc1+–) 20...Ra8 21.Nb4 Nb2? (better is 21...Qd7!?+/–) 22.Rb2 Ra3 23.Qh5 Qa5?? 24.Nd5 Ra1 25.Rbb1 Rb1 26.Rb1 Qa2 27.Rf1 Qd2 28.Nf6 Rf6 29.Qd5 Kf8+– 30.Qd8 Kf7 31.Qd7 Kg6 32.Qg4 Kf7 33.Qd7 Kg6 34.Qg4 Kf7 35.Qd7 ½–½. Fournier,Frederic (1970) – Artsutaraz (1980), Active (2/0), 2005.

4.bc5 e6 5.d4 Nc6 6.e3 Be7 7.Nf3 Nd7 (7...b6 8.Ne5 Ne5 9.de5+=) 8.Nbd2 f5 (8...b6 9.cb6 Qb6 10.Rb1+/–) 9.Bd3 Nf6 10.0–0 Ne4 11.c4 Nd2 12.Qd2 dc4 (12...Na5 13.cd5 Nb3 14.Qb4 Na1 15.Qa4 (15.Ra1?! ed5 16.Bb5 Kf7+/–) 15...Kf7 16.Ne5 (16.Ra1?! ed5 17.Ne5 Kf6+/–; 16.Ba1?! ed5 17.Ne5 Kf6+/–) 16...Kg8 17.d6+– (17.Ba1 ed5 18.Bc3 Be6+/–; 17.Ra1?! ed5 18.Rc1 Be6+/–)) 13.Bc4 g5? (13...0–0 14.Rfd1+–) 14.h3?? (better is 14.d5 ed5 15.Bd5+– (15.Bh8?! dc4 16.Qc3 Qd5+–)) 14...g4+/– 15.hg4 fg4 16.Nh2 h5 17.g3 Qc7 18.Rfb1 Bd7 19.Bf1 0–0–0 20.Bg2 Rdf8 21.Nf1 h4 22.Qe1 hg3 23.Ng3 Bh4 24.Qe2?? Bg3–+ 25.fg3 Ne7 26.Rf1 Rf1 27.Rf1 Bc6?? 28.Bc6 Qc6?? 29.Qg2 Qg2 30.Kg2 Nd5 31.Bc1 Ne3?? 32.Be3 Kc7 33.Re1 Kc6 34.Bf2 Kd5 35.Rd1 Ra8 36.Bg1 a5 37.Rf1 Ra6 38.Ra1 b6 39.cb6 Rb6 40.a4 Rc6 41.Bf2 Rc4 42.Re1 (42.Re1 Ra4 43.Re5 Kd6 44.Rg5+–) 1–0. Fournier,Frederic (2020) – jafelle2 (2050), Active Blind, 2007.

3.a3 c6

4.d4 Bf5 5.e3 e6 6.c4 Be4 (6...Bd6 7.Nd2=+) 7.Nf3 Bb1 8.Rb1 Bd6 9.Qc2 0–0 10.c5 Bc7 11.Qd2 (11.Bd3 Nbd7+=) 11...b6 12.Bd3 b5 13.Bc2 Ne4 14.Qd3 f5 15.Nd2 (better is 15.0–0=) 15...f4?? (better is 15...a5–/+) 16.f3?? (better is 16.Ne4 fe3 17.Qe3+–) 16...fe3 (better is 16...Qh4 17.Ke2 Qf2 18.Kd1 Qg2–+) 17.fe4 (17.Ne4 A) 17...de4? 18.Qe4 (18.Qe3?! ef3 19.0–0 Qh4=; 18.fe4 Qh4 19.Kd1 e2 20.Kd2 Qg5 21.Kc3 Qg2–+) 18...Qg5 19.Qh7 Kf7 20.g3+–; B) 17...Qh4 18.g3 de4 19.gh4 ed3 20.Bd3 Rf3=) 17...ed2 18.Kd2 Qg5 19.Kc3 Nd7 (19...e5 20.Kb3 Qg2 A) 21.de5?? Rf3 22.Qf3 Qf3 23.Ka2 a5 24.ed5 cd5–+ (< 24...Qd5 25.Bb3+/–); B) 21.Rbg1 de4 22.Rg2 ed3 23.Bd3=) 20.e5 Qg6?? (20...Qh4 21.Rhf1=) 21.Qe2?? (better is 21.Qg6!? hg6 22.a4+–) 21...Qh6 (21...Qe8 22.Qd3 Qh5 23.h4+=) 22.Bc1 (22.h4 g6 23.Bc1+/–) 22...Qh4= 23.g3 Qh3 24.Rf1?? (better is 24.Kb2=) 24...Rf1–+ 25.Qf1 (25.Be3 Rff8 26.Kb2–+) 25...Qf1 26.Bd2 (26.Bd3 Qf2 27.Rb2 Qe1 28.Bd2 Qa1–+) 26...Qf3 (27.Bd3 a5–+; better is 26...Qc4!? 27.Kb2 Qd4 28.Bc3–+) 0–1. slavisa99 – SirCharles, Live Game Caissa's Web, 2004.

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.a3).

4.e3 Bf5 5.Nf3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.e3 Bf5 5.Nf3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

4.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6 4.a3).

3.a3 d4

4.c3 e5 5.cd4 ed4 6.d3 a6 (6...c5 7.bc5 Bc5 8.Nd2–/+) 7.Nf3 (7.e4 de3 8.Qe2 Ng4–/+) 7...Nc6 8.h3 (8.Nbd2!?=) 8...Bg4?? (better is 8...Be6=+) 9.hg4+– (9...Ng4 10.Qa4+–) 1–0. PoPer – ross60, Live Game Caissa's Web, 2004.

4.e3 de3 5.fe3 Bg4 (5...a5 6.b5=) 6.Be2+= Be2 7.Qe2 e6 (8.Qb5 Nbd7 9.Qb7 Be7+/–; 7...Nbd7 8.Nf3+=). tirpitz (2085) – hsingletary (2155), net–chess.com, 2006.

4.Nf3 e6 5.e3 c5 6.bc5 Bc5 7.Nd4 Nc6 8.Nc6 bc6 9.Qf3 Bb7 10.Bd3 h5 11.Nc3 Bd6 12.Ne4 c5?? (better is 12...Ne4 13.Be4 Kf8+–) 13.Bf6 (13.Nd6?! Qd6 14.Bb5 Kf8 15.Qb7 Rb8 16.Qa7 Rb5+–) 13...Qb6 (13...gf6 14.Nd6 Qd6 15.Qb7 Rb8 16.Qa7 0–0+–) 14.Nd6 Qd6 15.Qb7 Rb8 16.Be7! Qe7 (16...Qe7 17.Bb5 Double attack (17.Qb8 Deflection)) 17.Bb5 Kf8 18.Qb8 1–0. capablancaven (2130) – johnbaptist, gameknot.com, 2011.

3.a3 Bg4

(--> 1.b4 d5 2.Bb2 Bg4 3.a3 Nf6).

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.a3).

3.a4 g6

4.e3 Bg7 5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a4).

4.Nf3 Bg7 5.e3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a4).

4.h3 Bg7 5.g4 0–0 6.Bg2 Nbd7 7.Nf3 b6 8.d3 c5 9.bc5 Nc5 10.g5 Nh5 11.Bg7 Ng7 12.Ne5 Bb7 13.0–0 Nf5 14.d4 Ne4 15.f3? (better is 15.a5+=) 15...Ne3–+ (worse is 15...Ng5 16.Qd3–/+) 16.Qd3 (16.Qc1 Nf1 17.Bf1–+) 16...Nf1 17.Kf1 Ng3 (17...Ng5!? 18.f4 Ne4 19.Nd2–+) 18.Kf2 Nf5 19.e4 (19.Kg1–+) 19...de4 20.fe4 Qd4 21.Qd4 Nd4 22.c3 Nb3 23.Ra3 Nc5 24.Ke3 Rad8 25.Nd2 (25.a5 f6 26.ab6 ab6 27.gf6 ef6–+) 25...f6 26.gf6 ef6 (26...Rf6?! 27.Nb3–+) 27.Nef3 Rfe8 28.Nd4 f5 29.Kf4 (29.a5 Be4 (29...fe4?! 30.ab6 ab6 31.Nc4–+) 30.Ne4 Ne4 31.Be4 Re4 32.Kf2 ba5 33.Ra5 Rc8–+) 29...Ne4 30.Ne4 Be4 31.Bf1 Bb7 32.Bc4 (32.a5 Re4 33.Kg3 Re3 34.Kf2 f4–+) 32...Kh8 33.Bf7 (33.Bd3 Kg7 34.h4 Kf6–+) 33...Re4 34.Kg3 Re3 35.Kh4 Rd4! (35...Rd4 36.cd4 Ra3–+) 0–1. spensley – jeronimofuentes (1685), gameknot.com, 2013. (=1.a4 d5 2.b4 g6 3.Bb2 Nf6)

3.b5 d4

4.Nf3 c5 5.bc6 Nc6 6.h3 (6.e3 e5+=) 6...e5+= 7.e3 de3 8.fe3 Qc7 9.Qe2 (9.Bb5 e4 10.Ne5 Bd6 11.Nc6 bc6–/+) 9...Bd6 10.e4 a6 (10...Nb4 11.Na3 Nc2 12.Nc2 Qc2 13.Be5 Be5 14.Ne5–/+) 11.c3 (11.Nc3 0–0–/+) 11...Be6 12.Na3 h6 13.Nc4 Bc5 14.Ne3? (better is 14.d4 Nh5 15.Rg1–/+) 14...Ne4–+ 15.Rg1 Ng3 16.Qf2 Nf1 17.Rf1 0–0–0 (17...e4 18.d4 Bd6 19.Ne5 Be5 20.de5 Ne5 21.Qc2 Nd3 22.Ke2–+) 18.Ke2? (18.Qh4 f5–+) 18...f6 (18...Bc4 19.Ke1 Be3 20.de3–+) 19.Qh4? (19.d4 ed4 20.cd4 Bd4 21.Bd4 Nd4 22.Nd4 Bc4 23.Nc4 Qc4 24.Kf3 Rd4 25.Rac1 Rd3 26.Qe3 Re3 27.Ke3 Re8 28.Kf3 Qc6 29.Rc6 bc6 30.Rc1–+) 19...g5 (19...Be3 20.de3 Bc4 21.Kf2 Bf1 22.Rf1–+) 20.Qa4 Be3 21.de3 h5 (better is 21...Bc4! 22.Kf2 Bf1 23.Rf1–+) 22.Nd2 f5 23.c4 (23.Rad1 f4 24.ef4 gf4–+) 23...Rhf8 (better is 23...Qd7 24.Qc2 Nb4–+) 24.Nf3?? (better is 24.Rfd1–+) 24...g4 (24...Bc4 25.Qc4 Nd4 26.Qd4 Qc2 27.Nd2 ed4 28.Rfc1 d3 29.Ke1–/+) 25.hg4 (25.Nd2 f4 26.e4 gh3 27.gh3 Bh3–+) 25...hg4 (better is 25...fg4!? 26.c5 Qd7 27.Rfd1 gf3 28.gf3–+) 26.Nd2 Qd6 27.Rad1 (27.Qc2 Nb4 28.Qc3 Na2 29.Ra2 Qd2 30.Qd2 Bc4 31.Ke1 Rd2 32.Kd2 Ba2 33.Be5–+) 27...Qd3 28.Kf2 g3 29.Kg3 Qe3 30.Rf3 Qg5 (30...f4 31.Kh2 Rh8 32.Rh3 Bh3 33.Qc6 bc6 34.gh3 Qf2 35.Kh1 Rh3) 31.Kh2–+ Rd2 32.Rd2 Qd2 33.Qa3 Rh8 34.Rh3 Rh3 35.Kh3 Qh6 (35...f4 36.Kh2 f3 37.Qf3 Qb2 38.a3–+) 36.Kg3 f4 37.Kf2 Qh4 38.Kg1 Qe1 39.Kh2 Qg3! 40.Qg3 0–1. zabazaba (1630) – ogucis, gameknot.com, 2014.

4.Nf3= c5 5.e3 de3 6.fe3 e6 (6...Bg4 7.Be2+=) 7.Be2 Bd6 (7...Be7 8.0–0+=) 8.0–0 0–0 9.d3 (9.Na3 Bd7+=) 9...Nd5 (9...a6 10.Na3=) 10.Qd2+= Nd7 11.c4 (11.Na3 Bc7+=) 11...N5f6 12.a4 b6 (12...Re8 13.Nc3=) 13.a5 += Bb7 =. algernon (2345) – jparkinson (2380), net–chess.com, 2008.

3.c4 d4

4.e3 d3 5.Qb3 e6 (5...a5 6.ba5 Na6 7.Nf3=) 6.Bd3 (6.Nf3 a5 7.b5 Nbd7 8.Qd3 Bd6+=) 6...Bd6 (6...Bb4!? 7.Qb4 Qd3 8.Bf6 gf6=) 7.Nf3 0–0 8.c5 Be7 9.Bc2 Bd7 10.Qc3 b6 11.g4 (11.Be4 Bc6 12.Bc6 Nc6+/–) 11...bc5 (better is 11...Bc6!? 12.e4 a5=) 12.bc5+/– Bc6 13.Ke2 (better is 13.e4!?+=) 13...Nbd7 14.h4 (14.g5!? Ne8 15.d4=+) 14...e5–/+ (< 14...Bc5 15.g5 Bb5 16.Kd1=+) 15.h5 (15.g5 Nd5 16.Qa5 Rb8–+ (16...Bc5?! 17.Ne5 Qb8 18.Nd7 Qb2 19.Qc5 Bd7 20.Na3=)) 15...Ng4 (15...Rb8 16.Bf5 Nc5 17.Qe5 Bb5 18.Kd1–+) 16.Na3 (16.Rg1 f5–/+) 16...Bf6 (16...Bc5 17.Rag1 f5 18.d4 Bf3 19.Kf3 e4 20.Ke2–/+) 17.Qc4 (better is 17.e4–/+) 17...Qe7?? (17...Rb8 18.Qg4 Rb2 19.Qf5 Rc2 20.Nc2 Nc5 21.Nb4–+) 18.Rag1?? (18.Qg4 Nc5 19.h6 g6+/–) 18...Nc5?? (better is 18...Nh6–+) 19.Qg4+/– h6? (19...Rab8 20.Bc3+/–) 20.d4 (better is 20.Qf5 Bf3 21.Kf1+– (21.Kf3?! e4 22.Be4 Ne4 23.Qe4 Qe4 24.Ke4 Bb2+/–)) 20...ed4?? (better is 20...Rfb8!? 21.Nc4 Rb2 22.Nb2 ed4+–) 21.Bd4 (better is 21.Nd4 Be4 22.Nf5+–) 21...Bf3 22.Kf3 Bd4 23.Qd4 (< 23.ed4 Ne6 24.Nb5 Qf6 25.Qf5 Qf5 26.Bf5 Rab8+/–) 23...Ne6 24.Qg4?? (better is 24.Qd3 f5 25.Rg6+–) 24...Ng5=+ 25.Ke2 Qa3 26.Qf5 Qa6 (26...Qa2 27.Rg5 Qc2 28.Qc2 hg5 29.h6+–) 27.Ke1 Qe6?? (27...Rfb8 28.Rg5 hg5 29.Qh7 Kf8 30.Qh8 Ke7 31.Qg7=+) 28.Qe6?? (better is 28.Rg5 Qf5 29.Rf5+–) 28...fe6 29.Ke2 Rf6 (29...Rab8!? 30.f4 Rb2 31.fg5 Rc2 32.Kd3 Ra2 33.gh6 Rd8 34.Kc3 Ra3 35.Kc4 Re3 36.Rg7 Kh8 37.Rc7 Re4 38.Kc3 a5=) 30.f4+= Nf7 31.Rg6 (31.Rh2 Kh8+=) 31...Nd6 (31...e5 32.Rhg1 Rg6 33.hg6=) 32.Rhg1 (better is 32.Rc1 Rc8 33.Ba4+=) 32...Kf7?? (better is 32...Rg6 33.Rg6 Kf7=) 33.Rg7+– Ke8 34.Rg8 (34...Rf8 35.R1g7+–; better is 34.Ba4 Kd8 35.Rg8 Ke7 36.Ra8 Rf5 37.Rg7 Rf7 38.Rf7 Nf7 39.Re8 Kd6+–) 1–0. fresca100 – febble, Live Game Caissa's Web, 2004.

4.e3 de3 5.fe3 e5 6.a3 =+.

4.Nf3 c5 5.bc5+= Nc6 6.e3 e5 7.Ne5 (better is 7.ed4!? Nd4 8.Nd4 ed4 9.Qe2 Be6 10.Qe5+=) 7...Ne5–/+ 8.ed4 Ng6 9.g3 (9.Qe2!? Qe7 10.Nc3–/+) 9...Be7 10.Bg2 0–0 11.0–0 Rb8 (11...Bg4 12.Qb3=+) 12.Qa4 a6 13.Qb3 (13.Re1 b6 14.c6 b5 15.cb5 Rb5–/+) 13...Qc7 (13...b6 14.Re1–/+) 14.Nc3 (14.Qb6 Qb6 15.cb6 Re8–/+) 14...b6 15.c6 Bf5 16.Rfe1 Bd6 17.a4 (17.Qa4 Ra8–/+) 17...Rfe8 18.Re3 Ne7 (18...Ng4 19.Nd5 Re3 20.de3=) 19.d5 Bc5 20.Re2 Bg4 21.Ree1 0–1. Nowakowski – Laskowski, corr 1. AMM Poland, 1991.

4.Nf3 Nc6 5.b5 Nb8 6.Bd4 +=.

3.c4 e6

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.c4).

4.a3 c5 5.b5 dc4 6.e3 a6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.c4 dc4).

4.c5 a5 5.a3 Be7 6.Nf3 d4 (6...ab4 7.ab4 Ra1 8.Ba1+=) 7.Nd4 e5 (7...0–0 8.d3=) 8.Nf3 e4 9.Ng5 (9.Ne5 0–0=) 9...0–0 (9...h6!? 10.Nh3 Nc6–/+) 10.Qc2 Nc6 11.b5 Nd4 (11...Qd5 12.bc6 Qg5 13.cb7 Bb7 14.c6–/+) 12.Bd4 (12.Qa4 Ne6 A) worse is 13.Ne4 Ne4 (13...Nc5?! 14.Nc5 Bc5 15.d4=) 14.Qe4 Nc5–/+; B) 13.Ne6 fe6 14.Nc3 Bc5 15.e3=) 12...Qd4–/+ 13.Nc3 e3 (13...Bc5?! 14.e3 Qe5 15.Nge4 Ne4 16.Qe4+=) 14.de3 Qc5 15.g3?? (better is 15.Nf3 Bf5 16.Qb2–/+) 15...Qg5–+ 16.Bg2 Qe5 17.0–0 Rd8 18.Rfb1 (18.Rad1 Bf5 19.Qc1 Rab8–+) 18...Bf5 19.e4 Bg6 20.f4 (20.e3 Rd7 21.Rc1 Rad8–+) 20...Qc5 21.Kh1 Nd5! 22.Nd5 Qc2 23.Ne7 Kf8 24.Ng6 hg6 25.Bf3 Rd2 26.Re1 Qb3 27.Kg2 Qb5 28.a4 Qc4 29.h4 Rad8 30.Rec1 Re2 31.Be2 Qe2 32.Kh3 Rd2 33.Rc7 f5 (33...f5 34.ef5 gf5 35.Rc8 Kf7 36.Rc7 Kf6 37.Rf7 Kf7 38.Rc1 Qg4#) 0–1. Baer,Cy (1895) – Nogler,Schimun (2400), RSS5E–11 remoteschach.de, 2007.

4.e3 Bb4 5.cd5 ed5 6.a3 (6.Qa4 Nc6–/+) 6...Ba5 (6...Bd6 7.Nf3–/+) 7.h3 (7.Nf3 0–0–/+) 7...c5 (7...0–0 8.Nf3–/+) 8.Bb5 (8.Qf3 Nbd7–/+) 8...Nc6 (8...Bd7 9.Bd7 Nbd7 10.Nf3–/+) 9.Nf3 (9.Qf3 Rg8–/+) 9...0–0 10.0–0 (10.Bc6 bc6 11.Qa4 Bd7–/+) 10...Bb6 (10...Qb6 11.Qa4 a6 12.Bc6 Qb2 13.Qa5 Qa1 14.Nc3–/+) 11.d4 (11.Bc6 bc6 12.Qa4 Qd6–/+) 11...c4 12.Nc3 a6 13.Bc6 bc6 14.Re1 c5 15.Na4 Ba5 16.Bc3 cd4 17.ed4 Ne4 18.Ba5 Qa5 19.Ne5 Re8 20.f3 Ng3 21.Kh2 Nf5=+ 22.Nc6?? Re1 23.Na5 Rd1 24.Rd1 Be6 25.Nc5 Ne3 26.Re1 Nc2–+ 27.Rc1 Nd4 28.Nc6 Nc6 (29.f4 Nd4–+) 0–1. gtate (1900) – nhathuy (2160), net–chess.com, 2006.

3.d3 d4

4.Nf3 e5 5.a3 Bd6 6.c4 dc3 7.Bc3 Nbd7 8.Nbd2 b5 9.d4 e4 10.Ne5 Bb7 (10...e3 11.fe3 Nd5 12.Qb3 Ne5 13.de5–/+) 11.e3= Nd5 (better is 11...a6!?=) 12.Bb2+/– (12.Ne4?! Ne5 13.de5 Nc3 14.Nc3 Be5 15.Qd8 Rd8+=) 12...a6 13.Ne4 (13.Nd7 Qd7 14.Ne4 Qe6 15.Nd6 cd6+/–) 13...Qe7 (better is 13...Be5!? 14.de5 Ne3 15.fe3 Be4+=) 14.Nd6+/– cd6 15.Nd7 Qd7 16.Bd3 Rc8 17.Qh5 Nf6 (17...g6 18.Qh4 Qe7 19.Qh6+/–) 18.Qg5+– Qg4? (better is 18...Qd8+–) 19.Qg4 Ng4 20.Bf5 Rc2 (20...Nf6 21.Bc8 Bc8+–) 21.Bc2 (21.Bg4?! Rb2 22.0–0 h5+/–) 21...Bg2 (21...0–0 22.0–0+–) 22.Rg1 Bf3 23.Rg3 Nh2 24.Rh3 1–0. Fritz 11 – foreverclever, internet, 2013.

4.Nf3 e5 5.a3 Bd6 6.c4 c6 7.g3 h6 8.c5 Bc7 9.Bg2 Bg4 10.0–0 0–0 11.Nbd2 Nbd7 12.e3 de3 13.fe3 Nd5 14.Qe1 Qe7 15.e4 N5f6 16.Kh1 a5 17.Qe3 b6 18.Nh4 (Better is 18.d4!?=) 18...bc5 19.Nf5 Bf5 20.Rf5 cb4 21.a4 Ng4 22.Qf3 Ndf6 (23.Rf1 Rab8–+) 0–1. pawndynasty – The_Simple, HCL–B1646 playchess.de, 2003.

3.d3 e5

4.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.d3 Nf6).

4.Nf3 e5 5.a3 Bd6 6.c4 dc3 7.Bc3 Nbd7 8.Nbd2 b5 9.d4 e4 10.Ne5 Bb7 (10...e3 11.fe3 Nd5 12.Qb3 Ne5 13.de5–/+) 11.e3= Nd5 (better is 11...a6!?=) 12.Bb2+/– (12.Ne4?! Ne5 13.de5 Nc3 14.Nc3 Be5 15.Qd8 Rd8+=) 12...a6 13.Ne4 (13.Nd7 Qd7 14.Ne4 Qe6 15.Nd6 cd6+/–) 13...Qe7 (better is 13...Be5!? 14.de5 Ne3 15.fe3 Be4+=) 14.Nd6+/– cd6 15.Nd7 Qd7 16.Bd3 Rc8 17.Qh5 Nf6 (17...g6 18.Qh4 Qe7 19.Qh6+/–) 18.Qg5+– Qg4? (better is 18...Qd8+–) 19.Qg4 Ng4 20.Bf5 Rc2 (20...Nf6 21.Bc8 Bc8+–) 21.Bc2 (21.Bg4?! Rb2 22.0–0 h5+/–) 21...Bg2 (21...0–0 22.0–0+–) 22.Rg1 Bf3 23.Rg3 Nh2 24.Rh3 1–0. Fritz 11 – foreverclever, internet, 2013.

3.d4 Nc6

4.a3 Be6 5.e3 (5.Nf3 Bg4=) 5...Qd6 (5...Bg4 6.Nf3=) 6.g3 (6.Bd3 Bg4 7.f3 Bh5=) 6...0–0–0 (6...Bf5 7.Nf3=+) 7.Bg2 (7.Bd3 Bg4 8.f3 Bh5=) 7...Bg4 (7...g5 8.Ne2=+) 8.Ne2 Be2 (8...e6!?=+) 9.Qe2+= g6 (9...e6 10.c4+=) 10.0–0 (10.c4 e6+=) 10...Bh6 (10...h5 11.c4 h4 12.cd5 Nd5 13.Nc3+=) 11.Nd2 (11.c4 dc4 12.Nc3 Qd7+/–) 11...a5 (11...Bg7 12.c4+/–) 12.b5 Na7 13.a4 (better is 13.c4+/–) 13...Qb4? (13...Bg7 14.c4 h5 15.Bc3+/–) 14.Rab1?? (better is 14.Ba3 Qc3 15.Be7+–) 14...Rd7 (better is 14...Qa4 15.c4 b6+/–) 15.Ba3?? (better is 15.c4+/–) 15...Qb1?? (better is 15...Qa3 16.Nf3 Rd6–+) 16.Rb1+– Rhd8 (16...Bg7 17.c4 e6 18.cd5 Nd5 19.Rc1+–) 17.c4 (17.Nf3 Ne4 18.Qe1 b6+–) 17...b6 (17...e6 18.b6 cb6 19.cd5 Nd5 20.Nc4+–) 18.cd5 (18.Qf3 Bg7+–) 18...Nd5 19.Bd5 Rd5 20.Be7 R8d7 21.Ba3 Bg7 22.Ne4 c6 23.bc6 Nc6 24.Rb6 Kc7 25.Qa6 f5 26.Rb7 Kd8 27.Qa8 (27…Nb8 28.Qb8#) 1–0. Mangoldt,H – Haufe,P, Berlin–ch U15, 1997.

4.a3 Bf5 5.e3 =+.

4.c3 e5 5.Nf3 (5.b5!? Na5 6.de5=) 5...e4–/+ 6.Nfd2 Bd6 7.e3 0–0 8.c4 (8.Be2 Be6=+) 8...Nb4–/+ 9.cd5 (9.a3!? Nd3 10.Bd3 ed3 11.Qb3–/+) 9...Nfd5 10.Bc4 (10.Nc4–+) 10...c6 (10...Qg5 11.g3 Qf5 12.Ba3–+) 11.0–0 Nd3 12.Bd5 cd5 13.Qb3 Qc7 14.Nc3? Bh2 15.Kh1 Be6 16.Nd5 Qd6?? 17.Ne4 Bd5 18.Nd6+= Bb3 19.Kh2 Bd5 20.Ba3+/– Rfd8 21.Rab1 Rd7 22.Kg3 b6? 23.Rfd1+/– Ba2 24.Rb5 Rad8 25.Rd3 Rd6 26.Bd6 Bc4 27.Bc7 Rd7 28.Re5+/– f6 29.Re8 Kf7 30.Rd8 Rc7 31.Rc3 b5 32.d5 b4? 33.Rc2 b3+/– 34.Rb2 Ke7= 35.Rh8 h6 36.Rh7?? Kd6 37.e4 a5 38.f4?? a4–+ 39.Rh8 Kc5?? 40.Rd8? a3–+ 41.d6 Rf7?? 42.Rd2–/+ Be6 43.Rd3?? a2–+ 44.Rc3 Kd4 45.Rc7 a1Q 46.Rf7 Qc3 47.Kh2 Bf7 48.d7 Be6 49.Rc8 Qc8! 50.dc8Q Bc8 (51.f5 b2–+) 0–1. I need chocolate... – dugmak, ChessWorld.net, 2005.

4.c3 Bf5 5.Qa4 =+.

3.d4 g6

4.Nf3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.d4 d5).

4.Nf3 Bg7 5.e3 c6 6.c4 Bg4 7.Nbd2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4).

4.g3 Bg7 5.Bg2 Qd6 6.Nh3 (better is 6.a3!?=+) 6...Qb4–/+ 7.Nc3?? (better is 7.Bc3 Qc4 8.Nf4–/+) 7…Qb2–+ (8.Na4 Qa3–+) 0–1. AndrewDev – pierre (2190), internet, 2007.

3.e3 b5

4.Bb5 c6 5.Ba4 e6 +/–.

4.Bb5!? Bd7 5.Be2 +/–.

4.d3 e5 5.a3 Bd6 6.Nf3 e4 (6...a5!?=) 7.de4+= Ne4 (better is 7...de4 8.Ng5 h6 9.Bb5 c6 10.Bf6 gf6 11.Ne4 Be5 12.Qd8 Kd8 13.Bc6 Nc6+=) 8.Qd5?? (better is 8.Bb5 c6 9.Bd3+/–) 8...Nf2 (better is 8...Bb4 9.ab4 Qd5 10.Bg7 Rg8–+) 9.Kf2 (better is 9.Qa8 Nh1 10.Qb8 0–0 11.Qa7 Bh2 12.Bb5 Bg3 13.Ke2 Bd6+–) 9...c6?? (better is 9...Bg3! 10.hg3 Qd5 11.Bg7 Rg8–/+) 10.Qd3 (10.Qe4 Qe7 11.Qe7 Be7 12.Bg7 Rg8+–) 10...0–0 11.Be2 a5 12.Re1 a4 13.Kg1 c5 14.Bc3 c4 15.Qd1 Bg4 16.Rf1 Nc6 17.Nd4 Be2 18.Qe2 Re8 19.Nc6 Qc8 20.Nd4 Ra7 21.Nf5 Bb8 22.Ng7 Be5 23.Ne8 Qe8 24.Be5 Qe5 25.Nd2 Qb2 26.Ne4 Re7 27.c3 Qe2–/+ (27...Qe2 28.Nf6 Kg7–/+) 0–1. Valpa – Sweendog, playchess.de, 2006.

4.Nf3 e6!? =.

4.Nf3 Bg4 5.Bb5+/– c6 6.Be2 (6.Ba4 e6 7.a3 a5+/–) 6...h5 (6...e6 7.a3+/–) 7.h3 (7.Nc3 Qc7+/–) 7...Bf3 8.Bf3 Nbd7 9.0–0 (9.Nc3 e6 10.a3 a5+/–) 9...h4 (9...e5 10.a3+/–) 10.a3 (10.Bf6 Nf6 11.c4 e5+–) 10...e5 11.c4! e4 (11...dc4 12.Bc6 Pinning (12.Bc6 Deflection)) 12.Be2+– dc4 (12...a5 13.ba5 Bd6 14.d3+–) 13.Bc4 Ne5?? (better is 13...a5+–) 14.Be5 Bd6 15.Bd4 (better is 15.d4 ed3 16.Bd4 a5+–) 15...Nd5 (15...a5 16.f3 ab4 17.fe4+–) 16.Bg7 (better is 16.Qg4!? Qe7 17.Qg7 Rf8+–) 16...Rg8 17.Qa4 Rg7 (17...Qd7 18.Bd5 cd5 19.Qd7 Kd7+–) 18.Qc6 Ke7 (18...Kf8 19.Qd5 Rc8 20.Qe4+–) 19.Qd5 Qg8 (19...Rc8+–) 20.Qe4 Kd7 21.Bb5 Kc7 22.Qc6 Kb8 23.Qd6 Kb7 24.Ba6 1–0. Bonetti,Shane – guest1382, ICC, 2002.

3.e3 Ne4

4.c4 dc4 5.Bc4 e6 6.a3 (6.Qf3!? Nd6 7.Be2=) 6...Nf2+= 7.Bb5 (7.Kf2 Qh4 Double attack) 7...c6 8.Kf2 cb5 9.Nc3 Bd7 10.Nf3 Be7 11.Rf1 0–0 12.Kg1 a6 13.d4 Bc6 14.e4 b6 15.Qd3 Bb7 16.Rad1 f6 17.d5 ed5 18.ed5 Bd6 19.Ne4 a5 (19...Bc8 20.Rfe1=) 20.Bc3+= (worse is 20.Qb5 Ba6 21.Qa4 Bf1 22.Rf1 Bf4–/+; 20.Nd6?! Qd6 21.Nh4 Qd7=) 20...Na6 21.ba5 (better is 21.Qb5!? Bf4 22.Rfe1=) 21...Nc5–/+ 22.Nc5 Bc5 23.Kh1 ba5 24.Rfe1 (24.Qb5!? Qc7 25.Qb3–/+) 24...Ba3 25.Qb5 Ba6 (25...Rf7 26.Nd4 a4 27.Ra1–/+) 26.Qa5 (26.Qa4 Qd6=) 26...Qa5 (better is 26...Bc4!? 27.Qd8 Rfd8–/+) 27.Ba5= Be2 (27...Rf7 28.d6 Rd7–/+) 28.Re2+= ½–½. Schwichtenberg,Juergen (1870) – Dietze,Otto (1800), Halle GER, 2011.

4.Nf3 e6 5.a3 Bd6 (5...a5 6.b5=) 6.Be2 (6.Bg7!? Rg8 7.Bb2+/–) 6...0–0 7.d3 Nf2? (better is 7...Ng5=) 8.Kf2+– Qf6?? (8...c5+–) 9.Bf6 gf6 10.Rf1 Nc6 11.Nbd2 Nd8 (11...a5 12.c3+–) 12.c4 b5 (12...c6 13.Kg1+–) 13.cb5 c5 14.bc5 Bc5 15.d4 Bd6 16.Qc2 Bb7 17.Bd3 f5 18.Rfc1 e5 (18...Kg7 19.Nb3+–) 19.de5 f4 20.ed6 Ne6 21.Bh7 Kh8 22.ef4 Nf4 23.Qf5 Rg8 24.Bg8 Kg8 (24...Rg8 25.Qf4 Kg7 26.Rc7 Rf8 27.Qg4 Kh6 28.Ne5 Bc8 29.Qf4 Kg7 30.Rf7 Kg8 31.Qg5 Kh8 32.Qg7#) 25.Qf4 (25.Qf4 Bc8 26.Ng5 Bd7 27.Qf7 Kh8 28.Qh7#; 25.Ng5 Nd3 26.Kg3 Kg7 27.Qf7 Kh6 28.Kh4 Nc1 29.Qf6#) 1–0. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

3.e3 h5

4.Bb5 Bd7 5.Bd3 e6 6.b5 Bb4 7.c3 Bc5 8.Nf3 g6 9.h4 Qe7 10.c4 dc4 11.Bc4 Rg8 12.a3 Ne4 13.d3 Nd6 14.Ng5 Nf5 (better is 14...Bb5!? 15.Bb5 Nb5+=) 15.Qf3 Bd6?? (better is 15...c6+=) 16.Qb7+– Bc6 (16...c6 17.Nh7 cb5+–) 17.bc6 Ne3 (17...Nh4 18.Qa8 Ng2 19.Kf1 Ne3 20.fe3 Qg5 21.Qb8 Ke7 22.Qg8 Qf5 23.Ke1+–) 18.Qa8 (better is 18.fe3 Bg3 19.Kd1 Bh4 20.Qa8 Qg5 21.Qb8 Qd8 22.Qa7 Bf6 23.Bf6 Qf6 24.Qc7 Qa1+–) 18...Qd8 19.fe3 Bg3 20.Kd1 Ke7 21.Qa7 (better is 21.Ne4 Qe8 22.Bf6 Kf8 23.Qa7 Nc6 24.Qc5 Ne7 25.Ng3 Qd7+–) 21...Kf8 22.Rf1 Nc6 23.Qc5 Ke8 24.Qc6 Kf8 25.Be6 Qd3 26.Kc1 Qe3 27.Nd2 Bf4 28.Nf7 Qd2+– 29.Kb1 Qd3 30.Ka2 Qd2 31.Rad1 Qe3 32.Rd8 Ke7 33.Qd7 1–0. Pekin Dragons – pieeater, ChessWorld.net, 2011.

4.Nf3 e6 5.a3 a5 6.b5 Nbd7 7.Nc3 Bd6 8.Be2 c5 9.bc6 (9.Ng5 Nb6+=) 9...bc6 10.Rb1 Ba6 11.Nd4 (11.Ng5 Be2 12.Qe2 0–0+=) 11...Be2 12.Qe2 Qc7 13.f4 0–0 14.0–0 g6 (14...e5 15.Nf5+=) 15.a4 (15.h3 Rfb8+=) 15...Rfb8+= 16.Nb3 Rb7 17.Na2 Ne4 18.Nc3 Nec5 19.Ba3 (19.Nc5!? Bc5 20.Ba1–/+) 19...Na4! 20.Na4 Ba3 21.Ra1 Bd6 22.Nc3 Rb4 (22...Be7 23.Ra2–/+) 23.Na2 (better is 23.Nc1–/+) 23...Rb7 (23...Rc4 24.d3 Ra4 25.Nc3 Ra1 26.Ra1–+) 24.Nc3–/+ Bb4 25.Na4 Rab8 26.Ra2 c5 (26...Kg7 27.e4–/+) 27.c4 Nf6 28.Rc1 d4! 29.ed4 cd4 30.g3 Ba3 31.Ra3 Rb3 32.Rb3 Rb3 33.Qf2? (better is 33.Qe5 Qe5 34.fe5–/+) 33...Qa7–+ 34.c5 (34.Qg2 h4! 35.gh4 Ra3–+) 34...Rb4 35.Nb6 Ne4 36.Qg2 (36.Qe1 Nc5! 37.Rc5 Qb6–+) 36...d3 37.Qf3 (37.Qf1 Rb3 38.Qe1 Nc5–+) 37...Nc5! 38.Rc5 Rb6 39.Rc8 (39.Qe3 a4 40.Rb5 Rb7 41.Qa7 Ra7–+) 39...Kh7 40.Qe3 (40.Qa8 Rb1 41.Kg2 Qa8 42.Ra8 Rb2–+) 40...Rb1 41.Kf2 0–1. marektheim – gibson, internet, 2015.

4.Nf3 h4 5.c4 Bg4 6.h3 Be6 7.Nd4 Bc8 8.cd5 Qd5 9.Nc3 Qg5 10.Rc1 e6 (10...c6!? 11.Nf3 Qg6+/–) 11.Ncb5 Bd6?? (better is 11...Na6 12.Nc7 Nc7 13.Rc7 Qd5+–) 12.Nd6+– Ke7 13.Rc7 Kd6 14.Rf7 Bd7 15.Nf3 Qd5 16.Be5 Kc6 (16...Qe5 17.Ne5 Ke5 18.Qa1 Kd6 19.Qd4 Kc7 20.Qc3 Nc6+–) 17.Qc2 Kb6 (17...Qc4 18.Qc4 Kb6 19.Qc5) 18.Qc7 1–0. Fritz 11 – quarjan, internet, 2014.

3.Nf3 c6

(--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6).

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3).

4.e3 e6 5.a3 Nbd7 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.e3 Bf5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6).

4.e3 Bf5 5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.e3 Bg4 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.e3 Bg4 5.c4 Nbd7 6.Qb3 e6 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

4.e3 Bg4 5.c4 e6 6.Qb3 Nbd7 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

4.e3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.e3 Bg4 5.Be2 Nbd7 6.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.c4 Nbd7 6.Be2).

4.g3 g6 5.Bg2 Bg7 6.d3 0–0 7.Nbd2 Bg4 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6 7.d3 Bg4 8.Nbd2).

3.Nf3 Bd7

4.a3 a5 =.

4.e3 e6 5.a3 a6 (5...Bd6 6.Be2=) 6.c4 (6.Be2 c5=) 6...dc4 7.Bc4 b5 8.Bb3 (8.Be2 a5=) 8...Be7 (8...a5 9.ba5 Bd6 10.d3=) 9.0–0 (9.Ne5 a5=) 9...0–0 (9...a5 10.ba5 Ra5 11.Ne5=) 10.Nc3 (10.Qc2 a5=) 10...Bc6 (10...a5 11.Qe2=) 11.Rc1 Nbd7 12.Nd4 Bb7 13.Nce2 (13.Be6!? fe6 14.Ne6=) 13...c5=+ 14.bc5 Nc5 15.d3 Nb3 (15...Qd7 16.e4=+) 16.Nb3 Rc8 17.Qd2?? (better is 17.Bf6 Rc1 18.Qc1 Bf6 19.Nc5=+) 17...Qd5–+ 18.e4 Qb3 19.Ra1 (19.Nd4 Qa4 20.Nc2–+) 19...Rc2 20.Qa5 (20.Qf4 Rb2 21.Qc7 Re2 22.Qe7 Ba8–+) 20...Bd8 (20...Qb2 21.Rfb1 Qe5 22.Qb6–+) 21.Qe1 (21.Nd4 Qb2 22.Qb4 Ba5 23.Qb2 Rb2–+) 21...Qb2 22.Rb1 Qe5 23.f4 Bb6 24.Kh1 Qc7 25.Rb3 Ra2 26.Rc3 Qd7 27.Nc1 Ra1 28.Qe2 Rc8 29.Rc8 Qc8 30.Qb2 Bd4 31.Qd2 Qc3 32.Qd1 Be3 0–1. Scholz,Christoph – Kreuter,Sebastian, Baden–ch U15, 1996.

4.g3 g6 5.Bg2 e6 6.Ne5 Ba4 7.Nc3 Bc6 8.a3 Bg7 9.Nc6 Nc6 10.0–0 0–0 11.d4 Ne7 12.e3 c6 13.Ne2 Nf5 14.Rc1 Nd6 15.Qd3 Nc4 16.Ba1 a5 17.c3 (better is 17.Bc3!?+=) 17...Na3–/+ 18.ba5 Ra5 19.Nf4 Nc4 20.Rfd1 Ra2 21.Qb1 Ra7 22.Bf1 Nd6 23.c4 Nfe4 (23...dc4 24.Bc4 Nc4 25.Rc4–+) 24.cd5 ed5 25.Qb4 Nb5?? (better is 25...Qe7 26.Rc2 Rfa8–+) 26.Bb5= cb5 27.Qb5 Ng5 (27...Ra2 28.Qb3 Rf2 29.Qb7 Ra2 30.Nd5 Nf2 31.Ne7 Kh8+=) 28.Nd5+/– (28.Qd5?! Nh3 29.Kf1 Qd5 30.Nd5 Ra2 31.Ne7 Kh8=) 28...Ra5 29.Ne7! Kh8 (29...Qe7 30.Qa5 Deflection) 30.Qb7 Re8?? (30...Ra2 31.Kg2 Bf6+–) 31.Rc8 Ra1 (31...Qe7 32.Qe7 Rc8+–) 32.Ra1 Nf3 33.Kg2 0–1. Jokmin,Alex – Bester,Kazimierz, RN–2010–0–00320, 2010.

3.Nf3 Nbd7

(--> 1.b4 d5 2.Bb2 Nd7 3.Nf3 Ngf6).

4.e3 c6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

4.e3 e6 5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

3.Nf3 Ne4

4.d3 Nf6 5.Nbd2 Nc6 6.b5 Nb4? 7.a3+– 1–0. Wall,Bill – Guest7724, internet, 2001.

4.e3 Nc6 5.a3 e6 6.d3 Nd6 7.Nbd2 b6 8.c4 dc4 9.Nc4 f6 10.Nd6 Bd6 11.Be2 Bb7 12.0–0 Qd7 13.Rc1 0–0–0 14.d4 e5? (better is 14...Ne7!?+/–) 15.de5 fe5 16.Bb5 Qf5?? (better is 16...a6 17.Bc6 Bc6 18.Ne5 Be5 19.Be5 Qd1 20.Rfd1 Rd1 21.Rd1 Re8+/–) 17.Bc6+– (17.Rc6?! a6 18.Ba4 b5+–) 17...Bc6 18.Rc6 Bb4 19.Qc1 (19.Be5 Rd1 20.Rc7 Kb8 21.Rd1 Bd6 22.Bd6 Rd8 23.Rd7 Kc8 24.Rd8 Kd8 25.Bf8 Ke8 26.Bg7 Qc2+–) 19...Bc5 (19...Bd6 20.Rd1 Kb8 21.Rc4+–) 20.Rc5 bc5 21.Qc5 Qd3 (21...Rhe8 22.Ne5 Rd2 23.Bd4+–) 22.Be5 (worse is 22.Qe5 Rd7+–) 22...Rd7 23.Qa7 Kd8 1–0. Fournier,Frederic – ersino, Active, 2008.

3.f4 Bg4

4.Nf3 e6 5.b5 Bf3 6.ef3 Bd6 7.g3 Nbd7 8.Nc3 h5 9.a4 0–0 10.Kf2 h4 11.d4 c5 12.bc6 bc6 13.Rb1 Rb8 14.Bd3 Rb4 15.Ne2 Nb6 16.c3 Ra4 17.Rg1 Qc7 18.Bc1 Ra2 19.Qb3 Ra5 20.gh4 c5 Black intends c4 21.Qd1 Nh5 22.Rg4 c4 23.Bc2 Nd7 24.Qd2 Ndf6 0–1. pierred – aspasio, net–chess.com, 2013. (=1.f4 d5 2.b4 Nf6 3.Bb2 Bg4)

4.h3+= Bf5 5.Nf3 e6 +=.

4.h3+= Bh5?? 5.g4+/– Ng4? (better is 5...Bg6!? 6.f5 Qd6+/–) 6.hg4+– Bg4 7.Nf3 (7.Bg2 Qd6 8.Be5 Qg6+–) 7...f6 (7...Bf3 8.ef3 a6 9.Qe2+–) 8.Nc3 (8.e3 Qd7+–) 8...e5 9.fe5 Nc6 10.Bh3 (10.e6 Bb4 11.Bh3 Bh3 12.Rh3 a6+–) 10...Bf3 11.ef3 Ne5 12.f4 Nc4 13.Qe2 Be7 14.0–0–0 Nb2 15.Kb2 Qd6 16.Nb5 Qb4 17.Ka1 0–0 18.Be6 Kh8 19.Rh7!! Kh7 20.Qh5# 1–0. pierre – oppolj, internet, 2010.

3.f4 g6

4.Nf3= Bg7 5.e3 0–0 6.a4 Bg4 (6...Qd6 7.b5+=) 7.Be2= Ne4 (7...a6 8.0–0=) 8.Bg7 Kg7 9.0–0 b6 (9...e6 10.c3=) 10.Nc3 Nc3 11.dc3 c5 12.bc5 bc5 13.c4 d4 (13...e6!?+=) 14.h3 Bf5 15.ed4 cd4 (15...Na6 16.c3+/–) 16.Nd4 Bc2?? (better is 16...Be4+/–) 17.Nc2+– (17.Qc2?! Qd4 18.Kh2 Nc6=) 17...Qb6 (17...Nc6 18.Qd8 Rfd8 19.Rfd1+–) 18.Qd4 Qd4 19.Nd4 Na6 20.Nc6 e6 21.Rab1 Nc5 22.a5 a6 23.Kf2 Ne4 24.Ke3 Nc3 25.Rb7 Ne2 26.Ke2 Rfc8 27.Ne5 Rc5 28.Nf7 Kf6 29.Nd6 Ra5 30.Rf7# 1–0. rancho – jeruzal, internet, 2010.

4.Nf3 Bg7 5.e3 0–0 6.Be2 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2).

4.Nf3 Bg7 5.g3 0–0–/+ 6.Bg2 c6 7.0–0 a5 8.ba5 Qa5 9.e3 Bf5 10.Bc3 Qa4 11.d3 Nbd7 (11...c5 12.Qd2–/+) 12.Nd4 (12.Qd2 c5–/+) 12...Bg4 13.Qe1 c5 14.Nb3 c4 15.dc4 Qc4 16.h3 Be6 (16...Bf5 17.Nd4–/+) 17.g4+= Nc5 18.Bd4 Nce4 (18...b6 19.f5 gf5 20.gf5=) 19.c3 (19.N1d2 Qc7+=) 19...Bd7 (19...Rfd8!?–/+) 20.N1d2+= Qd3?? (better is 20...Qc8 21.c4 Nd2 22.Qd2 dc4= (worse is 22...Qc4 23.Nc5 Bc6 24.Rfc1=)) 21.g5+/– Nh5 22.Ne4 de4 23.Nc5 Qb5 24.Rb1 Qc6 25.Be4 (25.Rb7 Bf5 26.Re7 Qd6+–) 25...Qd6 26.Nb7 Qa3 27.Nc5 Bh3 28.Rf2 Rab8+/– 29.Kh2 Bd4 30.ed4+/– Rb1 31.Bb1 Bc8 32.Qd2 e6 33.Bd3 Rd8 34.Ne4 Qe7 35.Be2 f5 36.Bh5 fe4 37.Bd1 Bb7 38.Qe3 Qf7 39.Bb3 Qf5 40.Qh3 Qh3 41.Kh3 Kf7 42.Kg3 Rc8+/– 43.Rc2 h6?? 44.gh6+– Rh8 45.Rh2 Kf6 46.Kf2 Rh7 47.Ke3 Kf5 48.c4 g5 49.Rh5 Kg6 50.Rg5 Kh6 51.d5 ed5 52.cd5 Rc7 53.Ke4 Rc1 54.Ke5 Re1 55.Kf6 Rf1 56.f5 Ba6 57.d6 Bb5 58.Bf7 Rh1 59.Rg8 Kh7 60.Rb8 Rh6 61.Bg6 1–0. Jaramillo,Carlos Orlando (1945) – Castellanos,Alvaro (1655), Championship Nacional Amateur Ab, 2009.

3.g3 e5

4.Be5 Bb4 5.Bg2 Nc6 6.Bb2 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.g3 Nc6 5.Bb2 d5 6.Bg2).

4.Be5 Bb4 5.Bg2 Nc6 6.Bb2 0–0 7.Nf3 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.Nf3 Nc6 5.Bb2 0–0 6.g3 d5 7.Bg2).

4.Be5 Nc6 5.Bf4 =+.

4.Be5 Nbd7 5.Bb2 (5.Bc3!?=) 5...Bb4=+ 6.Bg2 c6 7.Nf3 Qe7 (7...0–0 8.0–0=+) 8.0–0 (8.a3 Bc5=+) 8...h6 (8...0–0 9.a3 Bd6 10.Re1=+) 9.a3 Bc5 10.d3 (10.d4 Bd6=) 10...Nb6 (better is 10...0–0=+) 11.Re1?? (11.Nbd2 0–0=) 11...Be6?? (better is 11...Bf2 12.Kh1 Be1 13.Qe1 0–0–+) 12.e4 0–0–0 13.d4 de4–/+ 14.Ne5 Bf5 15.c3 Na8 16.Nd2 Bd6 17.Ne4 Be5 18.Nf6 gf6 19.f4 Nc7 20.fe5 fe5 21.Re5 Qf6?? 22.Qe2 Be6 23.Rf1 Qg7 24.a4 Rdg8? 25.c4+– Bg4 26.Qf2 Be6? 27.d5 cd5 28.Re6! Qg4 29.Re7 Rh7 30.Rf7 Rf7 31.Qf7 h5 32.cd5 Rg7 33.Bg7 (33...b6 34.Qg8 Kb7 35.d6 Ka6 36.dc7 Qg7 37.Qc4 Ka5 38.Qb5#) 1–0. sighBorg – dunk, internet, 2007.

3.g3 Bf5

4.d3 e6 5.a3 Be7 6.Bg2 0–0 7.Nf3 Nc6 (7...a5 8.b5=+) 8.Nbd2 (8.0–0 Qd6=) 8...Bg4 9.c4 dc4 10.Nc4 Qd7 (10...a6 11.Ne3 Bh5 12.0–0=) 11.0–0 (11.Nfe5 Ne5 12.Ne5 Qb5+=) 11...Rad8 (11...Bf3 12.Bf3 Rfb8 13.Rc1+=) 12.Rc1 (12.b5 Nb8+=) 12...Bf3 13.Bf3 b6? (13...Nd5 14.b5 Nb8 15.Qa4+=) 14.Ne3 (14.Nb6 ab6 15.Bc6 Qd6+–) 14...Nd5 15.Nc4?? Bg5 16.e3 Qe7 17.Re1 Nb8 18.h4 Bf6 19.Bf6 Qf6 20.d4 a6 21.Ne5+/– c5 22.bc5 bc5 23.Rc5 Nd7 24.Nd7+– Rd7 25.Bd5 Rd5+/– 26.Rc6 a5 27.Qd2 Qe7 28.Rc3 Qd7 29.Rec1 Rd8 30.Qc2 g6 31.Rc7 Qa4?? 32.Qa4+– (32...h6 33.R1c5+–) 1–0. coloplayah (2140) – sgalahad (2015), net–chess.com, 2006.

4.Bg2 Qd7 5.h4 e6 6.a3 c6 (6...Be7 7.Nf3+=) 7.Nf3 Bd6 8.Be5 (8.Bf6 gf6 9.Nc3 e5+=) 8...Qc7 9.d4 Nbd7 10.Bd6 Qd6 11.Nbd2 b5 12.Nb3 0–0 13.Nc5 Ne4?? (better is 13...Nc5 14.bc5 Qc7+=) 14.Nd7+/– Qd7 15.Ne5?? (better is 15.g4+–) 15...Qd6–/+ 16.g4 f6 17.gf5 fe5 18.Be4 de4 19.de5 Qe5–+ 20.fe6 e3 21.0–0 ef2 22.Rf2 Rf2 23.Kf2 Rf8 24.Kg2 Qe4 25.Kh3 Qe6 26.Kg3 Qe3 27.Kg2 Rf2 28.Kh1 Qh3 29.Kg1 Qg2 0–1. Simic,Stefan – Ugrenovic,Bozidar, Belgrade Radnicki op, 2006.

4.Bg2 e6 5.a3 c5 6.bc5 Bc5 7.Nf3 (7.e3 0–0–/+) 7...0–0 (7...Qb6 8.Bf6 Bf2 9.Kf1 gf6 10.e3=) 8.0–0+= Nc6 9.d3 Qd7 (9...Ng4 10.Qe1+=) 10.Nbd2 Rfe8 11.c4 d4 (11...Qe7 12.Qa4=) 12.Nb3 Bb6? (better is 12...Qd6!?=) 13.c5+/– Bc7 14.Nbd4 e5 15.Nf5 Qf5 16.e4 (16.Qb3 Rab8+/–) 16...Qd7 17.Qc2 Rad8 18.Rad1 Nd4 (18...Qe6 19.Qa4+/–) 19.Nd4 ed4 20.Qc4 (20.f4 Ba5+/–) 20...Re5 (20...b5!? 21.Qc2 Qe6+/–) 21.f4+– Re6? (better is 21...Rh5+–) 22.Bh3 Rde8 (22...Kh8 23.e5 Ng8 24.Qb4+–) 23.Be6 Re6 24.Qd4 Qb5 (24...Qc6 25.Rc1+–) 25.Qb4 Qc6 26.a4 (26.Bf6 Rf6 27.d4 b6+–) 26...b6 27.cb6 (27.Bd4 Qd7+–) 27...Bb6 28.Bd4 Ng4 (28...Qd7 29.Bb6 Rb6 30.Qc4+–) 29.Bb6 ab6 30.Rfe1 (30.Rc1 Qd7+–) 30...Rh6 (30...Nf6 31.Rc1 Qa8 32.Rc7+–) 31.Rc1 Qd7 32.Rc2 (better is 32.Qc3 g5 33.Re2 Rd6 34.Qc8 Kg7+–) 32...Rd6 (32...Re6+–) 33.Qd6! Qd6 (33...Qd6 34.Rc8 Decoy) 34.Rc8 Qf8 35.Rf8 Kf8 36.e5 (36.Rb1 Nf6 37.Rb6 Ne8+–) 36...Ke7 37.h3 1–0. zabazaba (1670) – keope (1640), gameknot.com, 2013.

4.Bg2 e6 5.Nf3 h6 6.d3 (6.a3 c5=) 6...Nbd7 (6...Bb4 7.Nbd2=+) 7.0–0 Bb4 8.Ne5 (8.c4!?=+) 8...Ne5–/+ 9.Be5 Bd6 10.f4 (10.Bb2 Qd7–/+) 10...0–0 (10...Be5 11.fe5 Ng4 12.Qc1–/+) 11.d4 (11.h3 Be5 12.fe5 Nd7–/+) 11...c5 12.c3 Ne4 13.Nd2 (13.Qb3–+) 13...Nc3 14.Nf3?? (14.Qe1–+) 14...Nd1 15.Rfd1 (15.Rad1 Rc8–+) 15...Be5 16.Ne5 f6 17.Nf3 cd4 18.Nd4 Be4 (better is 18...Qb6 19.e3 g6 20.h3–+) 19.Bh3 (19.Be4 de4 20.Ne6 Qb6 21.Nd4 e3–+) 19...Qb6 (19...e5 20.Nf3–+) 20.e3 (20.Be6 Kh7–+) 20...f5 (better is 20...e5 21.Nf5–+) 21.Rab1 (21.a4 Rac8–+) 21...Qa5 (better is 21...Bb1 22.a4–+) 22.Rb7 (22.Rb2 Qa3 23.Re2 Rac8–+) 22...Rab8 23.Re7 (23.Rb8 Rb8 24.Bf1 Qa2–+) 23...Rb6 (better is 23...Qa3 24.Re1 Qe7 25.Nc6–+) 24.Ne6 (24.Re6 Qa3 25.Re1 Rb1 26.Rb1 Qe3 27.Kf1 Qd3 28.Ne2 Qb1 29.Kf2 Qh1–+) 24...Re6 (better is 24...Qa3 25.Rg7 Kh8 26.Re1 Re6 27.Rc7–+) 25.Re6 Qa4 (25...Qc3 26.Re4 de4 27.Kh1–+) 26.Ra1 Qa3 27.Bg2 (27.Re1 Qa2 28.Bf1–+) 27...Qe3 28.Kh1 Bg2 29.Kg2 Qe6 30.Rc1 Qe2 31.Kh3 Re8 32.Rh1 Qg4 33.Kg2 Re2 34.Kf1 Qf3 35.Kg1 Qg2# 0–1. IIq – shapeless, Live Game Caissa's Web, 2004.

3.g3 g6

4.Bg2 Bg7 5.e3 0–0 6.d3 a6 7.Ne2+= c6 (7...Nc6 8.a3+=) 8.Nd2 Qc7 (8...a5 9.a3=) 9.Nb3 Nbd7 10.0–0 Ne8 11.Bg7 Ng7 12.c4 dc4 13.dc4 c5 (13...Ne5!?=) 14.bc5+/– Nc5 15.Nf4 Rb8 16.Nd5 Qd6 17.e4 Nb3 18.ab3 b5 (18...Be6 19.Re1+/–) 19.e5!+– Qe5 (19...Qd8!?+–) 20.Re1 Qd6?? (20...Qg5 21.f4 Qg4 22.Ne7 Kh8+–) 21.Ne7 Kh8 (21...Qe7 22.Re7 bc4 23.bc4 Nf5+–) 22.Qd6 Be6 23.Qa6 (23.c5!? Rbd8 24.Qa6 Rd7+–) 23...bc4 24.bc4 Nh5 25.Bd5 Bd5 26.cd5 Kg7 27.g4 Nf6 28.g5 (better is 28.Qc4 Rbd8+–) 28...Ne8 29.Nc6 Rb3 30.Re8! Re8 31.Ne5! Re5 (31...Re5 32.Qf6 Mate attack) 32.Qf6 Kf8 33.Ra8 (33.Qe5 f5 34.Ra8 Rb8 35.Rb8 Kf7 36.Qc7) 33...Re8 34.Qh8 Ke7 35.Qe8 Kd6 36.Rd8 Kc5 37.Rc8 Kd4 38.Qh8 Ke4 39.Rc4 Kf3 40.Qf6 Ke2 41.Qe5 Kd2 42.Qd4 Rd3 43.Qb2 1–0. Campos,Westerley B (1725) – Cerqueira,F De Assis (1800), Brasilia BRA, Terra Viva Open, 2014.

4.Bg2 Bg7 5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 d5 5.Bg2).

4.Bg2 Bg7 5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5).

4.g4 Bg4 5.Bg2 e6 (5...c6 6.a3–/+) 6.Nf3 (better is 6.a3–/+) 6...Nfd7?? (better is 6...Bb4 7.c4 c6–+ (< 7...dc4 8.Qa4 Nc6 9.Ne5+–)) 7.Bh8+– Bh6 (7...Bb4 8.h3 Bf3 9.Bf3+– (9.ef3?! f6 10.Bg7 Qe7+–)) 8.Bb2 Bf3 9.Bf3 Qg5 10.c4 Nc6 11.cd5 Nce5 12.e3 Nf3? 13.Qf3 c6 14.de6 fe6 15.Bd4 a6 16.Nc3 Qf5 17.Ke2 0–0–0 18.Qf5 ef5 19.Rac1 Re8 20.a4 Kb8 21.b5 c5 22.Bc5 Nc5 23.ba6 ba6 24.Rb1 Kc7 25.Rhc1 Kc6 26.a5 f4 27.Na4 Re5 28.Rb6 Kc7 29.Nc5 Rc5 30.Rc5 Kd7 31.Ra6 fe3 32.de3 Bf8 33.Rb5 Be7 34.Rab6 (34...Kc7 35.Rb7 Kc6 36.R5b6 Kd5 37.Re7 Kc4 38.Rc7 Kd5 39.Rh7 Kc4 40.Rc7 Kd5 41.Kd3 g5 42.Rg7 g4 43.Rg5; 34.Rb7 Ke8 35.Raa7 Kf7 36.Re7 Kf6 37.Rh7 Kf5 38.a6 Ke6 39.Rae7 Kd6 40.a7 Kc5 41.Rc7 Kd5 42.a8Q Ke6 43.Rc5 g5 44.Qc6) 1–0. coloplayah (1935) – jgaddy (1625), net–chess.com, 2005.

3.h3 e6

4.a3 =+.

4.e3 Bb4 5.a3 Bd6 6.Nf3 Nbd7 7.d4 Ne4 8.g3 Qf6 9.Bg2 Ng3 (9...0–0–/+) 10.Rg1? (better is 10.fg3 Bg3 11.Kd2+=) 10...Ne4–+ 11.Nbd2 0–0 12.Qe2 Nd2 13.Nd2 Qe7 14.e4 de4 15.Be4 Nf6 16.d5? (better is 16.Qf3–+) 16...ed5 17.Bd5 Qe2 (17...Nd5?? 18.Rg7 Kh8 19.Rf7 Kg8 20.Qe7 (20.Re7?! Ne7 21.Ne4 Rf7+–) 20...Be7 21.Rg7 Kh8 22.Re7 Rf6 23.Re5+– (23.Bf6?! Nf6 24.h4 Nd5 25.Re8 Kg7+–)) 18.Ke2 Re8 (18...Nd5?? 19.Rg7 Kh8 20.Rg8 Kg8 21.Rg1 Bg3 22.Rg3 Bg4 23.Rg4) 19.Kf1 Be5 20.Be5 Re5 (20...Nd5?! 21.Rg7 Kf8 22.Bd4–+; worse is 20...Bh3 21.Bg2 Bg2 22.Kg2 Re5 23.Rge1–+) 21.Bf3 (21.Bg2–+) 21...Bh3 22.Bg2 Bg2 23.Rg2 Rae8 24.Rb1 b5 25.Nf3 Rc5 26.Nd4 Rc4 27.Nb5 (27.Rb4 Rb4 28.ab4 a6–+) 27...a6 (27...Rc2?! 28.f3 Rc4 29.Na7–+) 28.Na7 Rc2 29.f3 Rg2 (better is 29...Rc3!? 30.a4–+) 30.Kg2 h5 31.Nc6 Re2 32.Kg3 Re3 33.a4 Ra3 0–1. jplayer (2020) – mpopp (2000), net–chess.com, 2013.

3.a3 a5

4.b5 a4 5.e3 Bf5 (5...e6 6.Nf3=) 6.c4 (6.Nf3 e6=) 6...e6 7.cd5 Nd5 8.d3 Bg6 9.e4 Nb6 10.h4 (10.Nf3 f6=) 10...f6 (10...h5 11.Be2=) 11.h5 Bf7 12.d4 c5 (12...Be7 13.Nf3=) 13.bc6 Nc6 14.Nf3 h6 15.Nbd2 (15.Bb5 Bd6=) 15...Bd6 16.Bd3 0–0 17.Qe2 White intends e5 17...Bc7 18.Rc1 Ra5 19.g4 Qd7 20.e5 Nd5 (20...fe5 21.Qe4 Rd8 22.Qh7 Kf8 23.Qh8 Bg8 24.g5+/–) 21.ef6 (better is 21.Qe4!? f5 22.gf5 ef5 23.Qf5 Qf5 24.Bf5+/–) 21...gf6= 22.Ne4 Qe7 23.Bb1 (23.Nc5 Nf4 24.Qe4 Nd3 25.Qd3 Bf4=) 23...Nf4 24.Qc2 (24.Qd2 Rd5=) 24...Be8 (24...f5 25.gf5 ef5 26.Rg1 Kh7 27.d5 Bd5 28.Rg7 Qg7 29.Bg7–+) 25.Kf1 (25.Nc5 Bd6 26.Qe4 e5=) 25...Qg7 (25...Rf7 26.Rg1=) 26.Ba2 Kh8 (26...Qg4? 27.Rg1 Bh5 28.d5 (28.Rg4?! Bg4 29.Ng1 Rh5+–) 28...ed5 29.Nf6 (29.Rg4?! Bg4 30.Nd4 Be5 31.Nc6 bc6 32.Be5 fe5+/–) 29...Rf6 30.Bf6 (30.Rg4?! Bg4 31.Bf6 Bf3+/–) 30...Qg1 31.Ng1+–) 27.Rg1 Rb5 (27...Nh3 28.Rg2=) 28.Nc5 Nd8 29.Nh4 (29.Bc4 Nh3 30.Rg2 Rb6=) 29...Rg8 (29...Bd6 30.Bb1+=) 30.Ng6 Ng6 ½–½. Cirulis,Ilmars (1905) – Faust,Dieter (1830), FICGS, 2016.

4.b5 Qd6 5.Nf3 Nbd7 6.e3 (6.d4 Nb6=) 6...e5=+ 7.d4 e4 8.Nfd2 Be7 9.c4 c6 10.Be2 (10.cd5 cd5 (< 10...Qd5 11.Nc3 Qe6 12.Bc4+/–) 11.a4 Qb6=) 10...0–0 (10...cb5 11.cd5 0–0 12.Bb5+=) 11.Nc3 Qe6 12.Rc1 Rd8 (12...Qf5 13.c5=) 13.Qb3 (13.cd5 cd5 14.0–0 Bd6=) 13...Qf5 14.cd5 (14.0–0 Qg5=) 14...cd5 15.Na4 Qg6 16.g3 (16.0–0 Bd6=) 16...Bd6 17.f4 ef3 18.Bf3 Ne4 19.Ne4 (19.Rf1 Ndf6 20.Nb6 Bh3=+) 19...de4 20.Bg2 Nf6 21.Nc3 (21.Nb6 Be6 22.Qc2 Rab8=+) 21...Ng4 (21...Be6 22.Qc2 Rac8 A) 23.Be4? Ne4 24.Qe4 Rc3 25.Qg6 Rc1 (25...fg6? 26.Rc3 Bd7 27.b6+–) 26.Bc1 hg6–+; B) 23.0–0=+) 22.Be4= Qh6 23.Ne2 (23.Nd1 Nh2 24.g4 Bg4 25.Bb7 Bg3 26.Kd2 Rab8–+) 23...Re8 24.Rf1 (24.Bd5 Re3 25.Rc3 Be6–/+) 24...Be6 25.Qd3 Re7 (25...Ne3 26.Rf3 Ng2 27.Kf1 Qh2 28.Ng1–/+) 26.Rc3 Qh2 27.Qb1 (27.Kd2 h6 28.d5 Bd7–/+) 27...Rae8 28.Rh1 Qf2 (28...Bg3?! 29.Kd2 Qf2 30.Bh7 (30.Rh7?? Bc4 31.Qh1 Qe2 32.Kc1 Qf1 33.Qf1 Bf1–+) 30...Kf8 31.Be4=) 29.Kd2 (Now all is on h7) 29...Bc4! 30.Bh7 (30.Rc4 Qe3) 30...Kf8–+ (With the decisive threat Rxe3) 31.Qe1 Qe1 32.Re1 Ne3 33.Kc1 Ng2 (34.Rg1 Bd5–+ (34...Bb5?! 35.Rg2 Re2 36.Re2 Re2 37.Bc2–/+)) 0–1. Baer,Werner – Rushton,Darren, Tigerschachclub, 2002.

4.b5 e6 5.e3 Nbd7 6.Nf3 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 c5 6.e3 Nbd7).

4.b5 Bf5 5.Nf3 Nbd7 6.Nh4 Be6 7.e3 g6 8.Nf3 Bg7 9.Be2 0–0 10.0–0 c6 11.h3 Qc7 12.a4 Rac8 13.Nd4 cb5 14.Bb5 Ne4 15.Na3 Qd8 16.Be2 Nb6 17.Ne6 fe6 18.Bg7 Kg7 19.Nb5 e5 20.d4 ed4 21.ed4 Rc6 22.Bd3 Rff6 23.Qc1 Qd7 24.c3 Nd6 25.Nd6 Qd6 26.Re1 Rc7 27.Ra2 e6 28.Qb2 Rf8 29.Ra3 Rff7 30.Rb3 Na4 The backward pawn on c3 becomes a target 31.Qa1 Nb6 32.Qa5 Nd7 33.Re2 Nb8 34.Qa1 Nc6 35.Qe1 Rce7 36.Bb5 Rf8 37.Re3 Rfe8 38.Bf1 Rf8 39.Rb5 Rff7 40.h4 Na7 41.Rb1 Nc6 42.g3 Rf6 43.Rb6 Qc7 44.Rb2 Qc8 45.Bh3 Nd8 46.f4 Qc7 47.h5 Qd7 (47...gh5!? 48.Qe2 Rh6+=) 48.Bg4+/– Re8 49.Rh2 Qc6 50.h6 Kg8 51.Ra2 Kf8 52.Kg2 Nf7 53.Rae2 Nd8 54.Qh1 Kg8 55.Qh4 Rff8 56.Qg5 b6 57.Bh3 Qd7 58.f5! ef5 59.Bf5! Qf7 (59...Qf5 60.Re5 Double attack (60.Re8 Deflection; 60.Re5 Decoy; 60.Re8 Overloading); 59...Rf5 60.Re8 Mate attack) 60.Re8 Re8 61.Re8 Qe8 62.Bg4 Nf7 63.Qd5 Kf8 64.Be6 Nh6 65.g4 Nf7 66.Bf7 Qf7 67.Qf7 Kf7 68.g5 Ke6 69.c4 Kf5 70.c5 bc5 (70...b5 71.Kf3 b4+–) 71.dc5 Ke6 72.Kf3 Kd5 73.Kf4 Kc5 74.Ke5 1–0. wilfried (2335) – the_great_omni (2265), gameknot.com, 2015.

4.b5 Bf5

5.Nf3 Nbd7 6.Nh4 Bg6 7.Ng6 hg6 8.e3 Nb6 9.Be2 e6 10.Bd4 Bd6 11.h3 c5 12.bc6 bc6 13.Bc3 Na4 14.Bf6 Qf6 15.d4 Qg5 16.g3 0–0 17.c4 Nb2 18.Qc1 Nc4 19.Bc4 dc4 20.Nd2 c5 21.Qc4 Bg3 22.fg3 Qg3 23.Kd1 cd4 24.Qd4? Rfd8–+ 25.Qe4 Qf2 26.Ra2 Rab8 27.Kc1? Rbc8 28.Kd1 e5! 29.Rb2 f5 30.Qb7 Rc3 31.Rc2 a4 32.Qb5 Qf3 33.Kc1 Qh1 34.Kb2 Rc2 0–1. kamret (2210) – zinga (2385), GameColony.com, 2003.

5.Nf3 e6 6.Nh4 Bg6 7.e3 Nbd7 8.Be2 Bd6 9.h3 Nc5 10.a4 Nh5 11.Nf3 0–0 12.0–0 Nf6 13.Nh4 e5 14.Ng6 hg6 15.d3 Qd7 16.Nd2 Qf5 17.Qb1 Ne6 18.Qa2 Rad8 19.Rad1 Ng5 20.Rfe1 Rfe8 21.Ba3 Ne6 22.c3 Ba3 23.Qa3 d4 24.e4 Qf4 25.cd4 Nd4 26.Qc3 Qh6 27.Bf1 Re7 28.Qa5 Nc2 29.Qc3 Ne1 30.Re1 Nh5 31.Nf3 Qf4 32.a5 Qf6 33.Qa3 White plans a6 33...Qd6 34.Qd6= cd6 35.d4 Nf6 36.a6 ed4 37.Nd4 Re4 38.Re4 Ne4 39.b6 Nc5 ½–½. Degterev,Pavel (2275) – Zeram,Alexis (1765), CP–2008–P–00062, 2008.

5.Nf3 h6 6.e3 e6 7.Be2 Be7 8.0–0 0–0 9.c4 c5 10.d3 Nbd7 11.Nbd2 Qc7 12.a4 b6 13.h3 Bg6 14.Qb3 Rac8 15.Rac1 Rfd8 ½–½. Woelfelschneider,Peter (2220) – Van Seben,Edgar (2380), WC–2013–S–00007, 2010.

4.b5 Bg4

5.f3 Bf5 6.e3 e6 7.Ne2 Bd6 8.Nd4 Bg6 9.Bd3 Nfd7 10.0–0 Nc5 11.Bg6 hg6 12.f4 Na4 13.Bc3 Qe7 14.Qc1 g5 15.f5? (better is 15.Ne2 gf4 16.ef4 Nc3 17.Nbc3–/+) 15...Bh2–+ 16.Kf2 e5 17.Ne2 Qd7 18.Ke1 Qb5 19.d3 Nc6 20.d4 ed4 21.Bd4 Nd4 22.ed4 0–0–0 23.Qg5 (23.Kf2–+) 23...Rde8 24.Rf2 Qb2 25.f6 Qd4 26.fg7 (26.Rf3 Bd6 27.Rh3–+) 26...Re2! (26...Qa1 27.Qg4 Kb8 28.gh8Q Qh8 29.Qa4–+) 27.Re2 Bg3!! 28.Qg3 Rh1# 0–1. Tiedemann,Joern (1810) – Hoch,Hubertus (2165), RSX9E – A00 – Sokolsky–2, 2004.

5.h3 Bh5 6.d3 e6 7.g4 Bg6 8.Nf3 a4 9.g5 Nfd7 10.c4 Nc5 11.Nbd2 Nbd7 12.Qc2 h6 13.Rg1 Qe7 14.Nh4 Bh5 (worse is 14...hg5 15.Ng6 fg6 16.d4+=) 15.cd5 hg5 16.de6 Qe6 17.Nhf3 Nb3 18.Rd1 f6 19.Qc7 Bf3 20.Nf3 Nbc5 21.Qg3 Qa2 22.Bc1 0–0–0 23.h4 gh4 24.Nh4 Nb3 25.d4 Qc2 26.Ng6 Rh5 (26...Nc1 27.Nh8 Bd6 28.Qd6 Nd3 29.Rd3 Qc1 30.Rd1 Qc3 31.Rd2 Qc1 32.Rd1 Qc3 33.Rd2 Qc1 34.Rd1=) 27.Qd3 Qc7 28.Nf8 Nc1 29.Qd2 Nb3 30.Ne6 Qc4 (worse is 30...Nd2 31.Nc7 Nf1 32.Ne6+/–) 31.Qe3 Re8 32.Bh3 Rh3 33.Qh3 Re6 34.Qd3 Qd5 35.f3 f5 (35...g5!?–/+) 36.Rg7= Kb8 37.Rg5 Rh6 38.Kf2 Qd6 39.Qf5 Ka7 (39...Nd4?? 40.Qe4 Qh2 41.Rg2 Qh4 42.Qh4 Rh4 43.e4 Nb5 44.Rd7 Na3 45.Rgg7+–) 40.Rg2 White prepares the advance d5 40...Nf8 (40...Nd4? 41.Qe4 Qb6 42.Qd4+–) 41.Qe4 Ne6 d4 draws heavy fire 42.d5 Nec5 43.Qe3 Rh5 44.Rg4 Qb6 (worse is 44...Rd5 45.Rd5 Qd5 46.Ra4 Kb6 47.Rb4+/–) 45.Kg3 Rh7 46.Kg2 Qb5 47.Rh1 Rh1 48.Kh1 Qd7 49.Qe5 Qb5 50.Rb4 Qd7 51.Kg2 Na6 52.Rc4 Nbc5 53.d6 Kb6 54.Qd5 Qh7 55.Rd4 Qd7 56.Kf2 Nb3 57.Rc4 Nac5 58.Rf4 Ka7 59.Rf7 Qh3 60.Qe5 Ka6 61.Rg7 b6 62.Rg4 Na5 63.d7 Nd7 64.Qd6 Qh7 65.Ra4 Nc5 66.Rb4 Qb7 67.Kg3 Ka7 68.Kg2 Qg7 69.Kf2 Qb7 70.Kg3 Qg7 71.Kh2 Qb7 72.e3 Na6 73.Re4 Qh7 74.Kg3 Qh1 75.Re6 Qb1 76.Rh6 Nc5 77.Kg4 Nab7 78.Qc6 Qb3 79.e4 Nd3 80.Re6 Ndc5 81.Rf6 Nd3 82.Qc7 Qb2 83.Kf5 Ndc5 84.Rh6 Na6 85.Qc6 Qb3 86.Kg4 Nac5 87.f4 Nd3 88.Qe6 Qb1 89.Kf5 White plans e5 89...Qb5 90.Qd5 Ndc5 91.e5 Qe2 92.Rh8 Qe3 93.e6 Nd3 94.Rh4 b5 95.Rg4 Ndc5 (better is 95...Qe2!?+/–) 96.Qe5+– Qd3 97.Kf6 Ne4 98.Kg7 Ned6 99.Rg5 Nc4 100.Qb5 Qd4 101.Kg6 Qf4 102.Qd5 Ncd6 103.e7 Qa4 104.Kg7 Ne8 (104...Qa3!? 105.Qe5 Qa4+/–) 105.Kf8+– Ned6 106.Qe5 Qe8 107.Kg7 Nc8 108.Qe3 Kb8 109.Re5 Ncd6 110.Qb3 Qc6 111.Qd5 Qa4 112.Qe4! Qd7 (112...Qe4 113.Re4 Combination; 112...Ne4 113.e8Q Double attack) 113.Qb4 Qc6 114.Qf4 Ne8 115.Kf8 Nbd6 116.Qb4 Nb7 117.Qd4?? (better is 117.Re1+–) 117...Kc7+/– 118.Qf4 Nbd6 119.Re1 Qd5 120.Rc1 Kb8 121.Qf2 Kb7 122.Rc5 Qe4 123.Qg3 Ka6 (better is 123...Qe6!? 124.Qf4 Nc7=) 124.Rh5+/– Qe2 (124...Qd4!? 125.Re5 Nc7+=) 125.Rh3+– Qa2? (better is 125...Qb2 126.Qc3 Qf2 127.Qf3 Qg1+–) 126.Qd3 Ka7 (126...Kb7 127.Qb3 Qb3 128.Rb3 Kc8+–) 127.Qd4 Kb7 128.Qb4 Ka8?? (128...Ka7 129.Qa4 Kb7 130.Rb3 Kc8 131.Qa6 Kd7 132.Qa7 Nc7 133.Qa4 Ke6 134.Qg4 Kd5 135.Rd3 Kc6 136.Rc3 Kb6 137.Qd4 Kb7 138.Qd6 Qf2 139.Kg8 Qg2 140.Rg3 Qa2 141.Kh7 Qb2+–) 129.Qa4 Kb8 130.Rb3 Kc8 131.Qa6 Kd7 132.Qa7 Ke6 (132...Nc7 133.Qa4 Ke6 134.Qg4 Kd5 135.Rd3 Kc6 136.Rc3 Kb7 137.Qf3 Kb8 138.Rb3 Ka7 139.Qe3 Ka8 140.e8R Nce8+–) 133.Re3 Kd5 134.Rd3 Ke6 (134...Kc6 135.Rc3 Kd5 136.Qe3+–) 135.Rd6! Kd6 (135...Kd6 136.Qb6 Double attack (136.Ke8 Remove defender); 135...Nd6 136.Qe3 Decoy (136.e8Q Remove defender)) 136.Qb8 Ke6 137.Qc8 (137.Qe8?! Qf2 138.Kg8 Qg3 139.Kh7 Qh4 140.Kg6 Qg4 141.Kh6 Qh4 142.Qh5 Qh5 143.Kh5 Ke7=; 137.Ke8 Qf2 138.Qb3 Ke5+–) 137...Kd6 138.Qe8 Qa3 139.Qh5 Kc6 140.Qf5 Kb7 141.Qd5 Kc7 142.Kf7 Qb4 (142...Qh3 143.e8Q Qh7 144.Kf6 Qh6 145.Qg6 Qf8 146.Ke6 Qf7 147.Qf7 Kb6 148.Qfb7) 143.Qe5 1–0. condoru (2060) – gluv51 (2045), gameknot.com, 2015.

5.h3 Bh5 6.g4 Bg6 7.Bg2 c6 8.bc6 (8.Nf3!?=) 8...Nc6+= 9.Nf3 e6 10.0–0 (10.Nc3 Bc5 11.e3 0–0+=) 10...Bc5 (10...h5!? 11.g5 Ne4–/+) 11.Nc3+= 0–0 12.d3 a4 13.Nb5 Nd7 14.Rb1 Rc8 15.e3 Re8 16.d4 (16.Nfd4 Nf6=) 16...Bf8 17.Nc3 Na5 18.Nd2 Nb6 19.e4 Nac4 20.Nc4 Nc4 (20...Rc4?! 21.Re1+=) 21.Na4 Be4 22.Be4 de4 23.c3? (23.Bc3 b5 24.Nc5 (24.Rb5?? Qd7 25.Rb3 Qa4–+) 24...Bc5 25.dc5 Rc5 26.Qd8 Rd8 27.Rb3–+) 23...b5 24.Nc5 Bc5 25.dc5 Nd2 0–1. rona81 (1940) – gluv51 (2025), gameknot.com, 2015.

4.e3 ab4

5.ab4 Ra1 6.Ba1 e5 7.b5 (7.Be5 Bb4 8.Nf3 0–0=+). kostovist – Fabbri (1715), internet, 2006.

5.ab4 Ra1 6.Ba1 Bf5 7.c4 e6 8.c5 b6 9.cb6 cb6 (9...c6 10.Bd4=) 10.Bc3 (10.Nf3 Nbd7=+) 10...Bd6 11.Bb5 Nbd7 12.Bf6 (12.Nf3 0–0=+) 12...Qf6 (12...gf6!? 13.g4 Bg6=+) 13.Bd7= Kd7 14.Qa4 Kc8 (14...Ke7 15.Qa7 Ke8 16.Qb6=) 15.Qa8 (15.Nc3 Kb8=) 15...Bb8= 16.Qc6 Bc7 (16...Kd8 17.Nc3=) 17.Nc3+= Bd3 18.Nf3 Rd8 19.Nd4 Rd6 (19...e5 20.Qa8 Kd7 21.Qa4 (< 21.Qd5 Ke8 22.Qc6 Qc6 23.Nc6 Ra8–/+) 21...b5 22.Ndb5=) 20.Qa8 (20.Qa4 e5 21.Ndb5 Bb5 22.Nb5 Rd7 23.Qa8 Bb8+/–) 20...Kd7= 21.Qa4 Ke7 22.Ncb5 Rd7 23.Nc7?? Rc7–/+ 24.Qa3 Qg6 25.g3 h5 26.b5=+ Kf6 27.Nc6 h4?? 28.Qb2+– Kg5 29.f4 Kh6=+ 30.Rg1?? h3 31.g4= Qe4 32.Ne5 f6 33.g5= Kh5 34.gf6 gf6 35.Nd3 Qd3 36.Qa1 Rc2 37.Qd1 Kh6 38.Rg3 d4 39.Rh3+/– (39...Kg7 40.Rg3 Kh6 41.ed4 Qe4 42.Re3 Qh1 43.Ke2 Qg2 44.Kd3 Qg6 45.Re4+=) 1–0. revbodio (1935) – mattv6 (1875), Caissa's Web, 2006.

3.a3 Nc6

4.Nf3 d4 =.

4.Nf3 e5 5.Ne5+= Ne5 6.Be5 Qe7 7.d4 Qe6 (7...Ng4!? 8.Bg3 Nf6–/+) 8.Bc7 Bd6 (8...Qc6 9.Be5–/+) 9.Bd6+– Qd6 10.e3 0–0 11.Bd3 Bg4 12.f3 Bd7 13.0–0 Nh5 14.Qd2 f5 15.c4 Qg6 16.cd5 Qg5 17.e4 f4 18.e5 Bh3 19.Nc3 Rac8 20.Ne4 Qg6 21.Nf6! gf6 22.Bg6 hg6 23.gh3 g5 24.Qd3 Rc7 25.Qg6 Kh8 26.Qh5 Rh7 27.Qg6 Rg7 28.Qh6 Rh7 29.Qf8 1–0. market (1765) – chessting, GameColony.com, 2002.

4.Nf3 Bg4!? =.

4.g3 e5 5.Bg2 (5.b5 Na5 6.Be5 Nc4=) 5...Bg4 (5...a5 6.b5 Nd4 7.Bd4 ed4 8.Nf3+=) 6.d3 (6.h3 Be6+=) 6...Nd4 (6...a5 7.h3 Be6 8.b5+=) 7.Nd2 e4?? (better is 7...Bd6+=) 8.Bd4+– ed3 9.cd3 Bd6 (9...a5 10.b5+–) 10.Ngf3 (10.Bf6!? Qf6 11.Bd5 0–0–0+–) 10...0–0 11.0–0 Bf3 (11...Re8 12.h3 Bf5 13.Re1+–) 12.Nf3 c6 13.Nh4 (13.Qd2 Re8+–) 13...Re8 14.Nf5 Re6 (14...Be5 15.e3+–) 15.Nd6 Qd6 16.f4 (16.e3 a5+–) 16...Qe7 17.Bc5 Qe8 18.Re1 b6 19.Bd4 c5 (19...Qe7 20.f5 Rd6 21.e3+–) 20.bc5 bc5 21.Bc5 Rc8 (21...Qb5 22.Rc1+–) 22.Bd4 (22.Ba7 Rec6+–) 22...Ng4 (22...Rb8 23.Ba7 Rb2 24.Bd4 Rbe2 25.Re2 Re2 26.Bf6 Qe3 27.Kh1 gf6 28.Bd5+–) 23.Bh3 (23.e4 Nh6+–) 23...Ne3 (23...f5 24.Ba7 Qh5 25.Bg4 Qg4 26.e3+–) 24.Be3 Re3 25.Bc8 Qc8 26.Qc1 Qh3 (26...Qe8+–) 27.Qe3 (27.Qe3 Qe6 28.Qa7+–) 1–0. Austin,J – Vallade,J, Detroit ch–MI, 1991.

4.g3 Bf5 5.Nf3 +=.

4.e3

4.e3 (--> 3.e3 Nc6 4.a3).

4.e3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Nc6).

3.a3 Nbd7

4.e3 g6 5.c4 e6 6.Nc3 dc4 7.Bc4 Bg7 8.Nf3 0–0 9.0–0 c5 10.bc5 Nc5 11.Rc1 b6 12.d4 Nce4 13.Ne5 Bb7 14.Qb3 (better is 14.Ne4 Be4 15.f3+=) 14...Nd2–/+ 15.Qa2 Nf1 16.Nf7? (16.Bf1 Rc8–/+) 16...Rf7 (better is 16...Kf7!? 17.Be6 Ke8 18.Rf1 Ne4–+) 17.Be6–/+ Kh8 18.Bf7 Nh2 (better is 18...Nd2!?–/+) 19.Kh2= Ng4 20.Kg3 Qd6?? (better is 20...h5 21.Qe6 h4 22.Kg4 Bc8=) 21.Kg4+– Qh2 22.Bd5 Rf8? (22...Qh5 23.Kg3 Bf6=) 23.f4 (23.Bb7 h5 24.Kg5 Rf5 25.Kg6 Qh4 26.Qg8 Kg8 27.Bd5 Rd5 28.Nd5 Qg4) 23...g5 24.g3?? (24.Kf3 gf4 25.Bb7 Qg3 26.Ke2 Qe3 27.Kd1 Qd3 28.Ke1 Re8 29.Ne4 Re4 30.Be4 Qe4 31.Kf1 Qd3 32.Kg1 Qe3 33.Kh1+–) 24...h5 (better is 24...Bc8!? 25.Be6 Be6 26.Qe6 Qb2–/+) 25.Kf3+/– Re8 26.e4 Bd4 27.e5 gf4?? (better is 27...Bd5 28.Qd5 Qb2–+) 28.gf4?? (28.Bb7 Qg3 29.Ke2 Qe3 30.Kd1 Qd3 31.Ke1 Re5 32.Ne4 Qe3 33.Kd1 Qd3 34.Ke1 Qe3 35.Kf1 Qf3 36.Ke1 Qe3=) 28...Qf2 29.Ke4 Qe3 30.Kf5 Bc8 (30...Re5 31.fe5 Qe5 32.Kg6 Qf6 33.Kh5 Qf5 34.Kh4 Bf2) 31.Kf6 (31.Be6 Rf8 32.Kg6 Qg3 33.Kh6 Qf4 34.Kh5 Rf5 35.Bf5 Qf5 36.Kh4 Qg4) 31...Qf4 32.Kg6 Qf5 33.Kh6 Be3 0–1. Puru,B – Sampouw,Jacobus S (2315), Asia–chT fin, 1977. (=1.a3 Nf6 2.b4 d5 3.Bb2 Nbd7)

4.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7).

4.Nf3 g6 5.e3 Bg7 6.c4 c6 7.cd5 cd5 8.Bb5 a6 9.Ba4 0–0 10.0–0 b5 11.Bb3 Nb6 12.d3 Bb7 13.Bd4 Rc8 14.Nbd2 Ne8 15.Bg7 Kg7 16.Qe2 f6 17.Nd4 Qd6 18.f4 Nc7 (18...e5 19.fe5 fe5 20.Rf8 Kf8 21.Rf1 Kg7 22.N4f3=) 19.g4 (19.f5!?+=) 19...e5= 20.fe5 fe5 21.N4f3 Ne6 22.Rfc1 e4 23.Nd4 (23.Ne1 Ng5 24.Rc8 Bc8–/+ (24...Rc8?! 25.Rd1+=; worse is 24...Nc8 25.Qg2–/+)) 23...Nd4–/+ 24.ed4 ed3 25.Qd3 Qf4 26.Rf1 Qg4 27.Kh1 Nc4 28.Rg1 (28.Rae1!?–/+) 28...Qf4 29.Ra2 (29.Rg2 Nb2 30.Qh3 Qd4–+) 29...Nd2 (better is 29...Rce8!? 30.Nb1–+) 30.Qd2?? (better is 30.Rd2 Qe4 31.Qe4 de4 32.d5–+) 30...Qf3 (30...Qf3 31.Rg2 Qb3–+) 0–1. sbeaul (2470) – mpenga (2585), net–chess.com, 2016.

4.e3 e5

(--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

5.d4 Bd6 6.Nf3 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.d4).

4.Nf3 c6

5.e3= Nb6 6.Be2 Na4 (6...Bg4 7.Bf6 gf6 8.Nc3=) 7.Bd4+= e6 (7...Bg4 8.c3 b5 9.Ne5 Be2 10.Qe2+=) 8.c4 c5 (8...Nb6 9.c5 Nbd7 10.0–0+=) 9.Qa4 Bd7 10.Qb3 cd4 11.Nd4 Rc8 (11...dc4 12.Bc4 Rc8 13.0–0+=) 12.0–0 dc4 13.Bc4 Be7 14.d3 0–0 15.Nc3 a6 16.b5 ab5 (16...Qa5 17.Rfb1+=) 17.Ncb5 (17.Ndb5 Qa5+/–) 17...Bb5 (17...Rc5 18.Nc3+/–) 18.Qb5 Qc7 (18...Rb8 19.Rfb1+/–) 19.Rfc1 (better is 19.Rfb1 Rb8 20.Be6+/–) 19...b6?? (better is 19...Kh8+/–) 20.Ne6!+– Qd6 (20...fe6 21.Be6) 21.Nf8 Rf8 22.d4 Ne4 (22...Ng4 23.Qh5 Nf6 24.Qe5+–) 23.Bd3 f5 (23...Nf6 24.Rc6 Qd7 25.Rb6+–) 24.Rc6 Qd7 25.Rb6 h6 (25...Qd8+–) 26.Qd7 (26…Bf6 27.Qf5+–) 1–0. lucya (2110) – hispano (1765), GameColony.com, 2002.

5.e3= Qc7 6.d4 g6 (6...Nb6 7.Nbd2=) 7.c4+= Bg7 8.Nc3 e6 9.Bd3 0–0 10.0–0 Re8 11.Rc1 (11.Qc2 Nb6 12.c5 Nbd7+=) 11...dc4 (11...e5 12.Be2 e4 13.Nd2 dc4 14.Nc4+=) 12.Bc4 Nd5 (12...a6!?+=) 13.Nd5+/– ed5 14.Bd5! Qd8 (14...cd5 15.Rc7) 15.Ba2 Nf6 16.Ne5 Nd5 (16...Be6 17.Be6 Re6 18.Re1+/–) 17.e4 (better is 17.b5 Be6 18.bc6 Be5 19.de5 bc6 20.Qf3+–) 17...Nb6?? (better is 17...Be5 18.de5 Nf4+/–) 18.Bf7 Kh8 19.Be8 Qe8 20.f4 Nd7 (20...Be6 21.b5+–) 21.d5 Ne5 22.fe5 Be5 (22...Kg8 23.Qb3+–) 23.Be5 (23...Qe5 24.dc6+–) 1–0. guest2511 – guest910, ICC, 2003.

5.e3= e6 6.c4=.

3.a3 e6

(--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5).

4.d4 b6 5.e3 Bb7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.d4).

4.e3

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3).

4.e3 a5 5.b5 c6 6.bc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.bc6).

4.e3 c5 5.bc5 Bc5 6.d4 Bd6 7.Nf3 0–0 8.c4 Nc6 9.Nbd2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6 8.Nbd2 0–0 9.c4).

4.e3 c5 5.bc5 Bc5 6.Nf3 0–0 7.Be2 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0–0).

4.e3 Bd6 5.c4 c6 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 0–0 6.c4 c6).

4.e3 Bd6 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3).

4.e3 Bd6 5.Nf3 0–0 6.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.d4 0–0 6.e3).

4.e3 Be7 5.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3).

4.e3 Be7 5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 Be7).

4.Nf3

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3).

4.Nf3 a5 5.b5 c5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.Nf3).

4.Nf3 c5 5.bc5 Bc5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3).

4.Nf3 c5 5.bc5 Bc5 6.e3 0–0 7.Be2 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0–0).

3.a3 Bf5

4.Nc3 e5 5.e3 a5 6.b5 Bd6 7.a4 0–0 8.Nf3 e4 9.Nd4 Bg6 10.Nde2 (10.Be2 Re8=) 10...Nbd7 11.g3 (11.Nd4 Nb6=+) 11...Ne5–/+ 12.Bg2 Nc4 13.Bc1 Ne5 (13...Bh5 14.0–0–/+) 14.Nf4 (14.Bb2 Bh5 15.0–0–/+) 14...Bb4–/+ 15.Nce2 Rc8 16.0–0 Nf3 (16...c6 17.Ba3=+) 17.Kh1 (17.Bf3 ef3 18.Nd4 Qd6=) 17...Bf5 (17...Nh5 18.c3 Bd6 19.Ng6 fg6 20.d3=) 18.c3 (18.Bf3 ef3 19.Nd4 Qd7=) 18...Bd6 19.Qb3 (19.Bf3 ef3 20.Nd4 Qd7 21.Nf3 Ne4=) 19...c6 (19...c5 20.d3 Qd7 21.de4 de4 22.Nd5 Nd5 23.Qd5–/+) 20.Bf3 ef3 21.Nd4 Bg4 22.Bb2 g5 23.bc6 bc6 24.Nc6 Rc6 25.Nd5 Be6 26.c4 Ne4 27.d3 Nd2?? 28.Qc3+– Be5 29.Qe5 f6 30.Nf6 Rf6? 31.Qg5 Kf7 32.Qh5 Kf8 33.Bf6 Qf6 34.Rfd1 Qg7 35.Rac1 Qb2 36.Qh7 Rd6 37.Qh6 Ke7 38.Qg5 Kf7 39.d4 Bc4 40.Qa5 Qa3 41.Qc7 Kg8 42.Rc4 Nc4 43.Qc4 Kg7 44.Rc1 Re6 45.Qc7 Re7 46.Qc5 Qc5 47.Rc5 Ra7 48.a5 Kf6 49.g4 Ke7 50.e4 Ke6 51.h4 Rd7 52.Rc6 Ke7 53.d5 Ra7 54.a6 Kd8 55.Kh2 Rh7 56.Kg3 Rf7 57.Re6 Kc7 58.g5 Rf8 59.Rc6 Kb8 60.Rf6 Rc8 61.Kf3 Ka7 62.Kg4 Rc4 63.f3 Ra4 64.h5 Ra2 65.h6 Rg2 66.Kf5 Rh2 67.f4 Rh1 68.e5 Rh2 69.Kg6 Rc2 70.Rc6 Rh2 1–0. NN – SuperConstellation4, 1988.

4.d4 e6 5.Nd2 Be7 (5...a5 6.b5=+) 6.Ngf3 0–0 7.e3 h6 (7...a5 8.b5=+) 8.c4 (8.Nb3 Bd6=) 8...c6 9.Be2 Nbd7 (9...a5 10.ba5 Qa5 11.c5=) 10.c5 (10.0–0 a5=) 10...b6 11.Nb3 (11.Rc1 Qc7=) 11...bc5 (11...a5 12.Ne5 Qc8 13.g4=+) 12.dc5 Qc7 13.0–0 Rfe8 (13...e5 14.Nfd2=) 14.Nbd2 (14.Nbd4!? Be4 15.Qa4 Bf3 16.gf3+=) 14...a5= 15.Nh4 (15.Nd4 Bg6=) 15...Bh7=+ 16.Nhf3 ab4 (16...Reb8 17.Bc3=+) 17.ab4= Qb7 (17...Reb8 18.Ra8 Ra8 19.Qb3=) 18.Bc3 Ra1 19.Qa1 Ra8 20.Qd1 (20.Qb2 Rb8 21.Qa2 Ne4 22.Ne4 Be4=) 20...Bd8 (20...Ra3 21.Qc1 Ra2 22.Bd1=+) 21.Nb3 Ne4–/+ 22.Qc1 Bf6 23.Nbd4 e5 24.Nb3 Nc3 25.Qc3 e4 26.Qd2?? ef3–+ 27.Bf3 Ne5 28.Nd4 Nf3 29.Nf3 Be4 30.Nd4 Ra4 31.f3 Bg6 32.Nc2 Bc2 33.Qc2 Rb4 34.e4 Rb2 35.Qd3 Qb4 36.ed5 Qc5 37.Kh1 Qd5 38.Qa6 Qd2 39.Qc8 Kh7 40.Qf5 Kg8 41.Qc8 Bd8 42.Qh3 c5 43.Qg4 c4! 44.f4 c3 45.Rd1 (If White now only could play h3...) 45...c2 46.Rd2 Rb1 (47.Qd1 cd1Q 48.Rd1 Rd1#) 0–1. Geslot,Mickael – Fraval,Guy, Finistere–chT, 1999.

4.Nf3 c6 5.e3 Nbd7 6.Be2 e6 7.Nh4 Bd6 (7...Bg6 8.0–0=) 8.Nf5+= ef5 9.c4 dc4 10.d3 (10.Bc4 Nb6 11.Bb3 a5=) 10...cd3=+ 11.Qd3 0–0?? (better is 11...Ne4=) 12.Qd6+– Nb6 (12...a5 13.0–0+–) 13.Qd8 Rad8 14.Bf6 gf6 15.Nc3 a6 16.Rd1 Rd1 17.Kd1 Rd8 18.Kc2 Nc4 (18...f4+–) 19.Bc4 b5 (19...f4 20.e4+–) 20.Bd3 Kg7 (20...f4 21.ef4 h6 22.Rd1+–) 21.Bf5 Kh6 22.Rd1 Rg8 23.g3 Kg5 (23...a5 24.Rd6+–) 24.Bh7 Rh8 25.h4 Kg4 26.Rd4 Kh3 27.Be4 (27...Kg4 28.Bc6 Kf5 29.Bb7+–) 1–0. Double Wood – Barry49434, ChessWorld.net, 2005.

4.Nf3 h6 5.e3 Nbd7 6.Be2 g5 (6...e6 7.0–0=) 7.d3 Bg7 8.Nbd2 0–0 9.h4 Nh7? (better is 9...g4!? 10.Nd4 e6+=) 10.Bg7+– Kg7 11.Nd4 Be6 12.hg5 Ng5? (better is 12...hg5 13.Ne6 fe6+–) 13.f4 Rh8 (13...c5 14.bc5 (14.fg5?! cd4 15.gh6 Kh7+–) 14...Nh7 15.f5+– (15.Ne6 fe6 16.d4 Nhf6+–)) 14.N2b3 c5 15.bc5 (15.fg5?! cd4 16.gh6 Rh6 17.Rh6 Kh6 18.Nd4 Qc7+–) 15...Nc5 16.fg5 Na4 (16...Nb3 17.cb3 hg5 18.Rh8 Qh8 19.Ne6 fe6+–) 17.Ne6 fe6 18.Bh5 Qc7 (18...Qb6 19.gh6 Rh6 20.Qg4 Kh8 21.Kd2+–) 19.gh6 Rh6 20.Qg4 Kh8 21.Qa4 Qg3 22.Kd2 Qg2 23.Kc3 Rc8 24.Kb4 a5 (24...Qg3 25.Qd7 Rc2 26.Qe8 Qg8 27.Qg8 Kg8 28.Bf7 Kh7 29.Be6+–) 25.Qa5 Qg7 26.Nd4 Qe5 (26...Qg2 27.Kb3 Qf2 28.Bf7+–) 27.Qb6 Qe3 (27...Kh7 28.Bg4 Rf8 29.Rh6 Kh6 30.Rh1 Kg6 31.Bh5 Kh7 32.Bf7 Kg7 33.Ne6 Kf7 34.Rf1 Kg8 35.Rf8 Kh7 36.Ng5 Qg5 37.Qe6+–) 28.Bf3 Qd2 29.Kb3 Qc3 30.Ka2 Rh1 31.Rh1 Kg7 32.Rg1 Kh8 33.Qe6 (33...Qc2 34.Nc2 Rc2 35.Kb1 Rb2 36.Kb2 b5 37.Qg8#) 1–0. marekt – jartug, ChessWorld.net, 2003.

4.f4 e6 5.e3 Be7 6.Nf3 Nbd7 7.Be2 c6 8.0–0 Qc7 9.c4 (9.Nh4 Be4=) 9...0–0 10.Nc3 Rfd8 (10...dc4!? 11.Bc4 b5=) 11.cd5+= ed5 (better is 11...Nd5!? 12.Nd5 A) worse is 12...ed5 13.Nd4 Bf6 A1) 14.Nf5?! Bb2 15.Rb1 Bf6= (15...Ba3? 16.Qb3+–); A2) 14.g4+/–; B) 12...cd5+=) 12.Nd4 (12.Nd4 Be4 13.d3+/– (13.Ne4?! de4 14.Nf5 Bf8=)) 1–0. Michailow,Sergej (2200) – Roggon,Jacob (2075), Bargteheider Cup 6th, 2003. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5)

4.Bf6 ef6=+ 5.d4 (5.Nf3 Bd6=+) 5...Bd6 (5...c6 6.e3=+) 6.e3= Qe7 (6...a5 7.b5=) 7.Bd3 Qe6 (7...Be6 8.Nf3=) 8.Bf5 Qf5 9.Nd2 a5 10.c4 Nd7 (10...Qg6!? 11.Ne2 Qg2= (< 11...ab4 12.c5+/–)) 11.c5 Be7 12.b5 0–0 (12...a4 13.Ne2+/–) 13.Ne2 (13.Qf3 Qd3+/–) 13...Rfe8+= 14.0–0 Nf8 (14...b6 15.c6 Nf8 16.Qb1+/–) 15.Ng3 (15.Qb1 Qd7+/–) 15...Qd7+= 16.a4 f5 (16...b6 17.Rc1+=) 17.Nf3 (17.Qf3 g6+/–) ½–½. Woschkat,Karl_Heinz – Harding,Simon, IECG, 1998.

4.d3 e6

5.Nd2 a5 6.b5 c5 7.e3 Be7 8.Ne2 Qc7 (8...0–0 9.Be5+=) 9.h3 (9.Ng3 Bg4 10.f3 Bf5+=) 9...h5 (9...0–0 10.Ng3+=) 10.g3 (10.e4 Bg6=) 10...Nbd7 11.Bg2 Nb6 (11...0–0 12.e4 de4 13.de4=) 12.a4 (12.e4 de4 13.de4 Bg6+=) 12...Rd8 (12...0–0–0 13.0–0+=) 13.Bc3 (13.0–0 0–0=) 13...Nc8 (13...c4 14.Nd4 Bg6 15.Ba5 cd3 16.cd3 Bd3 17.Rc1+/–) 14.Qb1 (14.Nb3 b6=) 14...b6 15.Qb2 Nd6 16.Nf3 (16.0–0 c4 17.Nd4 h4+=) 16...c4 17.Ne5 (better is 17.Ned4=) 17...Nd7?? (better is 17...h4!?+=) 18.Nd7 (18.Nc6 Nf6 19.Nd8 Qd8+/–) 18...Kd7 19.Bg7 cd3 (19...Rhg8!?+=) 20.cd3 Bd3?? 21.Bh8+– Nc4 22.Qb3 Be2 23.Bd4 e5 24.Ke2 ed4 25.Bd5 d3 26.Qd3 Ne5 27.Qf5 Ke8 28.Rac1 (28.Rac1 Qd6 29.Rhd1+–) 1–0. Rewitz,Poul (2235) – Lassen,Hans Joergen, DEN–chT, 1989.

5.Nd2 a6 6.Ngf3= c5 7.bc5 Bc5 8.e3 Nbd7 (8...0–0 9.Be2=) 9.Be2 Qc7 (9...Bg4 10.h3 Bf3 11.Nf3=) 10.c4 (10.Nh4 0–0=) 10...dc4 11.Nc4 b5 12.Nce5 (12.Ncd2 0–0=) 12...Ne5 13.Be5 Qe7 14.Qb3 (14.0–0 0–0=) 14...Bd6 15.Bd6 Qd6 16.Qb2 (better is 16.e4 Bg6 17.Qb4=) 16...0–0 (better is 16...Bg4!?=) 17.e4+/– Ne4 18.de4 Be4 19.0–0 Rac8 (19...Rfc8 20.Rfd1 Qf4 21.a4+/–) 20.Rac1 (20.Qb4 Qd5+/–) 20...Qf4 21.Rfd1 (21.Rc8 Rc8 22.Qd4 Qf5+/–) 21...h6 (21...Bd5 22.Rc8 Rc8 23.Ne5+/–) 22.Qd2 (22.Rc8 Rc8 23.Qb4 Qf5+/–) 22...Qf6 (22...Qd2 23.Nd2 (23.Rd2?? Rc1 24.Bf1 Ra1–+) 23...Bc2 24.Re1+/–) 23.Rc8 (23.Qb4 Rc1 24.Rc1 Bf3 25.Bf3 Rd8+–) 23...Rc8 24.Rc1 (24.Qe3 Bf3 25.Qf3 Qf3 26.Bf3 a5+/–) 24...Rd8 (24...Rc1 25.Qc1 Kh7 26.h3+/–) 25.Qc3 (25.Qe3 Qg6+/–) 25...Qf4 (25...Qc3 26.Rc3 g5 27.Kf1+/–) 26.Rd1 Rd1 27.Bd1 Bb7 28.Qd2 (28.Be2 Be4+/–) 28...Qf6 29.Qd4 Qd4 30.Nd4 g5 31.g3 (31.Kf1 Kf8+/–) 31...e5 (31...Kg7!?+/–) 32.Nf5+– Kh7 33.Bc2 Ba8 34.Kf1 Kg6 35.Ke2 e4 36.g4+– h5 37.h3 hg4 38.hg4 Kf6 39.Ke3 Ke5 40.Ng3 f6 41.Be4 Be4 42.Ne4 a5 43.f3 b4 44.ab4 ab4 45.Nd2 f5 46.gf5 Kf5 47.Nb3 Ke5 48.Nd4 Kd5 49.Kd3 Ke5+= 50.Ne2 Kd5 (better is 50...b3!?+=) ½–½. Longorio Yepiz,Filiberto – Ham Rodriguez,Carlos, Pan American–ch Amateur, 2001.

5.Nd2 Nbd7 6.c4 +=.

5.g3 Be7 6.Bg2 (6.Bh3 Bh3 7.Nh3 a5 8.b5 0–0 9.Nd2 c6 10.bc6 Nc6 11.0–0; 6.Nf3 0–0 7.Bg2 c5 8.0–0 cb4 9.ab4 Bb4 10.Nh4 Bg4 11.h3; 6.Nc3 d4 7.Ne4 Nc6 8.Bg2 0–0 9.Nf6 Bf6 10.Nf3 h5 11.b5; 6.Nd2 0–0 7.Ngf3 c5 8.bc5 Bc5 9.Nb3 Qb6 10.Bd4 Bd4 11.Nbd4) 6...0–0 (6...c5 7.Nf3 cb4 8.Nd4 Nc6 9.Nf5 ef5 10.0–0 0–0 11.ab4) 7.Nd2 (7.Nf3 c5 8.0–0 cb4 9.ab4 Bb4 10.Nd4 Nc6 11.Nf5) 7...h6 (7...c5 8.Ngf3 cb4 9.ab4 Bb4 10.Nh4 Nc6 11.Nf5) 8.c4 (8.e4 de4 9.de4 Bg4 10.Ne2 a5 11.f3) 8...c6 (8...c5 9.bc5 Nc6 10.Ngf3 Bc5 11.0–0) 9.Ngf3 Nbd7 (9...a5 10.Nd4 dc4 11.Nc4) 10.0–0 Bh7 (10...a5 11.Qb3) 11.Re1 (11.Qb3=) 11...a5 12.Qb3 ab4 13.ab4 Qb6 14.c5 Qc7 15.Rac1 b6 16.cb6 ½–½. Tristan,L (2390) – Ruperez,M (2110), 2nd Bolivar Open, Buenos Aires ARG, 2009. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5)

5.h3 h6 6.Nf3 Be7 7.e3 0–0 8.Be2 Nbd7 9.0–0 c5 10.c3 (10.bc5 Bc5 11.Nbd2 Rc8=) 10...Rc8 11.Nbd2 Qc7 12.bc5 Nc5 13.d4 (13.Qc2 e5+=) 13...Ncd7 (13...Nd3!? 14.Ra2 Nb2 15.Rb2 Ba3–/+) 14.c4+= dc4 15.Nc4 Be4 16.Rc1 Qd8 17.Nce5 Ne5 18.de5 Nd7 19.Ne1 (19.Rc8!? Qc8 20.Qa4+=) 19...Nb6 20.Bf3 Rc1 21.Qc1 Bd5 22.Bd5 Qd5 23.Nf3 Qa2 Attacking the isolated pawn on a3 24.Qd2 (24.Bd4 Rc8 25.Qb1 Qa3 26.Bb6 ab6 27.Qb6 Qa6=) 24...Rd8 25.Qc2?? (25.Bd4 Qa3 26.Rb1 Qa6+=) 25...Na4 (better is 25...Ba3!? 26.Qc7 Rc8 27.Qb7 Bb2 28.e4–+) 26.Rb1?? (26.Qc7 Qb2 27.Qe7 Rf8=) 26...Re8?? (better is 26...Rd5 27.Ne1 Rc5–+) 27.Nd4 Nb2 28.Qb2 Qb2= 29.Rb2 Ba3 30.Rb7 Bc5 31.f4 ½–½. Sapareva,Magdalena – Atanasov,Stoyan (1900), BUL–ch Seniors, 2009.

5.Nd2 c5

6.b5 Qa5 7.c4 Nbd7 8.Qb3 d4 9.g3 Bd6 10.Bg2 Qc7 11.Ngf3 0–0 12.0–0 h6 13.e3 e5 14.e4 Bh7 15.a4 a5 16.Nh4 b6 17.Rae1 ½–½. Zharov,Dmitry (2330) – Logashov,Sergey Y, Moscow Jan, 2007.

6.b5 Bd6 7.e4 Bg4 8.Be2 Be2 9.Ne2 =.

6.b5 Be7 7.e4 Bg6 +=.

6.b5 Be7 7.Ngf3 0–0 8.g3 (8.e3 a6+=) 8...Qb6 (8...a6 9.ba6 Na6 10.Bg2–/+) 9.a4 a6 Black gets strong initiative 10.c4 Qa5 (10...ab5 11.ab5 Nbd7 12.Bg2+=) 11.Bg2 dc4 12.dc4 Rd8 13.0–0 Ne4 14.Bc1 (14.Nb3 Qb4 (14...Rd1?! 15.Na5 Rd7 16.b6=) 15.Qc2 Ng3–+) 14...ab5–/+ 15.cb5 Bf6 16.Ra3 (16.Ra2 Nc3 17.Qb3 Na2 18.Qa2 Qa4 19.Qa4 Ra4–+) 16...Bc3 17.Ra2 Bb4 (better is 17...c4–/+) 18.Qb3? (18.h3 Nc3 19.Qb3 Ne2 20.Kh2 Nc1 21.Rc1 Bd2 (worse is 21...Rd2 22.Nd2 Bd2 23.Rd1–+) 22.Nd2 Rd2 23.Bb7 Ra7 24.Rc5 Rd8–+ (24...Rb7 25.Rd2 e5 26.Qc3+–)) 18...Nc3?? (better is 18...Bd2 19.Rd2 Rd2 (worse is 19...Nd2 20.Bd2 Qa4 21.Qb2–+) 20.Bd2 Nd2 21.Nd2 Qd2–+) 19.Nc4–/+ Qc7 (19...Qa7 20.Bg5 f6+=) 20.Bf4 Qe7 21.Rb2 Nd7 (21...Ra4 22.Be5 Ne2 23.Re2 Bd3 24.Qa4 Be2+–) 22.Ra1 Nb5 (22...Nf6!?+=) 23.Rc1 Na7 (23...e5 24.Nce5 Ne5 25.Be5 Be6=) 24.Bd6 (better is 24.Nd4! cd4 25.Qb4 Qb4 26.Rb4+=) 24...Qf6+= 25.Nfe5 (25.Nh4 Nc6+=) 25...Ne5–/+ 26.Be5 Qe7 (26...Qh6!? 27.Bf4 g5=) 27.Nb6= f6 (27...Nc6 28.Bc6 Ra6 29.Bb7 Qb7–/+) 28.Na8+/– Ra8 (28...fe5!? 29.Nb6 Qg5+/–) 29.Bc3+– Nc6 30.Bc6 bc6 31.Bb4 cb4 32.Qb4 Qd7 33.Ra2 Qd5 34.Qc4 Ra5? 35.Qd5 cd5 36.Rc8 Kf7 37.Rb8 d4 38.Rb5 Ra7 39.f3 e5 40.a5 Ke7 41.Rb8 Kd6 42.Kf2 Kc5 43.Ra1 Kd5 44.h4 Bd7 45.Rb6 White prepares the advance a6 45...f5 46.a6 White threatens Rb7 46...Bc8? 47.Ra5 Kc4 48.Re5 Ra6 49.Ra6 Ba6 50.Rf5 Kc3 51.Rf7 Bb5 52.Rg7 Kd2 53.Re7 (53.Re7 Bc4 54.Rd7+–; 53.Rb7 Bc4+–) 1–0. Valenta,Vit – Jancalek,Petr, Morava–ch U20, 1992.

6.b5 Be7 7.g3 Nbd7 8.Bg2 Qb6 9.a4 0–0 10.Ngf3 Rac8 11.c4 d4 12.0–0 Rfe8 13.a5 Qc7 14.a6 b6 15.Qb3 (15.Nh4 Rcd8+=) 15...h6 16.Rfe1 Bd6 17.e4 Bh7 18.Re2 e5 19.h4 Nh5 20.Bh3 Rf8 21.Bg4 Nhf6 22.Bh3 Ne8 23.g4 g6 24.Nf1 f5 25.g5 hg5 26.Ng5 Ng7 27.Nh7 (27.Rae1!?+=) 27...Kh7= 28.Nh2 Qd8 (28...Nh5!? 29.Bc1 fe4 30.Re4 Nhf6+=) 29.Nf3+= Be7 30.Kh2 (30.ef5 Nf5 31.h5 gh5 32.Ne5 Bd6 33.Nd7 Rg8 34.Kf1 Qd7=) 30...Bh4= 31.Rg1 Nh5 32.Bc1 f4?? (better is 32...fe4 33.Bg5 Bg5 34.Ng5 Kh8+=) 33.Bd7+– Qd7 34.Nh4 f3 35.Ree1 Rf6 36.Rg5 Nf4 37.Bf4 (37.Rg3 Ne2 38.Rh3 Rh8+–) 37...ef4?? (37...Rf4 38.Kg3 Qe7=) 38.Nf3 Rh8 39.Kg2 Kg7 40.Kf1 Rh3 41.Ke2 Kh6 42.Reg1 Kg7 (42...Qe8 43.Qc2+–) 43.Ne5 Qd6 44.Ng6 f3 45.Ke1 (better is 45.Kd2 Rg6 46.Rg6 Qg6+–) 45...Rg6 46.Rg6 Qg6 47.Rg6 Kg6 48.Kd2 Rh1 49.Qd1! Rd1 50.Kd1 ½–½. Santana,Expedito (1690) – Dalanhol,Joao Vitor (1870), Curitiba BRA, Open, 2014.

6.bc5 Bc5 7.e3 Nc6 8.Ngf3 h6 (8...0–0 9.Be2+=) 9.Be2= 0–0 10.0–0 Rc8 11.c4 dc4 12.Nc4 b5 13.Nce5 Ne5 14.Ne5 Nd7 15.Qb3 Bd6 16.Nd7 (16.Qb5? Ne5 17.Be5 Rc5–+) 16...Qd7 17.Rfc1 a6 18.e4 Bg6 19.g3 Qa7 20.a4 b4 21.a5 Bc5 22.Rf1 Rfd8 23.Rac1 Bd6 24.Kg2 Qb7 25.Rc8 Rc8 26.f4 Rc5 27.Ra1 Bc7 (27...Qc7!?–/+) 28.Bf3+= Qb8 (28...Ra5? 29.f5 Ra1 30.Ba1+–) 29.Bd4 Ra5 30.Ra5 Ba5 31.Qa4 (better is 31.Qb2!?=) 31...Qd8 32.Qa1 f6 33.e5 f5 (33...Bb6 34.Bb6 Qb6 35.ef6–/+) 34.Bf2 (34.Bg1 Qd3 35.Qa5 b3–/+) 34...b3–/+ 35.Qb1 Qb8 36.Qb2 (36.Bd1 Qb7 37.Kg1–+) 36...Be8–+ 37.d4 (37.Kg1 Qb4–+) 37...Bc3 38.Qb1 Qb5 Black prepares the advance b2 39.d5 ed5 40.Bd1 b2 41.Bc2 d4 42.Bf5 Bc6 43.Kh3 Qd5 44.Kh4 Bb4 (44...Bb4 45.g4 Qg2–+) 0–1. Protze,Gunter – Wuttke,Johannes, BdF, 2000.

6.bc5 Bc5+= 7.e3 Nbd7 8.Ngf3 0–0 9.Be2 h6 10.0–0 Rc8 11.c4 (11.Rb1 Qc7=) 11...Ng4 (11...dc4!? 12.Nc4 b5=) 12.Nd4 Bd4 (12...Qh4 13.N2f3 Qf6 14.cd5 ed5 15.Qb3 Bd4 16.Bd4+/–) 13.Bd4 Nge5 14.cd5 ed5 15.Ba7 (15.Qb3 Nc6 16.Qd5 Nde5 17.Qd8 Rfd8 18.Be5 Ne5+/–) 15...b6 16.Nf3 (16.e4 Be6 17.Qa4 de4 18.Ne4+= (worse is 18.Qe4 Nc6–+)) 16...Nc6–/+ 17.Bb6 Qb6 (17...Nb6 18.Qd2–/+) 18.Qd2 (18.d4 Rfe8–/+) 18...Rb8 (18...d4 19.Rfb1 Qa7 20.Rb5–/+) 19.Rfc1 (19.Nh4 Bh7–/+) 19...Rfc8 (19...d4 20.Qc2 Rfc8 21.ed4 Nd4 22.Qc8 Rc8 23.Rc8 Nf8 24.Re8–+) 20.h3 (20.a4 d4–/+) 20...Qb2 (20...Nc5 21.Qd1–/+) 21.Qb2 (21.Ra2 Qf6–/+) 21...Rb2 22.Bf1 (22.g4 Be6 23.Kf1 Kf8–/+) 22...Nde5 23.Ne5 Ne5 24.Rc8 Bc8 25.a4 Ba6 26.d4 Nc4 27.g3+= Kf8 28.Bg2 Bb7 29.a5 Rb5 30.a6= Ba8 31.Bf1 Ra5 32.Ra5 Na5 33.Bb5 Ke7 34.Kf1 Kd6 35.h4? Kc7–/+ 36.Ke2 Kb6–+ 37.Bd3 Nc4 38.Kd1 Nb2 39.Kd2 Nd3 40.Kd3 Ka6 41.Kc3 Kb5 42.Kd3 Kb4 43.Kc2 f5 44.Kb2 Bb7 45.Kc2 Ba6 46.Kd2 Kb3 47.f3 h5 48.Kd1 Kc3 (48...Kc3 49.Ke1 Kc2–+) 0–1. Fengsrud,Roy – Gross,Wilhelm, corr 3GMM–08, 1997.

6.e4 de4 7.Bf6 Qf6 8.de4 Bg6 9.Bb5 Nc6 +=.

6.e4!? Bg6 7.ed5 Qd5 8.bc5 Bc5 9.Ngf3 =.

4.e3

4.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.a3).

4.e3 Nbd7 5.d4 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

4.e3 e6 5.c4 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.e3 e6 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

4.Nf3 Nbd7

5.e3 a6 6.Nh4 Be6 7.h3 c5 8.Nf3 d4 (8...Qb6!?=) 9.ed4+/– cd4 (9...cb4 10.ab4 Bf5 11.b5+/–) 10.Nd4 Nb6 (better is 10...Bd5!?+/–) 11.Ne6+– fe6 12.Nc3 Qc7 13.Qf3 Qe5 14.Be2 Nbd5 15.Na4 Qe4 16.Qe4 Ne4 17.Bh5 g6 (17...Kd8+–) 18.Bh8 gh5 19.Be5 Rc8 20.c4! Rc4 21.d3 Rc2 (21...Nb4 22.ab4 (22.de4?! Nc2 23.Kd2 Na1+=) 22...Rb4 23.f3+– (23.de4?! Re4 24.Kd2 Re5+–)) 22.de4 Nf6 23.Nc5 b6 24.Na6 Ne4 25.0–0 Nd2 26.Rfc1 Rc1 (26...Rc4 27.Rd1 Bh6 28.a4+–) 27.Rc1 Bh6 28.Rc8 Kf7 29.Rh8 (better is 29.b5!? Ne4 30.Rc6 Nf6+–) 29...Kg6 (29...Nc4 30.Rh7 Kg6 31.Re7+–) 30.a4 Nc4 31.Bc3 e5 32.Rc8 Nd6 33.Rc6 Kf5 34.Rb6 Ne4 (34...e4 35.Bd4+–) 35.Rh6 Nc3 36.Nc5 Ne2 37.Kf1 Nd4 38.b5 e6 39.b6 e4 40.b7 Nc6 41.Nd7 Kg5 42.Re6 Nd8 43.b8Q Ne6 44.Qe5 Kh4 (44...Kg6 45.Qf6) 45.Qg3 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

5.e3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7).

5.e3 e6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.Nh4 Be6 6.e3 c6 7.Be2 Nb6 8.Bd4 Qc7 9.0–0 Ne4 10.f4 0–0–0 11.a4 f6 (better is 11...Kb8!?+/–) 12.a5+– Nd7 13.Ba7 g5 14.fg5 fg5 15.Nf3 g4 16.Nd4 Qd6 (16...g3 17.hg3 (17.Ne6?! gh2 18.Kh1 Ng3 19.Kh2 Nf1 20.Kg1 Qh2 21.Kf1 Rg8+–) 17...Bh3 18.Rf3+–) 17.a6 (17.Ne6 Qe6 18.Bg4 Qd6+–) 17...b6 (17...g3 18.h3 Nf2+–) 18.Ne6 Qe6 19.Bb6! Nb6 (19...g3 20.a7 gh2 21.Kh1 Ng3 22.Kh2 Nb6+–) 20.Bg4 (20.Bg4 Qd7 21.Bd7 Kd7 22.Qg4 Kd6 23.d3+–) 1–0. BlackDemon (2610) – Jatiwangi, FICS rated standard game, 2013.

5.Nh4 Be6 6.e3 g6 7.Be2 Bg7 8.0–0 c5 9.f4 Kf8 (9...Qb6 10.Bc3=) 10.g4+= d4 11.ed4 cb4 12.ab4 Nb6 13.c3 Qd7 14.f5 gf5 15.Nf5 Bf5 16.Rf5 Rg8 (16...h5!?+=) 17.Qf1+/– e6? (better is 17...Bh6+/–) 18.Rf6+– Bf6 19.Qf6 Nd5 20.Qh6 Rg7 (20...Ke8+–) 21.c4 (21...Kg8 22.cd5 ed5 23.Nc3+–) 1–0. marekt – SteVeYboY, ChessWorld.net, 2003.

5.Nh4 Bg6 6.Ng6 hg6 7.g3 (7.e3 e6=) 7...c6 8.Bg2 e5 9.0–0 a5 10.b5 Qb6 (10...cb5 11.Nc3 Nb6 12.Nb5+=) 11.bc6 (11.Nc3 Bd6=) 11...bc6+= (worse is 11...Qb2 12.cd7 Nd7 13.Nc3+=) 12.Ra2 Qa6 (12...Bc5 13.e3=) 13.e3 Rb8 14.d3 Bc5 (14...Bd6 15.Nd2=) 15.Nd2 0–0 (15...Bd6 16.c4=) 16.Qa1 (16.c4 a4=) 16...Rfe8 Black prepares e4 17.c4 Qa7 18.Nf3 e4 19.de4 de4 (worse is 19...Re4 20.cd5 cd5 21.Nd4 Rb2 22.Rb2 Rd4 23.ed4 Bd4 24.Rd1 Bb2 25.Qb2+–) 20.Nd2 a4 (20...Bd6 21.Rb1=) 21.Qd1 Re6 22.Kh1 (22.Qc2 Rbe8+=) 22...Bb6 23.Qc2 e4 becomes the focus of attention 23...Rbe8 24.Bh3 (24.Rb1 Bc5+=) 24...R6e7 25.c5 (25.Rb1 Bc5+=) 25...Nc5= 26.Nc4 Nfd7 (26...Bc7 27.Bd4=) 27.Rd1 (27.Bd4 Nb3 28.Bb6 Nb6=) 27...Bc7 28.Bd4 Qa6 29.Bf1 Nd3 (29...Qa8 30.Nd2 Ne6 A) 31.Qe4? Nd4 32.Qg2 Nb3–+; B) 31.Ne4 c5 (worse is 31...Nd4 32.Rd4 Nb6 33.Nc5+/–) 32.Bg2 Nd4 (32...cd4?! 33.Nf6 Nf6 34.Ba8 Ra8 35.ed4+=) 33.Rd4 cd4 34.Nf6 B1) worse is 34...gf6 35.Ba8 de3 36.fe3+/– (36.Qc7?! e2 37.Re2 Re2 38.Qd7 Ra8=); B2) 34...Nf6 35.Ba8 de3–+ (worse is 35...Ra8 36.ed4 Rd8 37.Qa4–/+); C) 31.Bc3+=) 30.Bd3 ed3 31.Rd3 c5 32.Ba1 Nf8 33.Kg1 Ne6 34.h4 (34.f3 Qc6 35.e4 f5=) 34...g5 35.h5 g4 36.Rd5 Qb7 37.Qf5 Qb3 38.Qc2 Rd8 39.Rb2 Rd5 40.Rb3 ab3 41.Qb3 Ng5 ½–½. Cirulis,Ilmars (1865) – Bartsch,Reinhard Andrea (2040), FICGS, 2016.

4.Nf3 e6

5.Nc3 Bd6 6.e3 0–0 7.Be2 c5 8.0–0 cb4 9.ab4 Bb4 10.Ba3 Qe7 11.Nb5 Ba3 12.Na3 Nc6 13.Nb5 a6 14.Nbd4 Nd4 15.Nd4 Be4 16.Bf3 Bf3 17.Nf3 Ne4 18.Ne5 f6 19.Ng4 Rac8 20.d3 Nc3 21.Qf3 e5 22.Qh3 f5 23.f4 fg4 24.Qg4 ef4 25.Rf4 Rf4 26.Qc8 Rf8 27.Qc3 Qe3 28.Kh1 Qe2 29.Qe1 Qc2 30.Qe6 Kh8 31.Qe7 Qf2 32.Qe1 d4 33.Rc1 h6 34.Rc7 Qe1 0–1. Guest23622 – Guest23753, 2003.

5.c4 dc4–/+ 6.Qc1 Nbd7 7.Qc4 Nb6 8.Qb3 Be7 9.Nc3 0–0 10.d3 a5 11.b5 a4 12.Qc2 Nfd5 13.e4 Nc3 14.Bc3 Bg6 15.Ne5 Bf6 16.Be2 Nd7 (16...Rc8 17.Ng6 fg6 18.e5=) 17.Nd7 (17.Ng6 Bc3 18.Qc3 fg6+=) 17...Bc3= 18.Qc3 Qd7 19.0–0 Rfd8 20.Rfc1 Qb5 (20...Rdc8 21.h4 h6 22.h5=) 21.Rab1+= Qg5 22.Rb7 h6 23.g3 (23.Rc7 e5+/–) 23...Rab8 24.Rb8 Rb8 25.Qc7 Rb3 26.h4 Qd2 27.Qc8 (27.Qd8 Kh7 28.Rc8 Qe1 29.Bf1+–) 27...Kh7= 28.Qc2 Qc2 29.Rc2 f6 (worse is 29...Ra3 30.h5+–) 30.Ra2 e5 31.Ra1 (31.f4 Bf7 32.Ra1 Rb2+=) 31...Be8= 32.Kf1 Bb5 33.d4 Be2 34.Ke2 ed4 35.Rd1 Ra3 36.Rd4 Ra1 37.Kf3 Kg6 38.Rd5 h5 39.e5 a3 40.ef6 gf6 41.Ra5 Ra2 42.Ke3 Ra1 43.Kf4 a2 (better is 43...Rf1!? 44.Ra3 Rf2 45.Ke4 Rf1=) 44.Ra6 Kg7 (44...Rb1!? 45.Ra2 Rb4 46.Ke3 Kf5+/–) 45.Kf5+– Rb1 46.Ra7 (worse is 46.Ra2 Rb5 47.Ke4 Kf7+/–) 46...Kh6 47.Ra2 Rb6 48.Re2 Rb3 49.Kf6 Rf3 50.Ke5 Ra3 51.Kf4 Ra4 52.Re4 Ra6 53.Kf5 (53.Kf5 Ra7 54.Re6 Kh7 55.f3+–) 1–0. Vastrukhin,Oleg (2290) – Ognerubova,Anastasia (2100), Voronezh op–A, 2008. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.Nf3 e6)

5.d4 Be7 6.e3 0–0 7.Bd3 Bd3 8.Qd3 b6 9.0–0 c5 10.dc5 bc5 11.bc5 Bc5 12.Nbd2 Nbd7 13.c4 dc4 14.Nc4 Qe7 15.Rfd1 Rfd8 16.Qc3 Nb6 17.Rd8 Rd8 18.Nb6 ab6 19.h3 Rd5 20.Ne5 Qd8 21.Ng4 Be7 22.Nf6= Bf6 23.Qc2 Bb2 24.Qb2 Rd1 25.Rd1 Qd1 26.Kh2 Qd6 27.g3 h6 28.Qb4 Qb4 29.ab4 Kf8 30.e4 Ke7 31.e5 Kd7 32.b5 f6 33.f4 Ke7 34.h4 f5 35.h5 Kf7 36.Kh3 g6 37.hg6 Kg6 38.Kh4 h5 39.Kh3+= Kf7 40.Kh4 Kg6= 41.Kh3 Kf7 42.Kh4 Kg6 ½–½. Fournier,Frederic (2005) – bobof (1845), Active, 2004.

5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.e3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.Nh4 Bg4 6.h3 Bh5 7.g4 Ne4 8.Nf3 Bg6 9.d3 Nd6 10.Ne5 Nd7 11.Ng6 hg6 12.Nd2 c6 13.Qc1 (13.c4 a5+=) 13...e5 (13...Qc7 14.Bg2=) 14.c4 (14.Bg2 Qf6+=) 14...Be7 (14...Qf6 15.Bg2 dc4 16.Nc4 Nc4 17.Qc4+=) 15.Bg2+= Rc8 16.cd5 (16.c5!? Nb5 17.Nf3+=) 16...cd5= 17.Qd1 d4 18.0–0 (18.Ne4 Ne4 19.Be4 Qb6=) 18...Bg5 19.a4 Bf4 20.Nc4 Nc4 21.dc4 Qb6 22.Qb3 Nc5 (better is 22...a5!? 23.b5 f5 24.gf5 gf5=) 23.Qa3+= Ne6 24.c5 Qc7 25.e3 de3 26.fe3 Bg5 27.Rad1 (27.a5!?+=) 27...a5= 28.Rd6 ab4 29.Re6 (29.Qb4 Be3 30.Kh1 0–0 31.Qb7 Qc5=) 29...fe6+= 30.Qd3 Be3 (30...Rh6!? 31.h4 Be3 32.Qe3 Qc5=) 31.Qe3+= Exerts pressure on the isolated pawn 31...Qc5 32.Re1 b6 (32...Kf7 33.Be5 (worse is 33.Bb7 Rh3 34.Qc5 Rc5+=) 33...Qe3 34.Re3 Rc1 35.Kf2+=) 33.Be5 Qe3 34.Re3 Rc1 35.Kh2 0–0 36.Kg3 Rfc8 (36...Rd8 37.Kf4+=) 37.Kh4 (37.Bd4 R8c4 38.Bb6 R1c3=) 37...R8c5 (37...Kf7 38.Bd4+/–) 38.Bd6 (38.Bd4 Ra5+/–) 38...R5c2 (38...Ra5 39.Bb4 (39.Re6?! b3=) 39...Ra4 40.Bd6+/–) 39.Be4 Rc3 40.Re2 b3 (40...g5 41.Kg5 b3 42.Bg6+–) 41.Bg6 R1c2? (better is 41...Rc8!?+/–) 42.Re6+– Rc8 43.Bc2 bc2 44.Bf4 c1Q 45.Bc1 Rc1 46.Rb6 Ra1 (46...Rc5 47.Rb5 Rc3 48.a5+–) 47.Ra6 Ra3 48.g5 Kf7 (48...Kh7 49.Ra7+–) 49.Ra7 Kg6 50.Kg4 Rc3 51.Ra6 Kf7 (51...Kh7 52.a5 Rc4 53.Kh5+–) 52.h4 Rc4 (52...g6 53.Rf6 Kg7 54.a5+–) 53.Kh5 Rc7 (53...Rc8+–) 54.a5 Rc4 55.Rb6 Rc8 (55...Ra4 56.a6 Ra5 57.Rb7 Kg8 58.a7+–) 56.a6 Rh8 57.Kg4 Rc8 58.a7 Rc4 59.Kh5 Ra4 (59...g6 60.Rg6 Ra4 61.Rb6 Ra7 62.Kh6+–) 60.Rb7 Kg8 61.Rb8 Kf7 62.g6 1–0. Lerch,Patrice – Gvanceladze,Anna, 31st Avoine Open, 2016. (=1.a3 d5 2.b4 Nf6 3.Bb2 Bf5 4.Nf3 e6)

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.e3 c5 9.bc5 Bc5 10.g5 Ne4 11.Bg7 Rg8 12.Bb2 Qg5 13.Ng6 Qg6 14.Qg4 Nd7 15.c4 dc4 16.Bc4 Rc8 17.Bd3 f5 18.Qg6 Rg6 19.Be4 fe4 20.Nc3 Nf6 21.a4 Be7 22.Ke2 ½–½. aspasio – jessamine, net–chess.com, 2014.

5.Nh4 Bg4 6.h3 Bh5 7.g4 Bg6 8.Bg2 Be4 9.f3 Bg6 10.Ng6 hg6 11.e4 de4 12.fe4 c6 13.Rf1 Be7 14.e5 Nd5 15.Qf3 Bh4 16.Ke2 Qe7 17.c4 Nb6 18.Qb3 Na6 19.d4 0–0–0 20.Nc3 White prepares b5 20...Nc7 21.a4 White intends b5 21...Qf8? (better is 21...Rd4 22.Ne4 Re4 23.Be4 Na6+/–) 22.a5+– Nd7 23.b5 c5 (23...Nb8+–) 24.b6 ab6 25.Nb5 (worse is 25.ab6 Na6 26.Nb5 Ndb8 27.Na7 Kd7 28.Bb7 Nb4 29.Qa4 Ke7 30.dc5 Bg5 31.Qb4 Rh3 32.Nc8 Rc8 33.c6 Ke8 34.Qf8 Kf8 35.Bc8 Nc6+–) 25...Nb5 26.Qf3 (26.Qf3 Re8 27.Qb7 Kd8 28.Bc6 Nc7 29.ab6 Ke7 30.Qc7 Rd8 31.Ra7 f5 32.Bd7 Qf6 33.ef6 Kf6 34.d5 Ke7 35.Bc6 Rd7 36.Qd7 Kf8 37.Qg7; 26.cb5 cd4 27.Bd4 Nc5+–) 1–0. capablancaven (1815) – rgold52 (1820), gameknot.com, 2011.

5.Nh4 Bg6 6.Ng6 hg6 7.e3 Be7 8.d4 0–0 (8...Qd6 9.h3=) 9.c4+= c6 10.c5 a5 11.Nd2 Nbd7 12.Be2 ab4 13.ab4 Ra1 14.Qa1 b6 15.0–0 b5 16.Nb3 Ne4 17.f3 Nef6 18.Qa5 Qa5 19.Na5 Nb8 20.Ra1 Rc8 21.Kf2 Bd8 22.Nb7 Be7 23.Ra8 Nfd7 24.Na5 Rd8 25.Ra7 Bh4 26.g3 Bg5 27.h4 Bf6 28.Rc7 Na6 29.Rc6 (29.Rc6 Nb4 30.Rc7+–) 1–0. emmasdad – Szkodnikow_i_ofiar, ChessWorld.net, 2015.

5.Nd4 Bg6=+

6.e3 a6 7.Be2 c5 8.bc5 Bc5 9.Nb3 Be7 10.0–0 0–0 11.Nc3 Nc6 12.Rb1 Ne4 (12...b5!?=+) 13.Ne4= Be4 14.d3 Bg6 15.Nd4 (15.Bh5 Bh5 16.Qh5 b5=) 15...Rb8 (15...Rc8 16.a4=+) 16.Nc6= bc6 17.Qd2 Qd7 18.Qa5 (18.Be5 Rb1 19.Rb1 f6=) 18...Rb5 19.Qc3(19.Qa6? Rfb8–+) 19...Rfb8?? (better is 19...f6 20.d4 Rb6=) 20.Qg7 1–0. lucya (2210) – sToRmYkNiGhT (1640), GameColony.com, 2002.

6.e3 Bd6 7.Nb5= Be7 8.Be5 Na6 9.Nd4 c6 (better is 9...Nb8=) 10.Ba6+– ba6 11.Nc6 Qd7 12.Ne7 Qe7 13.0–0 0–0 14.f4 (14.Nc3 a5 15.ba5 Nd7+/–) 14...Rfc8 (14...a5 15.ba5 Rfc8 16.Nc3+/–) 15.Nc3 Nd7 16.Bd4 f6 17.f5 Bf7? (better is 17...Bf5!? 18.Nd5 Qd6+=) 18.fe6+– Be6 (18...Qe6 19.Qf3+–) 19.Qh5 Rc4 (better is 19...a5+–) 20.Nd5 (20...Qd6 21.Nc3+–; 20.d3 Rc6 21.Nd5 Qf7 22.Qf7 Kf7+–) 1–0. b4_player (2215) – chimchim (2035), GameColony.com, 2003.

6.e3 Nbd7 7.Be2=+.

6.e3 Nbd7 7.f4 a6 8.Be2= Bd6 9.0–0 0–0 10.Nc3 c5 11.bc5 Nc5 (11...Bc5 12.Nb3=) 12.f5 ef5 13.Nf5 Bf5 14.Rf5 Nce4 (14...Qd7 15.Bg4 Qc7 16.Rf6+–) 15.Ne4+= (15.Nd5? Nd5 16.Bf3 Ndf6 17.Be4 Ne4–+) 15...Ne4 16.d3 Nc5 17.Bf3 Qe7 (17...Qc7 18.g3 Rae8 19.Qd2+= (19.Rd5?! Re3 20.Bd4 Re7=)) 18.Qd2+/– (18.Rd5?! Qe3 19.Kh1 Rad8=) 18...Rae8 19.Rd5 Bb8 (19...b5 20.c4+/–) 20.Re1 Qc7 (20...Bd6 21.Qc3 Ne6 22.Re2+/–) 21.g3+– Re6?? (better is 21...Rc8+–) 22.Qc3 Rg6 23.Rc5 Rg3 (23...Qe7 24.Be4 Rf6+–) 24.Kf2 Qd6 25.hg3 Qg3 26.Ke2 f6 (26...b6 27.Rc6+–) 27.Rc8 Qh2 (27...Bd6 28.Qb3 Kh8 29.Qb7+–) 28.Kd1 Bd6 29.Bd5 Kh8 30.Qf6! Qh5 (30...gf6 31.Bf6#) 31.Kc1 (31...Qd1 32.Kd1 gf6 33.Bf6#) 1–0. kamret (2190) – superbooper, GameColony.com, 2003.

6.e3 Nbd7 7.f4 c5 8.bc5 Bc5 9.Be2=+.

3.a3 g6

4.Nf3 Bg7 5.e3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

4.f4 Bg7 5.Nf3 0–0 6.e3 a5 7.b5 c5 8.a4 (8.Be2 Bf5=) 8...d4 9.Be2 (9.ed4 Nd5=) 9...Nd5 (9...de3 10.de3 Qd1 11.Bd1=) 10.c4= Nb4 11.ed4 cd4 12.d3 Qd6 13.Qd2 Bf5 (13...Nd7 14.0–0+=) 14.Ba3 (14.0–0 Nd7=) 14...Nd7+= 15.Nh4 (15.0–0 Nc5 16.Bb4 ab4 17.Qb4 Bd3 18.Bd3 Nd3 19.Qd6 ed6+=) 15...Nc5–/+ Now all is on d3 16.Nf5 gf5 17.0–0 (better is 17.Bb4!? ab4 18.Ra2–/+) 17...Nb3–+ (17...Na4?! 18.Bf3 Rfb8 19.Qe1=) 18.Qb2 Na1 19.Qa1 Qe6 20.Rf2 Qe3 21.Bb4 (21.Kf1!? Nc2 (21...Nd3 22.Rf3+/–) 22.Qb2 Na3 23.Qa3 Rab8–+) 21...ab4 22.a5 e5 23.Qa4 e4 24.Qb4 Rfc8 (24...Rfe8!? 25.Nd2–+) 25.Nd2 ed3 (better is 25...Re8!?–+) 26.Bf3+= Bf8 27.Qb2 (27.Qb1 Ra5 28.Bb7 Rb8=) 27...Ra5–/+ 28.Bb7 Rb8 (28...Ba3 29.Qb1 Rc5 30.Bc6+=) 29.Bd5+= Ba3 (better is 29...Ra3+=) 30.Qb3?? (better is 30.Qb1=) 30...Bc1 31.Nf1 Ra1?? (better is 31...Qe1 32.Qb1 Rd8–+) 32.Qd1–/+ Qe7 (32...Bb2 33.Qa1 Ba1 34.Ne3 de3 35.Kf1–+) 33.g3 (33.Qd3 Be3 34.g3 Re8–+) 33...d2 34.Re2 (34.Nd2 Bb2 Combination) 34...Qc5 (better is 34...Qa7!? 35.Kg2 Qa4 36.Rd2 Bd2=) 35.Re5 (35.Rd2? Qa7 36.Rf2 Be3–+) 35...d3 36.Kg2 Bb2 37.Bf7 Kh8 (37...Kf7?! 38.Qh5 (38.Rc5?? Rd1 39.Nd2 Rd2 40.Kf3 Rh2–+) 38...Kg8 39.Qg5 (39.Rc5? d1Q 40.Qd1 Rd1–+) 39...Kh8 40.Qf6 (40.Rc5 d1Q 41.Ne3 Qe2 42.Kh3 Rh1–+) 40...Kg8 41.Qg5 (41.Rc5 Bf6 42.Nd2 Ra2–+) 41...Kh8 42.Qf6 (42.Rc5 d1Q 43.Ne3 Qe2 44.Kh3 Rh1–+) 42...Kg8 43.Qg5= (43.Rc5 Bf6 44.Nd2 Ra2–+)) 38.Rc5 Rd1 39.Bh5 Rc1 40.Ne3? (better is 40.Rd5 d1Q 41.Bd1 Rd1 42.Ne3 Rd2 43.Kf3+=) 40...Bd4–+ (40...Bd4 41.Re5 Be3 42.Re3 d1Q 43.Bd1 Rd1–+) 0–1. Swartz,David (1940) – Makoto,Rodwell (2405), PSS, 2016. (=1.a3 d5 2.b4 Nf6 3.Bb2 g6)

4.Bf6 ef6 5.e3 (5.Nf3 a5 6.b5 Bd6=) 5...Nc6 (5...Bd6 6.Nc3=) 6.Bd3 (6.Nf3 Ne5=) 6...Bg7 (6...Bd6 7.Be2=) 7.c3 (7.Nf3 Ne5=) 7...0–0 8.Be2 f5 (8...Re8 9.Nf3=) 9.d4 (9.Nh3 Qf6=) 9...a6 (9...f4 10.ef4 Qd6 11.Qd2=) 10.Bf3 (10.Nf3 f4 11.ef4 Qf6=) 10...Re8 11.Ne2 Qd6 (11...g5 12.g3=) 12.0–0 (better is 12.Nd2=) 12...f4 (better is 12...g5!? 13.Ng3 g4=) 13.Nf4+/– Ne7 (13...g5 14.Nh5+/– (14.Nd5?! g4+=)) 14.Nd2 (14.c4 dc4 15.Nd2 Ra7+/–) 14...b5 (14...Bf5 15.Re1+/–) 15.Qb3 (15.c4 c6 16.cd5 cd5+/–) 15...c6 16.Nd3 (16.a4 Bf5+/–) 16...Bf5 (16...a5 17.e4+/–) 17.Nc5 Nc8 (17...h6 18.a4+/–) 18.Rfe1 (18.e4 Qf4 19.ef5 Qd2 20.fg6 hg6+/–) 18...Nb6 (18...Ra7 19.a4+/–) 19.e4 Nc4 (19...Qf4 20.Qc2 de4 21.Be4 Be4 22.Nde4+/–) 20.Nc4+– (20...dc4 21.Qa2+–; 20.ef5?! Nd2 21.Re8 Re8+=) 1–0. 73DADDELDU37 – seki@, mySchach.de, 2005.

4.d3 Bg7

5.Nd2 c6 6.g3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.a3 Bg7 4.d3 0–0 5.Nd2 d5 6.g3 c6).

5.g3 0–0 6.Bg2 c6 7.Nd2 (--> 1.b4 Nf6 2.Bb2 g6 3.a3 Bg7 4.d3 0–0 5.Nd2 d5 6.g3 c6 7.Bg2).

4.e3 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.a3 d5).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

3.a4 e6

4.b5 c6 5.Nf3 Nbd7 6.e3 c5 (6...Bd6 7.Be2+=) 7.c4 (7.Be2 Bd6=) 7...Nb6 (7...Bd6 8.Be2=) 8.cd5 (8.d3 Bd6=) 8...Nbd5 9.Bc4 (9.d4 cd4 10.Bd4 Bb4 11.Nbd2 Nc3+=) 9...Be7 (9...Bd6 10.d4=) 10.0–0 0–0 11.d4 cd4 (11...Qd6 12.Nbd2 cd4 13.e4+=) 12.Qd4+= b6 (12...Nb4 13.Rc1=) 13.Nbd2 (13.Rd1 Bb7+=) 13...Bc5 (13...Bb7 14.Rfd1+=) 14.Qd3 (14.Qh4 Bb7+=) 14...Bb7 15.Rac1 (15.Rad1 Rc8+=) 15...Nb4 (15...Qe7 16.Bd4=) 16.Qb3 (16.Qb1 Bd6+=) 16...Rc8 17.Rfd1 Nbd5 (17...Qe7 18.Bd4=) 18.Ng5 (18.e4 Nb4+=) 18...h6 (18...Ng4 19.Nge4 Nde3 20.Be6 (20.Nc5?? Qh4 21.Qe3 Qh2 22.Kf1 Ne3 23.fe3 Rc5–+) 20...Nd1 21.Bc8 Ngf2 22.Rc5 Be4 23.Ne4 bc5 24.Nf2 Nb2 25.Qb2–+) 19.Nge4+= Ne4 (19...Nd7 20.Nf3+=) 20.Ne4+/– Qh4 21.Nc5 bc5 22.Qd3 (22.a5 Qg5 23.Rd2 Rfd8+/–) 22...Qg4 (22...Nb6 23.Qe2=) 23.h3 (worse is 23.Bd5 Bd5 (23...ed5 24.f3 Qe6 25.Qc3+/–) 24.Qf1 Qa4+=) 23...Qg5 24.Qe4 Ba8 25.h4 (better is 25.Bd3 g6 26.h4+=) 25...Qe7?? (better is 25...Qh5 26.Bd3 Nf6+/–) 26.Bd5+– Bd5 27.Rd5 1–0. Wall,Bill – Fifa,Brian, internet, 2006.

4.b5 Bd7 5.c4 c6 6.e3 Be7 7.Nf3 a6 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 0–0 11.Ne5 dc4 12.Nd7 (12.Bc4 Be8=) 12...Qd7 (12...Nbd7 13.Bc4 Ne5 14.Be2 Nd3 15.Bd3 Qd3 16.Qb1 Qb1 17.Nb1 cb5 18.Ke2+=) 13.Bc4= cb5 14.Bb5 Nc6 15.d4 Bb4 16.Ke2 (better is 16.0–0=) 16...Bc3–/+ 17.Bc3 Nd4! 18.Bd4 (18.ed4 Qb5) 18...Qb5 19.Ke1 Rc8 20.Qd1 Ne4 The mate threat is Qa5 21.f3 Qb4 (21...e5!? 22.fe4 ed4 23.Kf2 de3 24.Kf3 Qh5 25.g4 Qh3 26.Kf4–+) 22.Kf1 (22.Ke2 Qc4 23.Ke1 e5 24.fe4 ed4–+) 22...Qc4 23.Kg1?? (23.Ke1 e5! 24.fe4 ed4 25.Kf2–+) 23...Qc1 24.h3 (24.Qf1 Nd2 25.Qc1 Rc1 26.Kf2 Rh1–+) 24...Qd1 25.Kh2 Qh1 26.Kh1 Nf2 27.Kg1 Nd3 28.f4 f6 29.Kf1 e5 30.fe5 fe5 31.Bb6 e4 32.g3 Rc6 33.Bd8 b5 34.h4 b4 35.Be7 b3 36.Kg2 b2 (36...b2 37.Bf8 Rc2 38.Kh3 Nf2 39.Kg2 b1Q 40.g4 Nh1 41.Kh3 Qf1#; 36...Rc2 37.Kh3 Nf2 38.Kg2 Ng4 39.Kf1 b2 40.Bb4 b1Q 41.Be1 Ne3 42.Kg1 Qe1#) 0–1. Jolayxvort,J – Frowein,Helge, Dortmund op, 1987.

4.Bc3 =+.

4.Nf3 Bb4–/+ 5.g3 Nc6 6.Bg2 Qe7 7.0–0 Bd7 8.Na3 Bd6 9.c4 d4 (better is 9...0–0–/+) 10.Nd4? (10.Nb5 0–0 11.Nfd4 e5 12.Nd6 cd6= (worse is 12...Qd6 13.Nc6 Bc6 14.Ba3+/–)) 10...0–0?? (better is 10...Nd4 11.Bd4 Ba3–+) 11.Ndb5= a6 12.Nd6 Qd6 13.d4 Rfd8 14.d5 ed5 15.cd5 Ne5 16.Rc1 Bg4 (16...Re8 17.e4 Qb4 18.Qd4+/–) 17.h3 (17.Nc4 Nc4 18.Rc4 b5+/–) 17...Bf5 18.Nc4 Nc4 19.Rc4 b6 (19...c6 20.Rf4 Bg6 21.Bf6 gf6 22.Qb3+/–) 20.e4 Ne4? (20...b5 21.Bf6 gf6+/–) 21.Qd4?? (21.Be4 b5 22.Qd4 Qf6+–) 21...f6? (better is 21...Nf6=) 22.Be4+– Be4 23.Qe4 Re8 24.Qg2 Rad8 25.Rd1 a5 26.Rc6 Qe7 27.Kh2 h6 28.Qf3 Kh7?! 29.Qf5 Kh8 30.Rf6! gf6 31.Bf6 Qf6 32.Qf6 Kh7 33.Qf7 Kh8 34.Rd4 Rf8 35.Qc7 Rf2 36.Kg1 Rff8 37.Qb6 Ra8 38.Qh6 Kg8 39.Qg6 Kh8 40.Rh4# 1–0. Salvatore – pieeater, ChessWorld.net, 2013.

4.b5 a5

5.e3 Nbd7 6.d4 Nb6 (6...Bb4 7.c3 Bd6 8.Ba3+=) 7.Nd2 c6 8.bc6 bc6 9.Ngf3 c5 10.Ba3 (10.Bb5 Bd7=) 10...c4 11.Bf8 Kf8 12.Ne5 Nfd7 (12...Bd7 13.c3=) 13.f4 (13.Ng4 f5 14.Ne5 Ne5 15.de5 Bd7+=) 13...Ne5+= 14.fe5 Bd7 Attacks the isolani on a4 15.c3 Qe8 Increasing the pressure on the isolated pawn on a4 (15...Kg8 16.e4+=) 16.Be2 Na4 (16...Ba4 17.Qb1 Rb8 18.0–0=) 17.Qc1 Ke7 (17...f5!?=) 18.Qa3+= Kd8 19.0–0 (better is 19.Bd1!? Nb6 20.Qc5+=) 19...Qe7+= 20.Qc1 Kc7 (20...Qg5 21.Nf3 Qh6 22.Qd2+=) 21.Bd1 (21.Qc2 Nb6+=) 21...Nb6= 22.Qb2 (22.e4!?=) 22...Rhb8+= 23.Qc2 g6 (23...f5 24.ef6 gf6 25.e4+=) 24.Nf3 (24.e4 Kd8=) 24...a4 25.h4 (25.e4 Kd8+=) 25...h6 26.Qf2 a3 (26...Kd8 27.Nd2–/+) 27.Nh2+= Be8 28.Ng4 Na4 29.Ba4= Ra4 30.e4 Rb2 31.ed5 Rf2–/+ 32.d6 Kd7 33.de7 Rb2 34.d5? Re2?? 35.d6+– Re4?? 36.Nf6 (36.Nf6 Kc6 37.Ne8+–) 1–0. Tappenbeck – Van Boemmel,Gerald, Sueder Sommer op, 1996.

5.e3 Nbd7 6.Nf3 Bd6 7.d3 (7.d4 0–0=) 7...0–0 8.Nbd2 Re8 (8...Rb8 9.Be2=) 9.Be2= e5 10.0–0 c5 11.c4 e4 12.de4 (12.Ne1 Qc7 13.Kh1 dc4 14.Nc4 Bh2=) 12...de4+= 13.Ng5 (13.Ne1 Qc7 14.h3 Ne5+=) 13...Qc7 14.h4 h6 15.Nh3 Nf8 (15...Ne5 16.Nf4+=) 16.f4 (16.Bf6 gf6 17.Bg4=) 16...Ng6 (16...ef3 17.Rf3 Ng4 18.e4+=) 17.Qe1 (17.Nf2!? Qe7 18.Bf6 gf6 19.h5 Nf4 20.Nfe4=) 17...Ng4 (17...Bh3 18.gh3 Qe7 19.h5=) 18.h5 (better is 18.Ra3=) 18...Nf8 (better is 18...Ne3 19.hg6 Nf1 20.Bf1 Bh3 21.gh3 f5+= (21...fg6?! 22.Ne4 Re6 23.Bg2=)) 19.Qg3+/– f5 20.Nf2 (better is 20.Bg4 fg4 21.Nf2+/–) 20...Ne3+= 21.Qe3 Bf4 22.Qc3 Be5 23.Qb3 Bb2 24.Qb2 e3 25.Nh3 ed2–/+ 26.Qd2 Be6 27.Nf4 Rad8 28.Qc2 Rd4 29.Ne6 Ne6 30.Qf5 Rh4 31.Bf3 Qh2–/+ 32.Kf2 Nf4 33.Rh1?? Re2! 34.Be2 Qg2 (34...Qg2 35.Ke1 Qe2) 0–1. Miras,Eduardo – Grau,Jose Maria, Asturias Asturias.Pref, 1995.

4.b5 a6

5.Nf3 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4 Be7 9.e3 0–0 10.Be2 Nbd7 11.0–0 b6 12.d3 Bb7 13.Nbd2 Qc7 14.Qc2 Ra8 15.Bb2 Ne8 16.Ra1 Ra1 17.Ba1 g6 18.h3 Bf6 19.Bf6 Nef6 20.d4 cd4 21.Nd4 Kg7 22.cd5 Qc2 23.Nc2 Nd5 24.Bf3 f5 25.Nb4 Nc5 26.Bd5 ed5 27.Nf3 Kf6 28.Nd4 Ke5 29.Kf1 Kd6 30.Ke2 Bc8 31.Na2 Na4 32.Kd2 Bd7 33.Nc3 Nc3 34.Kc3 Kc5 Attacks the isolani on b5 35.h4 ½–½. Degterev,Pavel (2275) – Martys,Mark (2290), CP–2005–S–00006, 2008.

5.Nf3 Bd6 6.e3 0–0 7.c4 c6 8.Be2 Qc7 (8...ab5 9.cb5 c5 10.0–0=) 9.cd5 (9.Bf6 gf6 10.cd5 cd5=) 9...Nd5 10.Nc3 Nc3 11.Bc3 e5 12.Qb1 ab5 13.ab5 Ra1 14.Qa1 f6 15.d4 ed4 16.Bd4 (worse is 16.ed4 Re8–/+) 16...cb5 17.0–0 b4 18.Rc1 Nc6 19.Bc5 Be6 20.Bd6 Qd6 21.Rd1 Qc5 22.Rc1 Qb6 23.Bc4 (23.Qb1 Qa5=) 23...Bc4+= 24.Rc4 Rd8 25.h3 b3 26.Qb1?? (better is 26.Rc1+=) 26...b2–+ 27.Nd4 Ra8 (27...Nd4 28.ed4 Ra8 29.Kh2–+) 28.Nc2 Qb3 29.Rc5 Qa2 (29...Qa2 30.Qa2 Ra2–+) 0–1. Carzolio,Luigi (2035) – Napoli,Nicolo (2125), Salsomaggiore Terme op 8th, 2004.

5.g3 Nbd7 6.Bg2 Nc5 7.d3 Bd7 8.c4 Be7 9.Nd2 0–0 10.Ngf3 dc4 11.dc4 ab5 12.ab5 Ra1 13.Qa1 b6 14.0–0 Ne8 15.Bg7?? (better is 15.Rd1+=) 15…Ng7–+ 0–1. Jokmin,Alex – Zimmermann,Jan Erik, ZN–2010–0–01125, 2010.

4.b5 b6

5.e3 c5 6.Nf3 Nbd7 (6...Bd6 7.Be2=) 7.Be2 Bd6+= 8.0–0 Qc7 (8...0–0 9.d3=) 9.g3 (9.a5 0–0=) 9...0–0+= 10.Ng5 (10.d4 a6+=) 10...e5 (10...h6 11.Nh3+=) 11.f4+= h6 (11...e4 12.a5+=) 12.Nh3 d4 (12...a6 13.fe5 Be5 14.Be5 Ne5 15.Nf2+=) 13.Na3= de3 (13...Re8 14.a5=) 14.de3 (14.Nc4 Rd8=) 14...ef4 (14...e4 15.Qd2+=) 15.ef4 (15.Nc4 Be5 16.Ne5 Ne5 17.Nf4 Bb7=) 15...Be7 16.c4 (16.Re1 Re8=) 16...Rd8 (16...Bb7 17.Bf3+=) 17.Qc2 (17.Bf3 Bb7=) 17...Bb7 18.Nf2 (18.Rae1 Re8=) 18...Ne8 (18...Re8 19.Rad1=) 19.Ng4 Nef6 (19...Nd6 20.Bf3=) 20.Qc3 (20.Rae1 a6=) 20...Nf8 (20...a6 21.Rae1=) 21.Nc2 (21.Qe3 Ng4 22.Bg4 Ng6=) 21...Ne6 (21...a6=) 22.Nce3 (22.Qe3 Ne4=) 22...Ne4 (22...Nd4!? 23.Rae1 Ne4–/+ (worse is 23...Ne2 24.Re2 Be4 25.Rfe1+/–)) 23.Qe1+= Nd4 24.Rd1 Rd6 25.Nd5–/+ Rd5 26.cd5 Nc2 27.Bf3 Ne1 28.Be4 Bd6 29.Rfe1 a6 30.Ne5 ab5 31.ab5 f6 32.Nc4 Bc8 33.Ra1 Ra1–/+ 34.Ra1 Bd7 35.Ra8–/+ Kf7 36.Ne3? Bb5 37.Nf5 c4?? 38.Nd6+– Qd6 39.Ba3 (39.Ba3 Bc6 40.Bd6 Ba8 41.Bc7+–) 1–0. Norbeck,Ivar – Bengtsson,Torsten, corr SSKK 2–61, 1985.

5.e3 Bd6 6.Nf3 =.

5.Nf3 Nbd7 6.e3 Bd6 7.Be2 Rf8 (7...a6!?=) 8.0–0+= h6 9.a5 e5 (9...ba5 10.Bc3+=) 10.d3 (better is 10.d4 e4 11.Ne5+/–) 10...Nb8? (better is 10...Qe7!?+=) 11.Ne5 Nbd7?? (better is 11...ba5 12.c4 a6 13.Ra5 c5+–) 12.Nc6 Bh2 13.Kh2 Ng4 14.Bg4 Qh4 15.Bh3 Nb8 16.Nb8 Rb8 17.Qf3 g5 18.Qf6 Rg8 19.Qc6 Bd7 20.Qd7 Kf8 21.Qc7 Re8 22.Qd6 Re7 23.Bf6 (23.Bf6 Rg7 24.Qe7 Kg8 25.Qd8 Kh7 26.Qf8 Qf4 27.ef4 Kg6 28.Qg7 Kh5 29.Qf7 Kh4 30.g3#) 1–0. Stummerer,Alfred (2190) – Popiak,Detlef (2060), remoteschach.de, 2006.

5.Nf3 Be7 6.e3 c5 (6...0–0 7.Be2=) 7.bc6 (7.Be2 0–0=) 7...Nc6 8.Be2 0–0+= 9.0–0 Bb7 10.d3 (10.Ba3 Ba3 11.Na3 Ne4=) 10...Qc7 (10...Rc8 11.Na3+=) 11.Na3 a6 12.c4 Rfd8 13.Rc1 Rac8 14.cd5 Rd5 (14...Nd5 15.Nc4=) 15.Nd4 (15.Qb3 Rh5=) 15...Rc5 (15...Qd8 16.Nc6 Rc6 17.Rc6 Bc6=) 16.Nc6 (16.Rc5 Bc5 17.Nc6 Qc6=) 16...Qc6+= Threatening mate... how? (16...Bc6?! 17.Rc5 Bc5 18.Bf6 Ba3 19.Bg7=; 16...Rc6?! 17.Rc6 Bc6 18.Qb3+=) 17.e4 h6 (17...Rc1!? 18.Bc1 Qc7+=) 18.Nc4= Qc7 19.Bd4 Rc6 20.Qb3 Nd7 21.Qb2 Bf6 22.f4?? (better is 22.Bf6 Nf6 23.Rc3=) 22...Bd4–+ 23.Qd4 b5 24.ab5 ab5 25.Kh1 (25.e5 Rc5–+) 25…bc4 (25...bc4 26.dc4 Nb6–+) 0–1. Bizunowicz,Stanislaw – Pajor,Mieczyslaw, corr, 1978.

4.b5 c5

5.c4 d4 6.h3 e5 7.d3 Bf5 8.e3 Nbd7 (8...Bd6 9.g4 Bc8 10.Bg2+=) 9.Nf3 (9.Qf3!? Be6 10.Qb7 Qa5 11.Nd2=) 9...de3 10.fe3 e4 11.de4 Be4 12.Bd3 Be7 13.0–0 Nb6 (13...0–0 14.Ra3 Qc7 15.Nbd2 Bd3 16.Rd3=) 14.Be2 0–0 15.Nc3 Qd1 16.Rfd1 Bf3 (16...Bc2!? 17.Rdc1 Bf5+=) 17.gf3+/– Rfd8 18.a5 Nbd7 19.Nd5 Nd5 20.cd5 Bf6 21.Bf6 Nf6 22.e4 b6 23.Bc4 Nd7 24.f4 g6 (24...ba5 25.Ra5 Nb6 26.Be2+/–) 25.e5 ba5 26.Ra5 Kf8 (better is 26...g5!? 27.e6 Nb6+/–) 27.d6+– h6 (27...g5 28.Bd5 gf4 29.Ba8 Ra8+–) 28.e6?? (better is 28.Bd5 g5 29.Ba8 Ra8 30.Rda1 gf4 31.Ra7+–) 28...fe6+/– 29.Be6 Nb6 30.f5 gf5 31.Ra2 f4?? (31...Kg7 32.Bf5 Nc4 33.Be4+/–) 32.Rf2 (better is 32.Rg2 Rd6 33.Rd6 Ke7+–) 32...a5?? (32...Kg7 33.Rf4 Rf8 34.Rg4 Kf6 35.Re4+/–) 33.ba6 (33.Rg2 Rd6 34.Rd6 Nc8 35.Rd8 Ke7 36.Rc8 Rc8 37.Bc8 Kd8+–) 33...Ra6? (33...Kg7 34.Rf4 Ra6 35.Kf2+–) 34.Rf4 (better is 34.Rg2 Rd6 35.Rd6 Ra1 36.Kf2+–) 34...Kg7 35.Rf7 Kg6?? (better is 35...Kh8 36.Rdf1 Raa8+–) 36.Kh1 c4 (36...Ra4 37.Rg1 Kh5 38.Rf5 Kh4 39.Bf7 Kh3 40.Rh5 Rh4 41.Be6) 37.Rg1 Kh5 38.Rf5 Kh4 39.Rg4 Kh3 40.Rf3 1–0. marinscrofan – radboud (1780), gameknot.com, 2008.

5.bc6 Nc6 6.e3 Bd6 7.Nf3 0–0 8.c4 e5 9.Be2 (9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 e4+=) 9...e4 10.Nd4 Ne5 11.Qb3 (11.Na3!?–/+) 11...dc4–+ 12.Bc4 a6 13.Nc3 Qc7 14.Be2 Bg4 15.Nd5 (15.f3 ef3 16.gf3 Bh3=) 15...Nd5+= 16.Qd5 Be2 17.Ke2 Qc4 (17...Nd3!? 18.Nf5 Nb2–/+) 18.Qc4+= Nc4 19.Bc3 g6 20.d3 ed3 21.Kd3 Rac8 22.Rab1 Ne5 23.Kd2 Rc7 24.Bb4 Rfc8 25.Bd6 Nc4 26.Ke2 Nd6 27.Rb6 Ne4 28.a5 Kf8 29.Kf3 (29.Ra1!?=) 29...Nd2–/+ 30.Ke2 Nc4 31.Rb4 Na5 32.Rhb1 b5 33.R4b2 Nc6 34.Ra1 Nd4 35.ed4 Rc2 36.Rc2 Rc2 37.Ke3 Rc6 38.Ke4 Ke7 39.g4 Kd6 40.f4? (better is 40.Ra3–+) 40...b4 41.Ra4 (41.Rb1 Rb6 42.Kd3–+) 41...Rb6 0–1. Kutalkova,Sarka – Olsar,Z (1945), Karvina Open, 2015.

5.bc6 Nc6 6.e3 g6 7.Nf3= Bg7 8.Be2 0–0 9.0–0 Qb6 10.Ba3 Re8 11.Nc3 (11.d4 Qc7=) 11...Ne4 12.Ne4 Ba1?? (12...de4 13.Ng5 Ba1 14.Qa1=) 13.Qa1?? (13.Nd6 Bb2 14.Bb2+– (14.Ne8?! Ba3 15.Qa1 Bb2=)) 13...de4= 14.Rb1 (better is 14.Ng5!? Qa5 15.Ne4+=) 14...Qc7 (14...Qa5 15.Nd4 Qd2–/+ (15...Qa4 16.Bb5 Qa5 17.Nc6 bc6 18.Bc6+/–)) 15.Qc3?? (better is 15.Ng5 f5 16.d4–/+) 15...ef3–+ 16.Bf3 Bd7 17.Bc6 (17.Qf6 Nd8–+) 17...Bc6 18.Bb2 e5 19.f4 (19.d3 Qd7 20.a5 Rac8–+) 19...f6 (19...Qd8!? 20.d3 Ba4 21.Qd2–+) 20.fe5 fe5 21.Qb3 Kg7 22.Rf1 (22.d3 Qb6 23.d4 Qa5–+) 22...Re7 (22...Qd7 23.Qb4–+) 23.d4 Kh6 (23...Qa5 24.Ba3 Rd7 25.Qe6–+) 24.de5 (24.d5 Be8–+) 24...Rd8 (24...Qa5 25.e4 Qb6 26.Rf2 Qb3 27.cb3–+) 25.c4? (25.Qc4 g5 26.Qg4 Qb6= (26...Re5?? 27.Rf6 Kg7 28.Rf5+–)) 25...Re5 (25...Qd7 26.Bd4–+) 26.Be5 (26.e4–+) 26...Qe5 27.Qb4 (27.Re1–+) 27...Qe3 28.Kh1 Qe2 0–1. tanto – plmackenzzie, net–chess.com, 2001.

5.d3 Nbd7 6.Nf3 +=.

5.d3 Be7 6.e3 (6.Nf3 Nbd7=) 6...0–0 (6...a6 7.Nd2+=) 7.Nf3 a5 (7...a6 8.Nbd2=) 8.Be2 (8.g3 b6=) 8...Nbd7 9.Nbd2 (9.0–0 b6=) 9...Qc7 (9...b6 10.0–0=) 10.0–0 b6 11.d4 (11.h3 Bb7=) 11...Bb7+= 12.dc5 (12.Rc1 c4 13.c3 Ne8+=) 12...Nc5 (worse is 12...Qc5 13.Ba3 Qa3 14.Ra3 Ba3 15.Nd4+=; 12...Bc5?! 13.c4+=) 13.Be5 (13.Ne5 Nfe4+=) 13...Qd7 (13...Bd6 14.Bf6 gf6 15.g3+=) 14.Re1 (14.Bd4 Rfc8+=) 14...Rac8 (14...Rad8 15.h3+=) 15.Bd4 (15.h3 Nfe4–/+) 15...Rfd8 (15...Qc7 16.c4–/+) 16.h3 (16.Ne5 Qc7+=) 16…Qe8 +=. Massoni,Luigi – Angelov,Hristo, UECC, 1999.

5.e3 a5 6.c4 b6 (6...Bd6 7.Nf3=) 7.Nf3 Nbd7 (7...Bb7 8.Be2=) 8.Be2 (8.Nc3 Bb7=) 8...Bb7 (8...Bd6 9.0–0=) 9.0–0 Bd6 10.d4 (10.cd5 Bd5 11.d3 0–0=) 10...Qc7 (10...0–0 11.cd5 Bd5 12.Nc3=) 11.Nbd2 (11.cd5 Bd5 12.Nbd2 cd4+=) 11...0–0 (11...cd4 12.ed4 0–0 13.Rc1=) 12.Rc1 Ne4 13.h3 (13.cd5 Bd5 14.Nc4 Rfd8=) 13...f5 (13...Rac8 14.cd5 Bd5 15.Ne4 Be4 16.Nd2=) 14.Ne4 fe4 15.Ng5 Rfe8 16.Bh5 (16.Bg4 Nf8 17.h4 Rad8=) 16...Re7= 17.f3 h6 18.Bf7 Rf7 19.Nf7 Kf7 20.fe4 Opening the f–file gets White a lot of play 20...Kg8 21.Qg4 Nf8 (21...de4?? 22.Qe6 Kh7 23.Rf7+–) 22.cd5 ed5 23.e5 Be7 24.e6 (better is 24.dc5 Bc5 25.e6+=) 24...h5? (24...Bc8 25.dc5 Ne6 26.cb6 Qb6+/–) 25.Qh5+/– Bf6 26.Qg4 (better is 26.Rf6!? gf6 27.dc5 bc5 28.Bf6+–) 26...Qe7+= 27.Rf6 (27.dc5 Bb2 28.Rf7+=) 27...Qf6+= 28.Rf1 Qh6 29.dc5 bc5 The passed pawn on b5 will quickly become a dangerous weapon (better is 29...Ne6 30.Bd4 A) 30...bc5? 31.Rf6 Qg5 32.Qe6 (worse is 32.Re6 Qg4 33.hg4 cd4–/+) 32...Kh7 33.Qf7+–; B) 30...Nd4?! 31.ed4 Qe3 32.Kh2=; C) 30...Nc5=) 30.Rf7+/– Threatening mate... how? 30...Ne6 (30...d4!? 31.ed4 Bd5 32.dc5 Ne6+/–) 31.Rb7+– Qe3 (31...Re8 32.Kh2 d4 33.ed4+–) 32.Kh1 Do you see the mate threat? 32...d4 (32...Qh6 33.Re7 Nd4 34.Qd7+–) 33.Re7 Rf8 34.Qe6 (34.Re6?! Rf1 35.Kh2 Qg1 36.Kg3 Qf2 37.Kh2 Qg1 38.Kg3 Qf2 39.Kh2 Qg1=) 34...Qe6 35.Re6 Rf2 36.Bd4 (better is 36.Ba3!? d3 37.Kh2+– (37.Bc5?! d2 38.Re8 Kh7+/–)) 36...cd4 37.Rd6 Rd2 38.b6 (38.Rd8 Kf7+–) 38...Rb2 (38...Kh7!?+–) 39.Rd4 Rb6 40.Rd5 (40.Rd8!? Kf7 41.Ra8 Ke7+–) 40...Ra6 41.Rf5 g6 42.Rc5 Kg7 43.Kh2 Kh6 44.h4 Ra8 45.Kg3 Ra7 46.Kg4 Ra8 47.g3 (47.Re5 Ra7+–) 47...Ra7 48.Kf4 (better is 48.Re5+–) 48...Rb7 (better is 48...Ra6+–) 49.Ra5 Rb4 (49...Rc7 50.Ra8+–) 50.Kf3 Rb3 51.Kg4 Rb4 52.Kh3 Rc4 (52...Kg7 53.g4+–) 53.Ra8 (53.Ra7 Rc1+–) 53...g5 (53...Kg7 54.a5+–) 54.Ra6 Kg7 55.hg5 Rb4 (55...Rd4 56.a5+–) 56.a5 Ra4 57.Ra8 Rb4 (57...Kg6 58.a6+–) 58.a6 Ra4 59.Kg2 (59.g4 Ra3 60.Kg2 Kg6+–) 59...Ra3 (59...Ra5 60.a7+–) 60.Kf2 (60.a7 Kh7+–) 60...Kh7 61.g4 Ra5 62.Kf3 (62.a7 Ra3+–) 62...Kg7 (62...Rg5 63.Rb8 Ra5 64.Rb6+–) 63.Kf4 Kh7 (63...Ra4 64.Ke3+–) 64.Ke4 (64.a7 Kg7+–) 64...Kg7 (64...Rg5 65.Kf4 Ra5 66.a7+–) 65.Kd4 (65.a7 Kh7+–) 65...Kh7 (65...Rg5 66.a7 Ra5 67.g5+–) 66.Kc4 Rg5 67.Rd8 (67.Rd8 Ra5 68.Rd7 Kg6 69.a7+–) 1–0. Zhitenev – Shamkovich,Leonid, Moscow, 1963.

5.e3 a5 6.Be2 Be7 (6...Bd6 7.Nf3=) 7.Nf3 0–0 8.0–0 Nbd7 9.c4 Nb6 (9...dc4 10.Qc2=) 10.Qc2 (10.d3 Bd6=) 10...dc4 (10...Nc4 11.Bc4 dc4 12.Qc4=) 11.Bc4 (11.Na3 c3 12.dc3 Qc7=) 11...Nc4+= 12.Qc4 Qd5 13.Qh4 (13.Rc1 Qc4 14.Rc4 Rd8=) 13...Qh5?? (better is 13...Rd8+=) 14.Bf6+– (14.Bf6 Qh4 15.Bh4 Bh4 16.Nh4+–) 1–0. Goodwin,W – Kasparek, Burlingame California, 1990.

5.e3 a5 6.Nf3 Bd6 7.c4 Nbd7 8.d4 0–0 9.Bd3 (9.cd5 ed5 10.dc5 Nc5=) 9...Qc7 (9...cd4 10.Nd4 Bb4 11.Bc3 Bc3 12.Nc3+=) 10.Nbd2 (10.cd5 Nd5 11.Nbd2=) 10...Nb6 (10...cd4!? 11.ed4 dc4=) 11.Rc1 (11.dc5 Qc5 12.Bd4 Qc7+=) 11...Nfd7 (11...Nbd7 12.cd5 ed5 13.dc5 Nc5 14.Bb1+/–) 12.cd5 Nd5 13.0–0 b6 14.Bb1 (14.Nc4 Bb7+/–) 14...Bb7+= 15.e4 (15.Nc4 Rac8=) 15...Nf4 (15...Nb4 16.Qe2+=) 16.e5 Be7 17.Ne4 (17.dc5 Nc5 18.Rc4 Ng6+=) 17...Ng6 (17...Rac8 18.Qd2 f5 19.Nd6 Bd6 20.Qf4+=) 18.h4 (18.dc5 bc5 19.Qc2 Rfd8+=) 18...h6= (18...Nh4 19.Nh4 Bh4 20.dc5 bc5 21.Qh5+–) 19.h5 Nf4 20.dc5 (20.Qc2 Rfd8+= (20...Nh5? 21.Ng3 g6 22.Nh5+–)) 20...Nc5= 21.Nd6 (21.Qc2 f5 (21...Nh5?? 22.Nc5 g6 23.Nb7 Qb7 24.Qc6+–) 22.ef6 gf6=) 21...Nh5 (21...Rad8 22.Qc2 f5 23.ef6 Bd6 24.Qh7 Kf7 25.Bg6 Ng6 26.hg6 Ke8 27.fg7 Rd7+–) 22.Qc2+= g6 23.Nf7 Rf7 (23...Nf4 24.Nh6 Kg7 25.Ng4 Bf3 26.gf3=) 24.Qg6+/– Rg7 25.Qh5 Rf8 (better is 25...Bd5 26.Bd4 Rf8+=) 26.Kh1 (better is 26.Ne1+/–) 26...Bf3–/+ 27.gf3 Bg5?? (27...Rf4 28.Rc5 A) 28...Bc5?! 29.Qe8 Bf8 30.Qe6 Qf7 31.Qf7 (31.Qh6?? Rh4 32.Qh4 Qf3 33.Kh2 Qg2) 31...Kf7 32.e6 Ke7 33.Bg7 Bg7 34.Rc1 Ke6 35.Rc6 Ke5 36.Be4+=; B) 28...bc5?! 29.Qe8 Rf8 30.Qh5–/+; C) 28...Qc5 29.Qe8 Rf8–+) 28.Rc4= Qf7 (28...Qd7 29.Rd4 Qf7 30.Qf7 Rgf7 31.Rc4=) 29.Qf7+= Rgf7 (29...Rff7 30.Be4 Rf4–+) 30.Rc5 (better is 30.Be4!?+=) 30...bc5+= 31.Be4 Rf3 (31...Rg7!? 32.Rg1 Bf4+=) 32.Bf3= Rf3 33.Bc1 Be7 (33...Bc1 34.Rc1 Kf7 35.Rc5+/–) 34.Be3 (34.Kg2 Rf5+=) 34...Rf5 (34...h5!?+=) 35.f4+/– 1–0. epiglotis (2720) – jupiter (2410), net–chess.com, 2002.

5.e3 c4 6.d3 Qa5 7.Qd2 (7.Bc3 Qc7 8.dc4 Ne4 9.Nf3 Nd7 10.Qd3 Ndf6 11.Nbd2 dc4 12.Nc4 Nc3 13.Qc3 Nd5) 7...Qd2 8.Kd2 (8.Nd2 cd3 9.Bd3 Nbd7= 10.Ngf3 Nc5 11.0–0 Bd7 12.Ne5 Bd6 13.Be2 0–0) 8...cd3 (8...Nbd7 9.Nf3 cd3 10.Bd3 Bd6 11.Nc3 Nc5 12.Ba3 Bd7 13.Ne5 Nce4) 9.Bd3 Nbd7 10.f3 (10.Bf6 Nf6 11.c4 (11.Nf3 Bd7 12.Nc3 Bd6 13.a5 Rc8) 11...Bb4 (11...Bd7 12.cd5 Bb4 13.Nc3 Nd5) 12.Ke2 dc4 (12...e5 13.cd5 e4) 13.Bc4 b6=; 10.Nf3 Bd6 11.Nc3 Nc5 12.Ba3 Bd7 13.Ne5 Nce4) 10...Bd6 (10...e5 11.a5–/+ (11.Ne2 Bb4 12.Nbc3 e4 13.fe4 de4) 11...Bb4 12.Ke2 0–0 13.Nh3 Re8) 11.g4 (11.Nc3 Nc5 12.Nge2 0–0 13.g4 Bd7) 11...0–0 12.Ne2 (12.g5 Ne8+= (12...Nh5 13.Ne2 Nc5) 13.Nh3 f6) 12...Ne5 (12...h6 13.Nbc3 Ne5) 13.Nd4 (13.Be5 Be5) 13...Nd3 (13...Re8 14.g5 Nfd7 15.f4+=) 14.cd3 e5 (14...Re8 15.Rc1+=) 15.Nf5 (15.Nb3 h6=) 15...Bf5+= 16.gf5 a6 17.Rg1 (17.Ba3 Ba3 18.Na3 Rfc8+=) 17...ab5–/+ 18.ab5 Ra1 19.Ba1 Ra8 20.Nc3? (better is 20.Bb2–/+) 20...d4–+ 21.ed4 (21.Rc1 dc3 22.Bc3 Nd5–+) 21...ed4 0–1. Talbot,Nathan – Murphy,James, 2009.

5.e3 c4 6.d3 cd3 7.Bd3 Be7 8.Nf3 a6 9.0–0 0–0 10.c4 dc4 11.Bc4 ab5 12.ab5 Ra1 13.Ba1 Nbd7 14.Nc3 (14.Nbd2 Qc7+=) 14...Nb6 (14...b6!?=) 15.Qd8 Rd8 16.Bb3 Bd7 17.Nd4 (17.Rd1 Ra8=) 17...Bb4 18.Nce2 e5 19.Nc2 Bb5 20.Nb4 Be2 21.Re1 Bc4 22.Bc2 (22.Be5 Bb3 23.Bc7 Rd2 24.Bb6 Nd5 25.Nd5 Bd5=) 22...Nfd7 23.Be4 (23.f4 ef4 24.ef4 Nc5+=) 23...f6 (better is 23...Nc5!? 24.Bf5 f6–/+) 24.Bb7= Nc5 25.Bf3 Nba4 26.Nc6 Re8 (26...Rd2=) 27.Be2 (better is 27.Rc1 Bb3 28.Be2=) 27...Be2–/+ 28.Re2 Kf7 (28...Re6!? 29.Na7 Ra6–/+) 29.h3 Rc8 30.Na5 (30.Na7 Ra8 31.Nb5 Rb8–/+) 30...Ra8 (30...Nd3 31.Rd2 Rc1 32.Kh2 Nf2 33.Rf2 Ra1 34.Nc4–/+) 31.Nc6 Nb3 (31...Ra6 32.Nb4 Rb6–/+) 32.Be5? (better is 32.Ra2+=) 32...fe5–+ 33.Ne5 Kf6 34.f4 Nac5 35.Ng4 Ke7 36.Rc2 Ra5 37.Ne5 Ne4 (better is 37...Ra1 38.Kh2 Ke6–+) 38.Nc6+= Kd6 39.Na5 Nbc5?? (better is 39...Na5 40.Rc8 h5+=) 40.Nc4 (40.Nc4 Kd5 41.g4+–) 1–0. Scirocco – Putte5, Live Game Caissa's Web, 2004.

5.e3 c4 6.Be2 a6 7.Nc3 g6 (better is 7...e5!?+=) 8.Nf3+= Bg7 9.d3 cd3 10.cd3 0–0 11.d4 Nbd7 12.0–0 a5 13.Nd2 e5 14.e4 (better is 14.Nb3+=) 14...ed4–/+ 15.Nd5 (15.Ncb1!?–/+) 15...Nd5–+ 16.ed5 Nb6?? (better is 16...d3!? 17.Bg7 de2 18.Qe2 Kg7–+) 17.Qb3 (better is 17.Nc4!?+=) 17...Nd5+= 18.Bf3 (18.Rfe1 Nf4 19.Bf3 Be6–/+) 18...Nb4 (18...Be6 19.Rfe1–/+) 19.Rfe1+= Bh6 (19...Rb8!?+=) 20.Rad1= d3 (20...Bg7 21.Ba3=) 21.Re4 (21.Ne4!? Bg7 22.Bg7 Kg7 23.Qc3 f6 24.Nc5+/–) 21...Bg7 (21...Bf5 22.Qc3 f6 23.Rc4=) 22.Bg7 Kg7 23.Qb2 Kg8 24.Rc1 (24.Rf4 Qe7=) 24...Bf5 (24...Be6 25.Ree1 Nc2 26.Red1+=) 25.Rec4= Qb6 26.Rc7 Rab8 27.Re7 (better is 27.Qe5=) 27...Nc6?? (27...Nc2 28.Qe5 Qd4 29.b6 Qe5 30.Re5+=) 28.Bc6?? (better is 28.Qf6+–) 28...bc6= 29.Re5 (29.Qf6 Rbc8 30.h3 Qb8 31.bc6 Qb4=) 29...Rfe8 (29...cb5 30.Rb5 Qa7 31.Qf6–/+) 30.Rce1 (30.g4!? Bg4 31.Ne4=) 30...Re5–/+ 31.Re5 Qb7 (31...Qd8 32.Re1–/+) 32.Qc3+= Rc8 33.Rc5 (33.Qa5 cb5 34.Rb5 (34.Qb5 Rc1 35.Nf1 Qb5 36.Rb5 d2 37.Rb8 Kg7–+) 34...Rc1 35.Nf1–/+) 33...Qe7 (better is 33...cb5 34.ab5 a4–+) 34.Qe5?? (better is 34.bc6!? Qe1 35.Nf1 Qc3 36.Rc3=) 34...Re8?? (better is 34...Qe5 35.Re5 cb5–+) 35.Qe7–/+ Re7 36.Kf1? (better is 36.g4 Bg4 37.b6–/+) 36...Re2–+ 37.Nb3 (37.Nb1 cb5 38.Rb5–+) 37...Rb2 38.Rc6 (38.Ke1 Rb3 39.bc6 Rb1 40.Kd2 Rb2 41.Kd1 Rf2–+) 38...Rb3 (better is 38...Rb1 39.Nc1 d2 40.Ke2 dc1Q 41.Rc1 Rc1 42.Ke3–+) 39.Ke1 Rb2 (better is 39...Rb1!? 40.Kd2 Rb2 41.Ke1 Re2 42.Kf1–+) 40.Rd6 h5 41.Rd4 Kg7 42.h3 Kf6 43.g4 Ke5 44.Rd8 hg4 45.hg4 Be4 46.f3 (46.Rd7 Re2 47.Kd1 Rf2–+) 46...Kf4 (46...Kf4 47.fe4 Ke3–+ (47...Ke4?! 48.g5–+); better is 46...Bd5 47.Kd1 Bf3 48.Kc1 Rc2 49.Kb1–+) 0–1. Michael – Gross,Wilhelm, corr, 1978.

5.e3 Nbd7 6.g3 Bd6 7.d4 (7.Ne2 e5–/+) 7...b6 (7...cd4 8.Bd4 0–0 9.Bg2–/+) 8.Ba3 Bb7 9.Nf3 Qe7 10.c3 0–0 11.Nbd2 Rac8 12.Rc1 c4 (better is 12...e5!?–/+) 13.Bd6= Qd6 14.Bg2 Ne4 15.Ne4 de4 16.Nd2 f5 17.0–0 Bd5 18.f4 Nf6 19.h3 h5 (19...a6 20.Ra1+=) 20.Kh2 Qe7 21.Qe2 Qa3 22.Ra1 (better is 22.Qd1!?=) 22...Qc3–/+ 23.Rfc1 Qd3 24.Qd3 (better is 24.Qf2!? c3 25.Nb1–/+) 24...ed3–+ 25.a5? (25.Ra3–+) 25...Bg2 26.Kg2 c3 27.Nf3 Ne4 28.ab6 ab6 29.Ra3 (29.Ne5 d2 30.Rc2 Ra8–+) 29...d2 30.Nd2 (30.Rca1–+) 30...cd2 (30...Nd2?! 31.Rac3 Rc3 32.Rc3–+) 31.Rd1 Rc1 32.Rd2 Nd2 33.Rd3 (33.Ra2 Ne4–+) 33...Ne4 34.d5 (34.Ra3 Rfc8 35.Ra2 R8c2 36.Rc2 Rc2 37.Kf1 Ng3 38.Ke1 Re2 39.Kd1 Re3–+) 34...Rd8 (34...Rc2 35.Kf1 Ra8 36.Ke1 Raa2 37.Rd4 Re2 38.Kd1 Nc3 39.Kc1 Rec2) 35.Ra3 Rd5 (35...Rc2 36.Kg1 Rd5 37.Ra8 Kh7 38.Rd8 Rd8 39.g4 Rd1) 36.Ra8 Kf7 37.Ra7 Kf6 38.Kf3 Rf1 39.Kg2 Rf2 0–1. MasterofDisaster – Alfilnegro, Live Game Caissa's Web, 2004.

5.e3 g6 6.Nf3= Bg7 7.Be2 0–0 8.0–0 c4 (8...a6 9.d4=) 9.d3+= cd3 10.cd3 a6 11.Na3 Bd7 12.Rc1 ab5 13.ab5 Qe7 14.Nc2 (better is 14.Qb3!?+=) 14...Bb5+= 15.Ncd4 Bd7 (15...Ba4 16.Qd2+=) 16.Qb3= Bc6 17.Ra1 Nbd7 (better is 17...Ra1!? 18.Ra1 Rc8+=) 18.Ba3+/– Nc5 19.Qc2 Nfd7 20.Nc6 bc6 21.d4 Ra4?? (better is 21...Ra3!? 22.Ra3 Ne4+/–) 22.Bc5 (better is 22.Qa4! Na4 23.Be7+–) 22...Nc5 23.Ra4 Na4 24.Qa4 Rb8?! (24...c5+–) 25.Qc6 Rb2 26.Bb5 (26.Bd3 Rb3 27.Bb5 Bf8+–) 26...Qb4 (26...Bf8 27.Bd3+–) 27.Qc8 Bf8 28.Be8 f6 (28...Qb7 29.Qc1 Be7+–) 29.Qe6 (29.Qe6 Kg7 30.Qf7 Kh6 31.Qf6+–) 1–0. TeaCzar – nevets101, ChessWorld.net, 2010.

5.Nf3 a6 6.e3 Be7 7.c4 b6 8.Nc3 (8.Be2 0–0=) 8...Bb7 (8...0–0 9.Bd3+=) 9.cd5= ed5 10.d4 c4 11.Qc2 (11.Be2 0–0=) 11...Bb4 (11...0–0 12.Be2=) 12.Ba3 (12.Be2 ab5 13.ab5 Ra1 14.Ba1 0–0=) 12...a5 (12...Bc3 13.Qc3 ab5 14.ab5=) 13.Nd2 (13.Be2 Qe7 14.Bb2 0–0=) 13...Qe7 14.Qb2 0–0 (14...Nbd7 15.Be2=) 15.Na2?? (better is 15.Be2=) 15...Ba3–+ (15...Ba3 16.Qc2 Nbd7–+) 0–1. Blasig,Volker – Bestgen, 1980.

5.Nf3 c4 6.e3 g6 (6...Bb4!?=) 7.Be2 Bg7 8.d3 cd3 9.Bd3 0–0 10.0–0 b6 11.c4 dc4 12.Bc4 a6 13.Qc2 ab5 14.ab5 Ra1 15.Ba1 Bb7 16.Nbd2 Qc7 17.Nd4 Nbd7?? (17...Rc8 18.Qd3=) 18.Rc1 (better is 18.Ne6 Qd6 19.Nf8+–) 18...Nc5= 19.Nc6 (19.N4f3!?=) 19...Bc6+= 20.bc6 Qc6 21.Nb3 Nb3 22.Qb3 Rc8 23.Bb2 Qb7 24.h3 Ne4 25.Bg7 Kg7 26.Qb2 Kg8 27.Be2 Rc1 28.Qc1 Qd5 29.Bf3 Kg7 (better is 29...Qc5!? 30.Qc5 Nc5–/+) 30.Qb2= f6 31.Qb6 Qe5?? (31...f5 32.Qc7 Kh6 33.Qf7=) 32.Qb1 (better is 32.Qb7 Kh6 33.Qe4 Qe4 34.Be4+–) 32...Nd2= 33.Qb7 Kh6 34.Be2 –/+. TIROLOCO – Putte6, Live Game Caissa's Web, 2004.

5.Nf3 Bd6+= 6.c4 d4 (6...0–0 7.e3–/+) 7.d3 (7.e3 de3 8.de3 0–0=) 7...0–0–/+ 8.g3 b6 (8...Qa5 9.Qd2 Qd2 10.Nbd2 e5+=) 9.Nd4 Bb7?? (9...cd4 10.Bg2) 10.Nf3+= Nbd7 (10...Bf3!? 11.ef3 a6=) 11.Bg2+= Qc7 (11...Ne5 12.Be5 Be5 13.Ra3=) 12.0–0 e5 (12...Ne5 13.Nbd2+=) 13.Nc3+/– Rfe8 14.e4 (14.a5 ba5 15.Qa4 e4 16.de4 Ne4 17.Ne4 Re4+/–) 14...Rad8+= 15.Nd5 Nd5 16.ed5 Nf6 17.Re1 Bc8 18.a5 Bg4 (18...ba5 19.Qa4+/–) 19.a6 (19.h3 Bf3 20.Qf3 ba5+–) 19...h6 20.h3 Bh5 21.Re3 Nh7 (21...Nd7 22.Qc2+/–) 22.Qc2 Re7 (22...Nf6 23.Rae1 Nd7 24.Re4+/–) 23.Nh4 (23.Rae1 Bf3 24.Bf3 Nf6+/–) 23...Qd7 (23...Ree8!?+/–) 24.g4+– Bg6 (24...g5 25.Nf5 (25.gh5?! gh4 26.Rae1 f6+–) 25...Bg6 26.Ne7 Qe7 27.Rae1+–) 25.Ng6 fg6 26.Rae1 Rde8 (26...Nf6 27.g5 hg5 28.Be5 Be5 29.Re5 Re5 30.Re5+–) 27.Be4 Nf6 28.Bg6 Ng4 (28...Rf8 29.Bf5 Qd8+–) 29.hg4 (29.hg4 Qg4 30.Rg3+–) 1–0. Woschkat,Karl_Heinz – Hornyak,Istvan, CiF, 1991.

5.Nf3 Bd6 6.d3 Nbd7 7.c4 0–0 8.e3 b6 9.Nbd2 Bb7 10.g3 e5 (10...a6+=) 11.Qc2 (11.cd5 Bd5 12.Bg2 a6=) 11...Re8 (11...e4!? 12.de4 de4–/+) 12.Bg2 d4 13.0–0 de3 14.fe3 Nf8 (14...Ng4 15.Rae1 f5 16.Qd1=) 15.e4 (15.a5 a6+=) 15...Bc7 16.Rad1 (16.a5 ba5 17.Nb3 a6=) 16...Qe7 (16...a6 17.a5=) 17.Nb3 (17.Nb1 a6=) 17...Ng6 18.Rf2 (18.a5 h5=) 18...Rad8 19.Rfd2 Rd7 (19...h5 20.a5+=) 20.h3 (20.Bh3!?=) 20...Red8 21.Ne1?? (21.a5 Nh5 (21...ba5?! 22.Bc3=) 22.a6 Ba8–/+) 21...Qe6?? (better is 21...Nh5–+) 22.Nf3 h6 23.Kf2 Kh7 24.Qc1 (24.a5!?–/+) 24...Be4 25.de4 Ne4 26.Ke1 (26.Ke1 Nd2 27.Nbd2–+). Baer,Cy (1895) – Nacke,Lars (1930), RSS4D starter–3, 2008.

5.Nf3 Bd6+= 6.Be5 0–0 +=.

5.Nf3 Nbd7 =.

5.Nf3 Be7 6.a5 (6.e3 Nbd7=) 6...0–0 (6...Nbd7 7.e3+=) 7.Ne5 (7.e3 a6+=) 7...Nbd7 8.e3 Ne5 9.Be5 Bd7 (9...Ne4 10.Nc3 f6 11.Bg3 Nc3 12.dc3+=) 10.a6 ba6 11.Ra6 Qe8 12.Nc3 d4 (better is 12...c4!?=) 13.ed4+/– cd4 14.Bd4 Nd5 15.Nd5 (15.Qb1!?+=) 15...ed5= 16.Qe2 (16.Ba7? Bc5 17.Be2 Ra7 (17...Ba7?! 18.b6=) 18.Ra7 Ba7–+) 16...Bb5?? (better is 16...Bf6 17.Rf6 gf6=) 17.Qb5+– Bc5 (17...Bf6 18.Be3 d4 19.Rf6 gf6 20.Qh5+–) 18.Be3 Be3 19.fe3 Qb5 20.Bb5 Rfb8 (20...Rab8 21.Ra5 Rfc8+–) 21.Bc6 Rb1 22.Ke2 Rh1 23.Ba8 Rh2 (23...d4 24.ed4 Kf8 25.Ra7 Rh2 26.Bd5+–) 24.Bd5 g6 (24...Kf8 25.Ra7 f5 26.c4+–) 25.Ra7 (25.Ra7 Kf8 26.c4+–) 1–0. Trkn – guest316, ICC, 2004.

5.e3 b6

6.d4 c4 7.g3 Nbd7 8.Bg2 Bb7 9.Nf3 Rc8 10.c3 Bd6 11.0–0 0–0 12.Ba3 Ba3 13.Na3 Ne4 14.Qc2 Qf6 15.Nd2 Ng5 16.e4 Qg6 17.e5 Qh6 18.h4 Ne4 19.Ne4 de4 20.Be4 Be4 21.Qe4 Rfe8 22.Qe3 Qg6 23.Qe2 f6 24.ef6 Nf6 25.Nc4 Ne4 26.Ne5 Qf5 27.c4 Rcd8 28.Nc6 Rd6 29.Rae1 Nc3 30.Qe5 Qe5 31.Re5 Na4 32.Ra1 Nb2 33.Ra7 Nc4 34.Re1 Nd2 35.Kg2 Rd5 36.Ne7 Re7 37.Re7 Rd4 38.R1e6 g6 39.Rb7 Nc4 40.Re8 1–0. NN – NN, 2014.

6.Be2 Nbd7 7.Nf3 Bd6 8.0–0 Qc7 (8...0–0 9.Nc3+=) 9.h3 (9.a5 0–0=) 9...Bb7 10.d3 (10.Re1 0–0+=) 10...e5 (10...0–0 11.Na3+=) 11.Nbd2 (11.a5 ba5 12.Bc3 0–0+=) 11...0–0+= 12.c4 e4 13.de4 de4 (worse is 13...Ne4 14.cd5 Bd5 15.Nc4=) 14.Ne1 (14.Nh4 a6+=) 14...Rad8 (14...a6 15.f3+=) 15.Qc2 Be5 (15...Rfe8 16.a5+=) 16.Nb3 White plans a5 16...Bb2 17.Qb2 Ne5 18.Qc2 Rd7 19.Qc3 White intends a5 19...Rfd8 20.a5 Nd3 21.a6 Ba8 22.Rd1 Ne5 (22...Nf4 23.ef4 Rd1 24.Bd1 Rd1 25.Qe5 Qe5 26.fe5+=) 23.Rd7= Rd7 24.Nc2 Ng6 25.Rd1 Qd8 26.Rd7 Qd7 27.Qd2 Qc7 28.Ne1 Nh4 (28...Ne5 29.Qc3=) 29.Qd1 (29.g3 Nf5=) 29...Nd7 (29...Ng6 30.Nc2=) 30.Nd2 f5 (30...Nf5 31.Qc2 Nf6 32.Qc3=) 31.Nf1 Ne5 32.Nh2 Nf7 33.f3 (33.Nc2 Qe7=) 33...ef3 (33...Nd6 34.f4=) 34.Nhf3 Ng6 (34...Qe7 35.Nh4 Qh4 36.Kf1+=) 35.Qd3 (35.Bd3 Nd6=) 35...Be4 36.Qd1 h6 (36...Qe7 37.Nd2=) ½–½. Ruhle,Ernst Albrecht – Dittler,Volkfried, Wangs Pizol op, 1996.

6.Qf3 Nbd7+= 7.Nh3 Bd6 8.d3 Bb7 9.Nd2 Qc7 10.g3 c4! 11.dc4? (better is 11.Bf6 Nf6 12.Bg2–+) 11...Ne5 12.Qe2 (12.Be5 Be5 13.Rd1 dc4 14.e4–+) 12...dc4 13.Rg1 (13.Nc4 Bh1 14.0–0–0 Nc4 15.Qc4–+) 13...c3 14.Ba3 (14.0–0–0 Bb4 15.Kb1 cb2 16.Ng5–+) 14...cd2 15.Qd2 Nf3 (15...Nf3 16.Kd1 Nd2 17.Bd6 Qd6–+) 0–1. preethan (2135) – pierred (2850), net–chess.com, 2015.

6.Nf3 Nbd7 7.c4 Bb7 8.Nc3 d4 9.ed4 Bf3 (9...cd4!? 10.Nd4 Ne5+=) 10.Qf3+= (worse is 10.gf3 cd4 11.Ne2 e5=) 10...cd4 11.Ne4 e5 12.g3 (12.a5!? Rc8 13.ab6 ab6 14.Bd3+/–) 12...Rc8 13.Rc1 (13.Bd3 Bb4=) 13...Bc5 (13...Nc5 14.Nc5 Bc5 15.Bh3=) 14.Bg2 0–0 15.0–0 Re8 16.d3 (16.Rfe1 Bb4 17.Qe2 Ne4 18.Be4 Nc5=) 16...Ne4 17.Qe4 Nf6 18.Qe2 Qd6 19.Rfe1 Bb4 20.Red1 Re7 21.Ra1 Bc5 (21...g6!?=) 22.a5+= g6 23.ab6 ab6 24.Bc1 (24.Bc6 Qe6+=) 24...Kg7 25.Bg5 h6 26.Bf6 Qf6 27.Ra6 Rcc7 28.Rda1 Qd6 29.Bd5 f5 (29...Re8 30.h4+=) 30.f3 (30.Ra8 e4 31.de4 fe4 32.Rg8 (32.Be4?! d3 33.Qd3 Qd4 34.Qd4 Bd4+=) 32...Kh7 33.Raa8+–) 30...g5? (better is 30...Rc8+=) 31.Ra8+– g4?? (better is 31...Qf6+–) 32.fg4 e4 (32...Kh7+–) 33.Rg8 Kh7 34.Raa8 Re6 35.Rh8 Kg6 (35...Kg7 36.gf5 Ra7 37.Qg4 Rg6 38.Rag8 Kf6 39.Rg6 Ke7 40.Rg7 Kf6 41.Rh6 Ke5 42.Qe4#) 36.gf5 Kf5 (36...Kg5 37.Rag8 Rg6 38.h4 Kf6 39.Rg6 Ke7 40.Qe4 Qe5 41.Qe5 Kd7 42.Qe8#) 37.Qh5 1–0. Nikolic,Jovane (1695) – Saito,Helio Tsutomu (1800), Sao Bernardo do Campo BRA, 4th Open, 2012.

6.Nf3 Nbd7 7.Be2 Bd6 8.0–0 Qc7 (8...0–0 9.d4 (9.c4 e5 10.d3 dc4 11.Nc3 Qc7 12.Ne4 cd3 13.Bd3+=) 9...a6 10.c4 (10.dc5 Nc5 11.Nc3 Qe7 12.ba6 Ba6 13.Nb5=) 10...Bb7 11.Na3 cd4 12.cd5 Bd5 13.Nc4=) 9.g3 (9.d4 0–0 (9...a6= 10.dc5 Nc5 11.Bf6 gf6 12.Na3 Ne4 13.ba6=) 10.c4 (10.dc5 bc5 11.Nc3 Ng4 12.Kh1 Bh2 13.Na2–/+) 10...Bb7 11.dc5 Nc5 12.Bf6 gf6 13.Qd4=; 9.a5 a6 (9...0–0 10.ab6 Qb6 11.Nc3 e5 12.Nh4 Re8 13.Nf5=) 10.ab6 Qb6 11.c4 0–0 12.Nc3 Bb7 13.Qc2=) 9...0–0+= (9...e5 10.Nh4 a6 11.Nf5 0–0 12.f4 Re8 13.Na3=) 10.Ng5 (10.c4 Bb7 11.cd5 Nd5 12.Nc3 e5 13.Qc2+=) 10...e5 (10...h6 11.Nh3 e5 12.f4 e4 13.Nf2+=) 11.f4 h6 (11...e4 12.Nc3 h6 13.Nh3+=) 12.Nh3 (12.Nf3 Re8 13.fe5+=) 12...d4 (12...e4 13.Nf2+=) 13.Na3 de3 14.de3 ef4 15.ef4 Be7 16.c4 Rd8 17.Qc2 Bb7 18.Nf2 Ne8 19.Ng4 Nef6 20.Qc3 Nf8 21.Nc2 Ne6 22.Nce3 (22.Rad1 Ng4 23.Bg4 Nd4 24.Nd4 cd4=) 22...Ne4 (22...Nd4 23.Qe1–/+) 23.Qe1+= Nd4 (23...Nd2 24.Be5 Bd6 25.Rf2+=) 24.Rd1 Rd6 25.Nd5 (better is 25.Bd4 Rd4 26.Nf5 Rd1 27.Bd1=) 25...Rd5–/+ 26.cd5 Nc2 27.Bf3 Ne1 28.Be4 Bd6 (28...c4!? 29.Rfe1 c3–/+) 29.Rfe1–/+ a6 30.Ne5 ab5 31.ab5 f6 (better is 31...Be5!? 32.Be5 Qd7–/+) 32.Nc4+= Bc8 33.Ra1 (33.Be5 fe5 (worse is 33...Be5 34.fe5 Qd8 35.d6+–) 34.fe5 Bg4=) 33...Ra1+= 34.Ra1 Bd7 35.Ra8 Kf7 36.Ne3? (better is 36.Bd3 Be7 37.Ra6 Bb5 38.d6 Bd6 39.Nd6 Qd6 40.Bb5–/+) 36...Bb5 37.Nf5 c4?? (better is 37...Bd7–+) 38.Nd6+– Qd6 39.Ba3 (39.Ba3 Bc6 40.Bd6 Ba8 41.Bc7+–) 1–0. Norbeck,Ivar – Bengtsson,Torsten, corr SSKK 2–61, 1985.

6.f4!? =.

5.e3 Bd6

6.Nf3 Nbd7 7.Be2 e5 8.0–0 e4 9.Ng5 (9.Nh4 Ne5+=) 9...Be5 (9...Nf8 10.f3 h6 11.Nh3 Bh3 12.gh3+=) 10.Be5= Ne5 11.d4 Ng6 12.dc5 h6 13.Nf7 Kf7 14.f3 Qe7 15.Nc3 Qc5 16.Qd4? (16.Nd5 Bf5 17.fe4 Be4 18.Bf3 Bc2 19.Qe2 Nd5 20.Bd5 Ke7 21.Bb7=) 16...Qd4–+ 17.ed4 e3 18.Rfe1 Re8 19.Ra3 Bf5 (19...Nh4 20.Nd1–+) 20.g4 Bd7 21.Bd3? (better is 21.Nd1–+) 21...Nh4 22.Be2 Rac8 23.Nd1 (23.Kf1 Re7–+) 23...Rc2 24.Re3 Re3 25.Ne3 Ra2 26.Bd1 Rd2 27.h3 a6 28.Re2 (28.ba6 ba6 29.a5 Rd4–+) 28...Rd4 29.Kf2 ab5 30.ab5 Bb5 31.Rb2 Bc6 32.Kg3 g5 33.Bb3 Rd3 34.Kf2 Kf8 35.Bc2 (35.Ke2 Bb5 36.Kf2 d4–+) 35...Rd2 36.Kf1 Nf3 37.Nf5 Nd7 38.Nh6 (38.Rb3 Nh2 39.Ke1 Rc2 40.Ra3–+) 38...Nde5 39.Ra2 Bb5 0–1. Pieleck,Rudi – Baumann,Heinz, RSX9E – A00 – Sokolsky–1, 2002.

6.Nf3 0–0

7.d3 Nbd7 8.Nbd2 a6 9.c4 ab5 10.ab5 Ra1 11.Qa1 Qc7 12.h3 b6 13.Be2 Bb7 14.Bc3 e5 15.0–0 d4 16.ed4 (16.Bb2 Ra8 17.Qb1 Be7+=) 16...ed4 17.Bb2 Ra8 18.Qb1 Nf8 19.Bc1 Ng6 20.Ng5 Nf4 21.Bf3 h6 22.Nge4 Be4 (22...Ne4 23.Ne4 Ng6 24.g3–/+) 23.Be4? (better is 23.Ne4!? Ne4 24.Bf4=) 23...Ne2–/+ 24.Kh1 Nc3 25.Qc2 Re8 (25...Ra2 26.Qb3 A) 26...Nfe4?! 27.Ne4 Qe7 A1) 28.Nc3? Rf2 29.Kg1 Rf1 30.Kf1 Qf6 (30...dc3?! 31.Qc3 Bg3 32.Qd2+=) 31.Ke2 dc3–+; A2) 28.Nd6 Qd6 29.Bb2=; B) 26...Ra1–/+) 26.Nb1?? (better is 26.Bc6 Re6 27.Bb2=) 26...Nfe4–+ (26...Re4?! 27.de4 Nce4 28.Nd2=) 27.de4 Ne4 28.Qd3 (28.Nd2 Qe7–+) 28...Re6 (better is 28...Qe7!? 29.Kg1 Qe5 30.f4–+) 29.Nd2 Nd2 (29...f5 30.Kg1–+) 30.Bd2 Bf4 31.Bf4 Qf4 32.Kg1 Qe4 33.Rd1?? (better is 33.Qe4 Re4 34.f3–+) 33...Qd3 34.Rd3 Re1 35.Kh2 Rc1 36.Kg3 (36.Rd2–+) 36...Rc3 0–1. Zalewski,Andrzej – Kotarski,Bartosz, IV Turniej Weekendowy Lomza Poland, 2013.

7.c4 Re8

8.Bf6 Qf6 9.Nc3 A) 9...Qf5 10.d4 dc4 11.Bc4 cd4 12.Qd4 Bc5 (12...Rd8= 13.Rd1=) 13.Qd3=; B) 9...dc4 10.Ne4 Qe7 11.Bc4 (11.Nd6 Qd6 12.Bc4 Nd7 13.a5= Bc7 B1) 12.0–0 Nd7= 13.Rc1= (13.Qc2=); B2) 12.Rc1 Nd7 13.Qc2=; C) 9...d4 10.Ne4 Qe7 11.Bd3 Bc7 12.0–0 e5= 13.ed4= (13.Ng3=).

8.cd5 ed5

9.Be2 Qe7 10.0–0 A) 10...Bg4 A1) 11.a5 a6 12.Qa4 Nbd7 13.Nc3 c4 14.Qc2 Nc5+=; A2) 11.Qc2 Nbd7 12.Rc1 a6 13.Na3 a5 14.h3 Bf3+=; A3) 11.Re1 Nbd7 (11...Qe6 12.a5 Nbd7 13.Nc3 Rac8 14.d3 Re7=; 11...a6 12.Nc3 b6 13.Qc2 c4 14.d3 Bf5=; 11...a5 12.Nc3 Nbd7 13.Rc1 Rad8 14.h3 Bf5=) 12.Nc3 a6 13.d3 Bc7 14.h3 Bf5+=; A4) 11.d4 c4 12.Ba3 Ba3 13.Na3 Ne4 14.Qc2 Bf5+=; A5) 11.h3 Bf5 12.Nc3 Nbd7 13.a5 Rac8 14.d3 Qe6=; B) 10...a6 11.Nc3 Bg4 12.h3 Bf5 13.a5 ab5 14.Nb5 Nc6=; C) 10...Bf5 C1) 11.a5 Nbd7 (11...a6 12.Nc3 Nbd7 13.d3 Bg4 14.Re1 d4=) 12.Nc3 Rac8 13.a6 b6 14.Rc1 Ne5+=; C2) 11.Nc3 Nbd7 12.a5 (12.d3 a5 13.Rc1 Bg4 14.Re1 Rad8+=) 12...Rac8+= 13.a6 b6 14.Rc1 Ne5+=.

9.Be2 Bf5 10.0–0 A) 10...Nbd7 A1) 11.a5 b6 (11...Qe7 12.Nc3 Rad8 13.d4 c4 14.Nh4 Be6+=; 11...a6 12.Nc3 ab5 13.Nb5 Be7 14.Qa4 c4+=) 12.Nh4 Be6 13.f4 d4 14.f5 Bd5+=; A2) 11.d3 Qe7 (11...Qa5 12.Bc3 Qb6 13.Qd2 Qc7 14.Rc1 a6=; 11...a6 12.Nc3 Ne5 13.a5 Qb8 14.Kh1 Be6=) 12.Nc3 Rad8 13.Rc1 Rc8 14.a5 Bc7+=; B) 10...a6 11.Nc3 B1) 11...Qa5 12.d3 (12.Qb3 c4 13.Qd1 Nbd7 14.Nd4 Be6=) 12...Nbd7+= 13.Qb3 Be6 14.Ng5 d4=; B2) 11...Nbd7 12.d3 Ne5 13.a5 Qb8 14.h3 Be6=; B3) 11...Bc7 12.d3 Qd6 13.a5 d4 14.Ne4 Ne4=; B4) 11...b6 12.ba6 Na6 13.Nb5 Nb4 14.d3 Bb8=; C) 10...Qe7 C1) 11.Nc3 a5 (11...Nbd7 12.a5 Rac8 13.a6 b6 14.Rc1 Ne5+=) 12.d3 Nbd7 13.Rc1 Ne5 14.Re1 Rad8+=; C2) 11.a5 a6 (11...Nbd7 12.Nc3 Rac8 13.a6 b6 14.Rc1 Ne5+=) 12.Nc3 Qe6 13.d3 Bg4 14.ba6 ba6+=.

9.Be2 Bf5 10.a5 A) 10...a6 11.b6 (11.0–0 ab5 12.Bb5 Re6 13.Ng5 Re7 14.Qa4 Ne4+=) 11...Nc6 (11...Qe7 12.0–0 Nc6 13.Re1 Rac8 14.d3 d4+=) 12.0–0 Qe7 13.Re1 Rac8 14.d3 d4+=; B) 10...d4 11.Bc4 Nbd7 12.0–0 Ne5 13.Ne5 Be5 14.f4 Bc7=; C) 10...Bc7 11.Bf6 Qf6 12.d4 c4 13.0–0 Nd7 14.Nc3 Qd6+=.

9.Be2 Bg4 10.0–0 Nbd7 11.Nc3 Qc7 12.h3 A) 12...Bf5= 13.d3 (13.a5 Rad8 14.a6 Nb6 15.Na4 Nfd7 16.d3=; 13.Re1 Qa5 14.d3 Rac8 15.Qd2 Ne5 16.Rad1+=) 13...Ne5 14.d4 Nf3 15.Bf3 Rad8 16.dc5=; B) 12...Bf3 13.Bf3 d4 14.Nd5 Nd5 15.Bd5 Nb6 16.Bb3=.

9.Be2 Bg4 10.0–0 Nbd7 11.Nc3 Qe7 12.Re1 A) 12...Rac8 13.a5 (13.d3 d4 14.ed4 cd4 15.Ne4 Ne4 16.de4+=) 13...Qe6 14.a6 b6 15.d3 Qf5 16.h3=; B) 12...a6 13.d3 (13.a5 d4 14.ed4 cd4 15.Na2 ab5 16.Nd4–/+) 13...Bc7 14.h3 Bf5 15.Qc2 ab5 16.ab5=; C) 12...Qe6 13.a5 (13.d3 Bf3 14.Bf3 Ne5 15.Be2 Neg4 16.g3+=) 13...Rac8 14.d3 Re7 15.a6 b6 16.Rc1=; D) 12...a5 13.Rc1 (13.d3 Rad8 14.Rc1 Nb6 15.Nd2 Qe6 16.Bg4+=; 13.Rb1 Nb6 14.d3 Rad8 15.h3 Bf5 16.Rc1+=) 13...Rad8 14.h3 Bf3 15.Bf3 Qe5 16.Kf1=; E) 12...Nb6 13.d3 (13.d4 cd4 14.Qd4 Bf3 15.Bf3 Be5 16.Qd3+=) 13...a5 14.ba6 ba6 15.Rb1 Rab8 16.Qc2+=; F) 12...Bf5 13.a5 (13.d3 Ne5 14.Rc1 Nf3 15.Bf3 Rad8 16.Qd2+=) 13...Rad8 14.a6 b6 15.d4 c4 16.Qc1=; G) 12...Rad8 13.d3 c4 14.dc4 dc4 15.Bc4 Ne5 16.Ne5+=.

9.Be2 Bg4 10.0–0 Nbd7 11.Nc3 Qe7 12.h3 A) 12...Bf5 13.a5 (13.d3 Rac8 14.a5 Be6 15.Ng5 Rc7 16.Ne6=; 13.Re1 Rac8 14.a5 Ne5 15.d4 Nf3 16.Bf3=; 13.Rc1 a6 14.ba6 ba6 15.Ba3 d4 16.ed4–/+) 13...Rac8 14.d3 Be6 15.Ng5 Rc7 16.Ne6=; B) 12...Bf3 13.Bf3 Qe5 14.g3 Qe6 15.Bg2 c4 16.Ne2=; C) 12...Be6 13.a5 Rac8 14.Qc2 Ne5 15.Ne5 Be5 16.f4=.

9.Be2 Bg4 10.0–0 Nbd7 11.d3 b6 (11...Qe7 12.h3 Bh5+=) 12.Nbd2 (12.Nc3 a6=) 12...Qe7 (12...a6+=) 13.h3 Bh5 14.Nb3 (14.Qb3 d4 15.ed4 Bf4+=) 14...Rac8 (14...d4 15.e4–/+) 15.Rc1 Bf3 16.Bf3 Ne5 17.Be5 Be5 18.Nd2 d4 (18...a6 19.Qb3 ab5 20.Qb5+=) 19.Bc6 Red8 20.e4 Bf4 21.Rc2 Bd2 22.Qd2 Nd7 23.Qf4 (23.a5 Ne5 24.Bd5 Re8+=) 23...Nb8 (better is 23...Ne5 24.Rd1 Nc6 25.bc6 Rc6–/+) 24.Bd5= Nd7 25.Bc4 Ne5 26.Qf5 Nc4 27.Rc4 Rf8 28.e5 Rce8 29.Re1 f6 30.e6 Rd8 31.Re4 (better is 31.Rc2!?=) 31...Rd6 32.f4?? (32.Re2!? Re8 33.a5–/+) 32...Re8 (better is 32...g6 33.Qg4 f5–+) 33.Qh5 Re6 34.f5? (better is 34.Re6 Qe6 35.Kh2–+) 34...Re4 35.de4 Qe4 36.Rc1 (36.a5 Qe3 37.Kh1–+) 36...Qe3 37.Kh2 Qf4 38.Kh1 (38.g3 Qd2 39.Kg1 Qc1 40.Qd1 Qd1 41.Kf2 Qd2 42.Kf3 Qe2 43.Kf4 Qe4) 38...Qc1 39.Kh2 (39.Qd1 Qd1 40.Kh2 Re2 41.Kg3 Qd3 42.Kh4 Rg2 43.a5 Qe4 44.Kh5 Rg5) 39...Qf4 40.g3 0–1. GULP – Bsh4Brns, Live Game Caissa's Web, 2004.

5.e3 Bd7

6.c4 a6 7.d3 Be7 8.Nf3 ab5 9.ab5 Opening the a–file gets White a lot of play 9...Ra1 10.Ba1 Qa5 (10...dc4 11.dc4 0–0 12.Bd3+=) 11.Bc3= Qa7 (11...Qb6 12.Ne5=) 12.Be2 0–0 (12...dc4 13.dc4 0–0 14.0–0+=) 13.0–0 Rc8 (13...dc4 14.dc4 Rd8 15.Bd3+=) 14.Nbd2 (14.Ne5 Rd8 15.Bh5 Be8=) 14...Be8 (14...dc4 15.dc4 Qa2 16.Qa1 Qa1 17.Ra1+/–) 15.Qa1 (15.Qb3 dc4 16.Nc4 Bd7+/–) 15...Qa1 (15...Qb6 16.Be5+=) 16.Ra1 Nbd7 (16...dc4 17.dc4 b6 18.Ra7+/–) 17.Ra7+/– b6 (17...Rb8 18.Ne5+/–) 18.Ne5 Bd6 19.Nd7 Nd7 20.f4 (20.Bf3 Ne5 21.Be2 Nd7+/–) 20...Bb8 (20...d4 21.ed4 cd4 22.Bd4 Bf4 23.Nb3+/–) 21.Ra6 (21.Ra8 g5+/–) 21...Rc7 (21...d4!? 22.ed4 Bf4+=) 22.Bf3+/– dc4 23.dc4 Ra7 (23...f6 24.Bc6+/–) 24.Ra7 (24.Bc6 f6+–) 24...Ba7 25.Bc6 (25.Ne4 Bb8+/–) 25...Kf8 (25...Bb8 26.Kf2+/–) 26.Ne4 (better is 26.Kf2+/–) 26...Ke7 (better is 26...Bb8!?+/–) 27.Bg7+– Bb8 28.g4 f5 29.gf5 (29.Nf2 fg4 30.Ng4 Bg6+–) 29...ef5 30.Ng3 Bg6 31.Bd7 (31.Kf2!?+–) 31...Kd7+/– 32.h4 (32.Nf1 Bf7 33.Nd2 Bd6+/–) 32...h5 (32...Bf7!?=) 33.Kf2 Bf7 34.Nf5 The passed pawn on f4 will become decisive later 34...Bc4 35.Ng3 Bb5 (35...Bd6 36.Nh5 Bb5 37.e4+/–) 36.Nh5 Ke6 (36...Ke7 37.Kf3+/–) 37.Ng3 (37.e4 Bd3 38.Ke3 c4+/–) 37...Kf7 (37...Bd3 38.Kf3+=) 38.Bb2 Bc6 (38...Bd3 39.Kf3+/–) 39.h5 Kg8 (39...b5 40.h6 Bd6 41.h7+–) 40.h6 (40.Nf5 Be4 41.Ng3 Bc6+/–) 40...Kh7 (40...b5 41.Nf5 Be4 42.Ng3=) 41.Bg7 (41.Nf5 Bd7 42.Ne7 Kh6=) 41...Bc7 (41...b5 42.Nf5+/–) 42.f5 (42.Ke2 b5+/–) 42...Bg3 43.Kg3 c4 44.Kf2 (44.Kf4 b5+–) 44...c3 (44...b5!?+=) 45.Bc3+/– Kh6 46.f6 Kg6 47.Kg3 Kf7 (47...b5 48.Kf4+/–) 48.Kf4 b5 49.Ke5 Bd7 (49...Bf3 50.e4+/–) 50.Kd6 (50.e4 Bg4+/–) 50...Be6 (50...Bf5 51.Bd4+/–) 51.e4 (51.Kc5 Bc4+/–) 51...Bc4 (51...b4 52.Bb4 Kf6 53.Bc3 Kf7 54.Bd4+/–) 52.e5+– Be6 53.Bb4 Bc4 54.Kc5 (54.Bc5 Be6+–) 54...Ke6 55.Bc3 Be2 56.Bd4 (56.Bb2 Bd3+–) ½–½. Ruhle,Ernst Albrecht – Poell,Guenter, Wch Seniors Bad Wildbad, 1993.

6.c4 dc4 7.Nf3 =.

6.c4 Bd6 7.Nf3 0–0 8.d4 cd4 9.Bd4 dc4 10.Bc4 Re8 11.0–0 e5 12.Bb2 Qc7 13.Nfd2 e4 (13...Bg4 14.Qb3=) 14.g3 (better is 14.Bf6 gf6 15.Qh5+/–) 14...Be5 15.Nc3 Bg4 16.Qb3 Bf3 (better is 16...Rd8 17.f4 ef3 18.Nf3 Bg3 19.Bf7 Qf7 20.Qf7 Kf7 21.hg3 Nbd7=) 17.Be2?? (better is 17.Nf3 ef3 18.Rfd1+/–) 17...Bc3–+ 18.Nf3 Bb2 19.Qb2 ef3 20.Bf3 Nbd7 21.Rac1 Nc5 22.Qd4 Rac8 23.Bb7 Qb7 24.Rc5 Rc5 25.Qc5 Qb6 26.Qc2 Qe6 0–1. Zellmer,Gustav – Soberski,Mario, Guben op, 2003.

6.c4 Bd6+= 7.f4 0–0 8.Nf3 a6 9.Be2 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Qa5 (12...Ne4 13.Nc3 Nc3 14.dc3=) 13.Nc3 Bc8 14.0–0 Nbd7 15.Qc2 Nb6 16.Be2 Nbd7 17.Ng5 h6 (17...Rd8 18.Nge4 Ne4 19.Ne4+=) 18.Nge4+= Be7 19.Bb2 Qc7 20.Ra1 b6 21.Bf3 Nh7 (21...Ne4 22.Be4 Nf6 23.Bc6+=) 22.g4 Rd8 23.Ne2 (23.d3 Nhf6+=) 23...Ndf6 24.N2g3 (24.Be5 Qd7 25.N2c3 Bb7 26.Nf6 Nf6+=) 24...Nd5 (24...Qd7 25.Qc4=) 25.Kh1 f5 (25...Qd7 26.Nh5 g6+=) 26.gf5 ef5 27.Nc3 (27.Be5 Qd7 28.Nd6 Bd6 29.Bd5 Kh8=) 27...Nb4= 28.Qd1 Nd3 29.Kg1 Be6 30.Ba3 Bf8 31.Qe2 Qe7 32.Bc6 Qd6 (32...g6 33.Qf3+=) 33.Nh5 (33.Nd5 Bd5 34.Qd3 g6+=) 33...Bf7 34.Nf6?? (better is 34.Ng3+=) 34...Nf6–+ (34...gf6?! 35.Qg2 Kh8 36.Qg3–+) 35.Na4 (35.Qf3 Be7–+) 35...Qc7 (better is 35...Nf4!? 36.Qf1 Ne6 37.Nb6–+) 36.Nb2 Qd6 (36...Bh5 37.Qg2–+) 37.Nd3?? (37.Na4 Nf4 38.Qf1–+) 37...Qd3–+ 38.Qd3 Rd3 39.Bc1 Rb3 (39...Ne4 40.Ra6 c4 41.Be4 fe4 42.Rb6–+) 40.Ra3 (40.h4 Bc4 41.Kg2 Bb5 42.Bb5 Rb5–+) 40...Rb1 41.Rc3 Nd5 42.Rc2 Nb4 43.Rc3 Na2 44.Ra3 Rc1 45.Kf2 Nb4 46.Ra8 Kh7 (better is 46...Nd3 47.Kf3–+) 47.Rb8 (47.Rf8 Kg6 48.e4–+) 47...Nd3 48.Kg2 Rc2 (better is 48...Be7 49.Rb6 Bf6–+) 49.Rb6 (49.Rf8 Rd2 50.Kf3–+) 49...Rd2 50.Kg3 c4 (50...Re2 51.Ra6–+) 51.Bd7 Re2 (51...g6 52.Be6 Kg8 53.h3–+) 52.Bf5 g6 53.Bg4 (53.Bd3 cd3 54.Rb7 Re3 55.Kf2–+) 53...Re3 54.Kh4 Nf4 55.Bd1 g5 0–1. Sundin,Tommy – Forsgren,KO, Skelleftea Sweden, 1988.

6.Be5 a6 =.

6.Nf3 a6 7.Nc3 =.

6.Nf3 Be7 7.c4 (7.Be2 0–0=) 7...0–0 8.Nc3 a6 9.Bd3 ab5 10.ab5 Ra1 11.Qa1 Bd6 12.Ng5 (12.0–0 Qc7=) 12...h6 (better is 12...Re8+=) 13.h4?? (better is 13.Nf3=) 13...dc4 (13...hg5 14.hg5 dc4 15.Bc2–+) 14.Bc4 (better is 14.Nge4 cd3 15.Nd6–/+) 14...Re8?? (better is 14...hg5!? 15.hg5 Ne8–+) 15.Qb1 (15.Nce4 Ne4 16.Ne4 Bf8=) 15...Be5 (15...hg5!? 16.hg5 Ng4–/+) 16.f4 Bc7 17.Nce4 Ne4 18.Qe4? (18.Ne4!? Qe7 19.b6=) 18...hg5–/+ 19.hg5 g6?? (19...e5 20.g6 Be6–/+) 20.Rh8 1–0. Harders,Walter – Droste,Eckart, Schleswig Holstein–ch, 1991.

4.b5 Bc5

5.e3 0–0 =+.

5.Nf3 c6 6.e3= cb5 (6...a6 7.Be2=) 7.Bb5 Bd7 8.0–0 0–0 9.c4 (9.Ne5 Bb5 10.ab5 a6=) 9...a6 (9...Bb5 10.cb5 Nbd7 11.d3=) 10.Bd7 Nbd7 (< 10...Qd7 11.Bf6 gf6 12.cd5 Qd5 13.Nc3+=) 11.cd5 (11.d4 Be7 12.cd5 Nd5=) 11...Nd5 12.d4 Be7 (12...Bd6 13.Ba3 N7f6 14.Qb3=) 13.Qb3 Bf6 (13...N7f6!?=) 14.Ba3+= (< 14.Qb7 Rb8 15.Qa6 Rb2–+) 14...Be7 (14...Re8 15.Qb7 Qc8 16.Qb2+=) 15.Qb7+/– Ba3 (15...Qc8 16.Qc8 Rfc8 17.e4 Ba3 18.Na3=) 16.Na3 Nc7 (16...N7b6 17.a5 Na4 18.e4+/–) 17.Rfc1 Ne8 (17...Nd5 18.Rab1+/–) 18.Rab1 (18.Nc4 Ndf6+–) 18...Nd6 19.Qc6 Nf6 20.Ne5 Rc8 (20...Nde4+–) 21.Qa6 Ra8 22.Qc6 Rc8 23.Qf3 Rc1 24.Rc1 Nde4 (24...Qa5 25.Qc6 Qd2 26.Qc2 Qc2 27.Nc2+–) 25.Nac4 Qc8 26.a5 Nd2 27.Qc6 Nfe4 28.Nd2 (28...Qc6 29.Rc6 (29.Nc6 Nd2 30.Ne7 Kh8+–) 29...Nd2 30.Rc7+–) 1–0. Wall,Bill – SlowCam, internet, 2003.

5.Nf3 Nbd7 6.e3 =.

4.b5 Bd6

5.e3 =+.

5.Nf3 =+.

4.b5 Be7

5.e3 0–0 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.a4).

5.e3 c6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Be7).

3.b5 a6

4.a4 c5 5.e3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 a6 6.a4).

4.a4 c6 5.e3 ab5 6.ab5 Ra1 7.Ba1 Bg4 8.Be2 Be2 9.Ne2 cb5 10.Bf6 gf6 11.0–0 b4 12.c3 e6 13.f4 Nc6 14.Qa4 Qa5 15.Qb3 Be7 16.Nd4 f5 17.Qb2 Nd4 18.cd4 Kd7 19.Rc1 Ra8 20.Qc2 1–0. AsceticKingK9 – Snoopy85, ChessWorld.net, 2011.

4.a4 Bf5 5.Nf3 (5.e3 e6 6.Nf3 Bd6 7.Be2 ab5 8.ab5 Ra1 9.Ba1=; 5.ba6 Na6 6.Nf3 Nb4 7.d3 e6 8.Nh4 Bg4 9.h3+=) 5...e6 6.e3 Bd6 7.Be2 Bg4 8.0–0 0–0 9.Nc3 =.

4.a4 Bg4 5.h3 (5.Nf3 e6 6.Ne5 Bh5 7.c4 dc4 8.Qc1 Nbd7 9.Nc4+=; 5.f3 Bf5 6.e3 e6 7.ba6 Na6 8.g4 Bg6 9.h4+=) 5...Bh5 6.Nf3 e6 7.e3 Bd6 8.Be2 0–0 9.0–0 +=.

4.a4 g5 5.Nf3 (5.e3 Bg7 6.Nf3 g4 7.Ne5 Qd6 8.Nd3 Bf5 9.Be5=) 5...g4 6.Ne5 Bh6 (6...Bg7 7.e3 Qd6 8.ba6 Na6 9.d4=) 7.e3 ab5 (7...Bg7 8.Be2 Nfd7 9.Nd7=) 8.ab5 Ra1 9.Ba1 c6 10.Nc3 cb5 11.Bb5 Kf8 12.Bd3 Na6 13.Be2 Rg8 14.0–0 Rg5 15.Nb5 Re5 16.Be5 Nd7 17.Bd4 Qa5 18.Na7 Qc7 19.Bg4 Qb8 20.Qa1 Qa7 21.Ba7 1–0. pierre – opponent, internet, 2008.

4.ba6 A) 4...ba6 5.Bf6 (5.e3 Nbd7 6.Nf3 Rb8 7.Bf6 Nf6 8.c4 e6 9.Ne5+=; 5.Nf3 Nbd7 6.c4 e6 7.Nc3 Bd6 8.e3 Rb8 9.Rb1+=) 5...ef6 6.e3 Bd6 7.c4 dc4 8.Bc4 Nd7 9.d4=; B) 4...Na6 5.Nf3 (5.e3 Bg4 6.Be2 Be2 7.Qe2 c6 8.Bf6 ef6 9.d4+=) 5...e6 6.e3 Bd6 7.Be2 0–0 8.0–0 Nc5 9.Be5+=; C) 4...b6 5.Nf3 (5.e3 e6 6.a7 Ra7 7.Qf3 Na6 8.Bf6 Qf6 9.Qf6+=) 5...Ba6 6.d3 e6 7.e3 Bd6 8.Be2 0–0 9.0–0+=.

4.e3 Bg4 5.Be2 (5.f3 Bd7 6.ba6 Na6 7.Bf6 ef6 8.Ba6 Ra6 9.Ne2+=; 5.Nf3 e6 6.Nc3 Bd6 7.h3 Bh5 8.Be2 0–0 9.0–0+=) 5...Be2 6.Qe2 e6 7.Nf3 Nbd7 8.a4 Bd6 9.0–0 +=.

4.a4 ab5

5.ab5 Ra1

6.Ba1 c5 7.e3 Nbd7 8.f4 e6 9.Nf3 b6 10.Be2 Bb7 11.0–0 Be7 12.c4 0–0 13.Nc3 Ne4 (13...Qc7 14.Bb2+=) 14.Qc2 Nc3 15.Bc3 dc4 16.Bc4 Bf3 17.Rf3 Bf6 18.f5 (18.Rh3 h6 19.Be2=) 18...ef5 (18...Bc3 19.Qc3 (worse is 19.dc3 Ne5 20.Rf4 ef5–/+) 19...ef5 20.Rf5=) 19.Rf5 (better is 19.Qf5!? Qc7 20.Qe4+= (20.Bf6?! Nf6 21.g4 Ne8=)) 19...Qe7 20.Bd5 Bc3 21.Qc3 (worse is 21.dc3 Qe3 22.Qf2 Qc3 23.Bf7 Kh8–/+) 21...Nf6 22.Bc6 Rd8 23.Kf1 (better is 23.Rf4!?=) 23...Qd6 24.d4 (24.Ke2 Qh2 25.Qe5 Qe5 26.Re5 Kf8+=) 24...cd4 (better is 24...Qh2!? 25.dc5 Qh1 26.Kf2 Qh4 27.Ke2 Qg4 28.Rf3 Qg2 29.Rf2 Qg4 30.Rf3 Qa4–+) 25.Qd4+= Qc7 (25...Qd4 26.ed4 Rd4 27.Rf3+=) 26.Qf4 Qe7 27.h3 h6 28.Kg1 Qd6 (28...g6!? 29.Qg3 Rd3+=) 29.Qd6= Rd6 ½–½. Matveenko,Yury (2140) – Ajrapetian,Nikita (2090), Voronezh Region Senior Championship, 2009.

6.Ba1 c6 7.c4 (7.e3 Bg4 8.f3 Bf5=) 7...Qa5 (7...dc4 8.Qa4–/+) 8.Nc3? (8.Bf6 ef6 9.e3 dc4 10.Bc4 Bd6=) 8...e6 (better is 8...dc4!? 9.Qb1 cb5 10.Nb5 Bd7–/+) 9.e3=+ Bb4 10.Nf3 Ne4 11.Qc1 0–0 12.Qb2 Bc3 13.dc3 Nd7 (13...Rd8 14.cd5 cd5 15.Bd3=) 14.Bd3 (14.cd5!? cd5 15.Be2=) 14...Ndc5=+ 15.Bc2 dc4 16.0–0 (16.bc6!? Nd3 17.Bd3 cd3 18.cb7 Bb7 19.0–0–/+) 16...cb5–+ 17.Qb4 Qb4 (17...b6!?–+) 18.cb4–/+ Nd3 19.Bd3 cd3 20.Rd1 d2 (20...Rd8!? 21.Ne5 f6 22.Nd3 e5=+) 21.Nd2=+ Rd8 22.Bd4 Nd2 23.Rd2 e5 24.Bc3 Rd2 ½–½. De Visser,Arno – Rijnbergen, 1987.

6.Ba1 Qd6 7.e3 Bd7 8.Nf3 g6 (8...Bg4 9.h3 Bf3 10.Qf3=) 9.c4 (9.Be5 Qc5+=) 9...dc4 10.Bc4 Qb4 (10...Bg7 11.Qb3 0–0 12.Be5+=) 11.Qc2 (better is 11.Ne5!? Be6 12.Be6 fe6 13.Nc3+/–) 11...Bb5= 12.Bb5 (12.Ba2 Nbd7=) 12...Qb5 13.Nd4 (13.Bf6 ef6 14.Nc3 Qc4=) 13...Qd7+= 14.0–0 Bg7 15.Rc1 c6 (15...Na6 16.Nf3+=) 16.Nf3 0–0 17.d4 (17.Bf6 Bf6 18.d4 Na6+=) 17...Nd5 (17...Na6 18.Ne5 Qe6 19.Nd2–/+) 18.Nbd2 (18.Ne5 Qd6+=) 18...Na6 19.Ne4 (19.Ne5 Qe6+=) 19...Nab4 (19...Ra8 20.Bc3–/+) 20.Qb3 (20.Qb1 Qf5–/+) 20...Qf5+= 21.Ned2 (21.Nc3!? Nd3 22.Nd5 cd5 23.Rc7+=) 21...Qd3–/+ 22.Bc3? (better is 22.Qa4–/+) 22...Nc3?? (better is 22...Na2! 23.Qa2 Nc3 24.Rc3 Qc3–+) 23.Rc3+– Qb5 24.Rc5 Qb6 25.Nc4 Qa7 (25...Ra8 26.Nfd2 (26.Nb6?? Ra1 27.Rc1 Rc1 28.Qd1 Rd1 29.Ne1 Re1) 26...Ra1 27.Nf1+–) 26.Qb4 Qa1 27.Qe1 (27.Ne1 Ra8+–) 27...Ra8 (27...Qe1 28.Ne1 Ra8 29.Kf1+–) 28.g3 (better is 28.Kf1+–) 28...Qa6?? (better is 28...Qe1 29.Ne1 h6+–) 29.Ra5 Qc4 30.Ra8 Bf8 31.Ne5 Qd5 32.Qa5 Qb3 33.Qa2 Qd1 34.Kg2 e6 35.Nd7 Qd3 36.Rf8 Kg7 37.Rf7! Kh6 38.Qe6 (38.Qe6 Qb5 39.Nf6 Qd5 40.Nd5 cd5 41.Qh3 Kg5 42.Qh4#) 1–0. Felkl,Karel – Postl,Alexandr, Jiraskuv mem–B, 2001.

6.Ba1 Qd6 7.e3 e5 8.Nf3 Nbd7 9.Bb2 =+.

6.Ba1 Qd6 7.e3 e5 8.Nf3 e4 9.Nd4 c5 10.Nb3 Be7 11.c4 0–0 12.h3 (12.d4 ed3 13.Bd3 Rd8+=) 12...Nbd7 13.cd5 Nd5 14.Qg4 (better is 14.d4!?+=) 14...N7f6–/+ 15.Qd1 Be6 16.Be2 Ra8 17.0–0 Bd8 18.Nc3 Nc3 19.Bc3 Bc7 20.Bf6 0–1. Kingeorge (1825) – RC MacMillan (2595), ChessWorld.net, 2003.

6.Ba1 Qd6 7.Nf3 Nbd7 8.Bf6 gf6 (8...Nf6 9.e3+=) 9.e3 Nb6 10.Nc3 Bg7 11.g3 Qc5 12.Nd4 f5 13.Nce2 Bd7 14.Qb1 (14.f4 e6+=) 14...0–0 (14...e5!? 15.Nf3 Qb5 16.Qb5 Bb5+=) 15.c3= Ra8 16.Nf4 (16.Nf5?? Bf5 17.d4 Qc4–+) 16...Nc4 17.Nf5 Na3 Pawn b5, live or die! 18.Qb3? (better is 18.Qd3 Bf5 19.Qf5=) 18...Bf5–+ 19.Bg2 e6 (19...Nb5 20.Qd5 Nc3 21.dc3 (21.Qc5?? Ra1) 21...Qc3 22.Ke2 Qc2 23.Qd2 Qc4 24.Kf3–+) 20.d4 Qb5 21.Qb5 Nb5 22.0–0 (22.c4 Ra1 23.Kd2 Ra2 24.Ke1 dc4–+) 22...Nc3 23.Rc1 Ra3 24.h3 c6 25.g4 Bg6 26.Bf3 b5 0–1. Baer,Cy (1895) – Teske,Heike (2170), RSS7E easy–66, 2007.

4.a4 e6

5.Na3 Bd6 6.Nf3 0–0 7.e3 Re8 8.Be5 c5 9.Be2 +=.

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4).

5.Nf3 Bd6 6.e3 0–0 7.Be2 Re8 8.Ne5 ab5 9.ab5 =.

4.e3 ab5

5.Bb5 c6 6.Ba4?? Ra4–+ 7.Ne2 Nbd7 8.0–0 e5 9.d4 e4 10.Nbc3 (10.Nd2 Qb6 11.Qc1 Be7–+) 10...Ra8 11.Ng3 (11.a4 Nb6 12.Ba3 Ba3 13.Ra3 0–0–+) 11...Bd6 (11...Nb6 12.Qc1–+) 12.Nf5 Bf8 (12...Nb6!? 13.Nd6 Qd6 14.h3–+) 13.f3?? (13.Ng3 Nb6 14.Rb1–+) 13...Nb6–+ 14.fe4 de4 15.Ng3 Be7 16.Nce4 Ne4 (16...Ne4 17.Ne4 Nc4–+) 0–1. croach (2385) – yetzaline (2250), net–chess.com, 2015.

5.Bb5 c6 6.Bd3 Nbd7 7.Nf3 Qc7 8.c4 e5 9.Be2 e4 10.Nd4 dc4 11.Bc4 Ne5 12.Be2 Be7 13.Qc2 Qd6 (better is 13...Qd7!?+=) 14.Nc3= Nd3 15.Bd3 ed3 16.Qd3 0–0 17.Qc2 Rd8 18.0–0 c5 19.Nf5 Bf5 20.Qf5 Qd2 21.Rab1 Qd3 22.Qf3 b5 23.Rfd1 Qc2 ½–½. Tiedemann,Joern (2125) – Keber,Ernst (1710), RSS7E adv–18, 2005.

5.Bb5 Bd7 6.Bd7 Nbd7 7.d4 e6 8.Nf3 Bb4 9.Nbd2 0–0 10.a3 Bd6 11.c4 c6 12.c5 Bc7 13.0–0 Qb8 14.Rb1 Ng4 15.h3 Nh2 16.Nh2 Bh2 17.Kh1 Bc7 18.Kg1 e5 19.Qb3 Ra6 20.e4 de4 21.Ne4 ed4 22.Rfd1 Ra5 23.Bd4 Rb5 24.Qc3 Rb1 25.Rb1 g6 26.Nd6 Bd6 27.cd6 Qd6 28.Rb7 Ra8 29.Be3 Ra4 30.Qd2 Qd2 31.Bd2 Nc5 32.Rb8 Kg7 33.Bc3 Kh6 34.Bb4 Nd3 35.Bf8 Kg5 36.Rb3 Rd4 37.Rb6 Rc4 38.Kf1 Rc2 39.Be7 f6 40.f3 Nf4 41.g3 Nh3 42.Bd6 Kf5 43.a4 Ke6 44.Bc7 Kd7 45.Bb8 Rf2 46.Ke1 Rf3 47.Rb7 Kc8 48.Rh7 Kb8 49.Rh3 f5 50.a5 c5 51.Ke2 Ra3 52.Kf2 Ra5 53.Rh8 Kc7 54.Rg8 Ra6 55.Rg7 Kd8 56.Ke3 Rd6 57.Kf4 Re6 58.Kg5 c4 59.Rg8 Kc7 60.Rg7 Kb6 61.Rh7 Kc5 62.Kf4 c3 63.Rc7 Rc6 64.Rc6 Kc6 65.Ke3 Kc5 66.Kd3 Kb4 67.Kc2 g5 68.Kd3 Kb3 69.Kd4 c2 70.Ke5 f4! 71.gf4 gf4 72.Kf4 c1Q 73.Ke4 Qg5 74.Kd4 Qf5 75.Ke3 Kc3 76.Ke2 Qf4 0–1. Bestia02c – Ant416, computer chess game, 2000.

4.e3 Bd7

5.a4 e6 6.Nf3 Bd6 7.Be2 Qe7 8.Ne5 0–0 9.0–0=.

5.ba6 Na6 6.Be2 e6 7.Nf3 Bd6 8.Be5 Qe7 9.Nc3=.

5.Nc3 e5 6.d4 ed4 7.ed4 Qe7 8.Qe2 Qe2 9.Be2 Bb4 10.ba6 Ne4 11.ab7 Ra7 12.Bf3 Nc3 13.Ne2 Ne2 14.Ke2 Bb5 15.Kd1 Rb7 16.Bd5 c6 17.Bb3 0–0 18.a4 Ba6 19.Rb1 Re8 20.f4 Be2 21.Kc1 Na6 22.Rg1 Bd6 23.g3 Bb4 24.f5 Reb8 25.Rg2 Bf3 26.Rf2 Re8 27.Rf1 Rbe7 28.Ba1? Ba3 29.Bb2 Re1 30.Kd2 Bb4 31.c3 R8e2 32.Kd3 Be4 33.Kc4 Re3 0–1. Bestia02c – Bionic401, computer chess game, 2000.

5.Bf6 ef6 6.Nc3 ab5 7.Bb5 c6 8.Bd3 Ba3 9.Qh5+=.

4.e3 e6

5.a4 Bd6 6.Nf3 0–0 7.Be2 ab5 8.ab5 Ra1 9.Ba1 +=.

5.ba6 Na6 6.Nf3 Bd6 7.Be2 0–0 8.0–0 Nb4 9.Nc3 +=.

5.Nf3 Bd6 6.ba6 b6 7.Be2 0–0 8.a7 Nc6 9.0–0 +=.

5.Nf3 Bd6 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0 6.c4 a6).

3.b5 b6

4.e3 a5 5.a4 g6 6.Nc3 Bg7 7.Nf3 0–0 8.d4 Ne4 (8...c5 9.dc5 Ne4 10.Ra3 Nc5 11.Be2=) 9.Ne4+= de4 10.Ng5 (10.Nd2 Bb7+=) 10...Bb7 11.c4 h6 12.Nh3 c5 13.Nf4 (13.bc6 Nc6 14.Rb1 Nb4=) 13...Nd7 14.h4 (14.Be2 Qc7 15.Nh3 cd4 16.ed4 Nc5 17.dc5 Bb2 18.cb6 Qb6+=) 14...e5 (14...cd4 15.ed4 e5 16.Nd5+=) 15.de5= Ne5 16.Qc2 Qc7 17.Nd5 (17.Rd1!?=) 17...Bd5–/+ 18.cd5 Nd3 19.Bd3 Bb2 (better is 19...ed3!? 20.Qc1 Bb2 21.Qb2 Rad8–/+) 20.Qb2= ed3 21.Qd2 (better is 21.h5!?=) 21...c4 (21...Qe5 22.Ra3 Qd5 23.f3–/+) 22.0–0 (22.Rc1!? Rac8 23.e4–/+) 22...Qe5–+ 23.e4 Qe4 24.Qh6 Qd5 25.Qe3 Qe6 26.Qd2 Qf6 27.Rac1 Rac8 28.Rfe1 Qh4 29.Re3 Qg5 30.Qc3? Rfe8 31.Rh3 Qe5 32.Qd2? Qg7 33.g3?? Re2 34.Qd3 cd3 35.Rc8+= Qf8 36.Rf8?? Kf8–+ 37.Kf1 Ra2 38.Rh4?? Ke7 39.Rd4 d2 40.f3? Ke6 41.Ke2–/+ Ke5 42.Rd2?? Rd2–+ 43.Kd2 Kd4 44.g4 Kc4 45.g5 Kb4 46.Kd3 Ka4 47.Kc4 Ka3 48.Kc3 a4 49.Kc4 Kb2 50.Kd5 a3 51.Kc6 a2 52.Kb6 a1Q 53.Kb7 Kc3 54.b6 Kd4 55.Kb8 Ke3 56.b7–+ Kf3 57.Kc8 Qc3 58.Kb8 Kf4 59.Ka8 Qe5 60.b8Q Qb8 (60...Qb8 61.Kb8 Kg5–+) 0–1. Henkel,Scott – Griffin,John, Kalamazoo op01, 2000.

4.e3 a6!? =.

4.e3 Bd7 5.Nf3 c6 6.a4 a6 7.c4 ab5 8.cb5 cb5 9.ab5 Ra1 10.Ba1 e6 11.Be2 Bb4 12.0–0 0–0 13.Ne5 Be8 14.Nc3 Nbd7?? (Better is 14...Qc7 15.f4 Bd7=) 15.Nc6+– Qc8 16.Na2 Bd6+= 17.d4 Nb8 18.Qc1 Bc6 19.bc6 Nc6 20.Bb5 Bb8?? 21.Bc6+– Qc7 22.Nb4?? Qh2# 0–1. stoker – LORDVADER05, Live Game Caissa's Web, 2004.

4.e3 e5 5.Be5+= Bb4 6.c4 d4? (6...0–0!?+/–) 7.Bd4 (better is 7.Qf3!? c6 8.bc6 Qe7 9.Bd4 Qc7+–) 7...Nbd7 8.Qf3 Rb8 9.Qg3 Ne4? (better is 9...0–0+–) 10.Qg7 Rf8 11.Qh7 Qg5 (11...Ndf6 12.Qh6 Bd6+–) 12.Qe4 Kd8 13.Nf3 Qh5 14.Nc3 Bb7 15.Nd5 Re8 16.Qf4 (16.Nb4?! Be4 17.Be2 Qg6+–) 16...Rc8 (16...Bd5 17.cd5 Bc5 18.Bc5 bc5 19.Qg5 Qg5 20.Ng5+–) 17.g4 (better is 17.Nb4 c5 18.bc6 Bc6+–) 17...Qg6 18.Nb4 Re4 19.Qg5 Ke8 20.Rg1 c5 21.bc6! Bc6 22.Bd3 a5 23.Nc6 (23.Qg6 fg6 24.Nc6 Re6+–) 23...Rc6 24.Qd5 (24.Qg6!? Re3 (24...Rg6?? 25.Be4 Rd6 26.Bd5+–) 25.fe3 fg6+–) 24...Rce6 25.Nh4 Rg4 26.Bg6 Rg1 27.Ke2 Ra1 28.Qe6 Kd8 29.Qf7 Ra2 (29...Rg1 30.Bf5 Rg7 31.Qg7 Kc7 32.Qd7 Kb8 33.Be5 Ka8 34.Be4) 30.Bf5 a4 (30...Rd2 31.Kd2 Kc7 32.Qd7 Kb8 33.Be5 Ka8 34.Be4) 31.Qd7# 1–0. Taulien,Hans_Juergen (2350) – Uli,Ulrich (1870), remoteschach.de, 2003.

4.f3 a6 5.a4 Nbd7 6.d4 e6 7.c3 Bb7 8.g4 h6 9.h4 Be7 10.Qc1 e5 11.Bg2 e4 12.Nd2 Bd6 13.Rh3 ab5 14.ab5 Ra1 15.Qa1 c6 (15...e3 16.Nf1 Bf4 17.Rh1=) 16.bc6 Bc6 17.Ba3 Qe7 18.Bd6 Qd6 19.Qa6 0–0 20.Qa2 Ra8 21.Qb1 ef3 22.Bf3 Qf4 23.g5 hg5 24.hg5 Qg5 25.Kf2?? (better is 25.Nf1–/+) 25...Qd2–+ 26.Qd3 Qd3 27.ed3 Ra2 28.Ne2 Bb5 29.Ke3 g6 30.Rg3 Nf8 31.Rg5 N8h7 32.Re5 g5 33.c4 Bc6 34.cd5 Bb5 35.Re7 Kf8 36.Rb7 Ra3 37.Nc1 g4 (37...Nd7 38.d6–+) 38.Bh1 g3 39.Rb6 Ng4 40.Kd2? Ba4 41.d6 Nhf6 42.Ne2 Ra2 43.Ke1 Ra1 (43...Ra1 44.Kd2 Rd1 45.Kc3 Rh1 46.Rb8 Kg7 47.Ng3 Nd5 48.Kb2 Rh2 49.Ka3 Nc3–+) 0–1. SCRATCHY – icewater, Live Game Caissa's Web, 2004.

4.Nf3 Nbd7 5.e3 e5 6.Ne5 Ne5 7.Be5 Be7 8.c4 0–0 9.Nc3 Ne4 (9...Be6!?+/–) 10.Nd5 Bc5? (better is 10...Bd6 11.d4 Be5 12.de5 Be6+–) 11.Bc7 (11.Nc7?! Bb4 12.Be2 Bd2 13.Kf1 Qh4+/–) 11...Qg5 12.Bf4 Qf5 13.Qb1 g6 (13...Re8 14.f3 Nf6+–) 14.Qe4! Qe4 15.Nf6 Kh8 16.Ne4 Bf5 17.Nc5 bc5 18.d4 cd4 19.ed4 Rfe8 20.Kd2 Rac8 21.c5 Re4 22.Be3 Kg8 23.Bd3 Re7 24.Bf5 gf5 25.Rac1 Kg7 26.c6 Re6 27.Kd3 Rd6 (27...Kf6 28.d5 Re3 29.Ke3+–) 28.Bf4 Rd5 29.Kc4 Rdd8 30.d5 Re8 31.d6 Re4 32.Kb3 Rf4 33.d7 Rd8 34.Rhd1 Rf2 35.c7 (35.c7 Rd7 36.Rd7+–) 1–0. Trkn – guest1009, ICC, 2004.

3.b5 c5

4.e3 Qb6 5.c4 a6 6.a4 Nc6?? 7.Bf6+– ab5? 8.ab5 Ra1 9.Ba1 Nb4 10.Nc3 Bf5 11.Nd5 Qa5 12.Bc3 Qa3 13.d3 e6?? 14.Nb4 Qc3+= 15.Qd2 Qd2 16.Kd2+– cb4 17.Kc2 Kd7 18.Nf3 f6 19.Nd4+– Bd6 20.e4 Bg6 21.Nb3 Ra8 22.Kb2 Be5 23.d4+– Bd6 24.Bd3 b6 25.c5 bc5+/– 26.dc5 Be5+= 27.Kb1 Ra3= 28.Bc2 f5 29.f3 fe4= 30.fe4 Be4=+ 31.Rd1 Bd5–/+ 32.Rd3 Kc8–+ 33.g3 Bc3 34.Rc3 bc3 35.Nd4 Ba2 36.Kc1 Bc4 37.b6?? Ra1–+ 38.Bb1 Bd3 39.Nc2 Bc4 40.Na1+– Bd5 41.Bh7 Kb7 42.Nc2 Bb3 43.Nb4 Ba4 44.Be4 Kc8 45.b7 Kb8 46.Na6 (46...Ka7 47.b8Q Ka6 48.Qb6#) 1–0. Bittner,Hannjoerg – Schwieger,V, Stadt–M Braunschweig, 1985.

4.e3 d4 5.ed4+= cd4 6.Nf3 Qb6 (6...Bg4!? 7.h3 Bf3 8.Qf3 Qb6+=) 7.Bd4+/– Qb5?? (better is 7...Qd8+/–) 8.Bb5+– Nc6 (8...Nbd7 9.Bd7 Bd7 10.Ne5+–) 9.Ne5 Bd7 10.Qf3 Nd5 11.Qf7 Kd8 12.Qd5 Ne5 (12...Nb8 13.Nd7 e6 14.Qb7 Bd6 15.Nb8 Bc7 16.Be5 Ke7 17.Qc7 Kf8 18.Qg7) 13.Be5 e6 (13...Ke8 14.Bd7 Kd8 15.Be6 Ke8 16.Qd7) 14.Qd7 1–0. b4_player – Cidras, gamecolony.com, 2007.

4.e3 Nbd7 5.Nf3 Qc7 6.c4 e5 7.d3 d4=+ 8.e4 Be7 9.g3 Nf8 10.Bg2=+ Ne6 11.a4 0–0 12.a5 g6 13.0–0= Ng7 14.Nbd2 Nfh5 15.Qb3 Qd6 16.Rfe1 Be6 17.a6 b6 18.Bc1 Rae8 19.Nf1 Qc7 20.Bh6 Bd6 21.Ng5 Bc8 22.Qd1 f6 23.Nf3 Be6 24.Qc1 Qd7 25.Kh1 Kh8 26.Ng1 Qc7 27.h3 f5 28.Nd2 f4 29.g4 f3 30.Ndf3 Nf4 31.Bf4 Rf4= 32.Re2 Ref8 33.Raa2 Qe7 34.Nh2 h5 35.f3 Qh4 36.Qe1 Qe1 37.Re1 h4 38.Ne2+/– R4f7 ½–½. Rehbein,Hans Juergen (1775) – Bauer,Norbert (2085), Germany, 2005.

4.e3 Ne4 5.Nf3 (5.Ne2 Qd6 (5...e6 6.Nf4 Nd7 7.c4 Ndf6 8.d3 Nd6) 6.c4 dc4 7.Na3 Be6 8.Qc2 Qd3; 5.Be2 e6 (5...Nd7 6.Nf3 e5 7.0–0 Bd6 8.c4 dc4; 5...a6 6.ba6 Na6 7.Nc3 Nc3 8.Bc3 e6; 5...f6 6.f3 Nd6 7.f4 Bf5 8.Nf3 a6; 5...Qb6 6.Nc3 Nc3 7.Bc3 d4 8.Bb2 e5) 6.Nf3 Be7 7.0–0 0–0 8.d3 Bf6; 5.f3 Nd6 (5...Nf6 6.c4 e6 7.g4 h6 8.d4 Nbd7) 6.Be2 Bf5 7.f4 Qa5 8.a4 Nd7; 5.Qf3 e6 (5...Nd7 6.Nc3 Nc3 7.Bc3 Nf6 8.Bf6 ef6; 5...h6 6.Be2 e6 7.Nh3 a6 8.a4 ab5; 5...a6 6.Ne2 e6 7.Ng3 Nd6 8.Nh5 Qg5; 5...h5 6.h3 Rh6 7.Qd1 Nd7 8.Nf3 e5) 6.Nc3 Nf6 7.Be2 e5 8.Nh3 Qd6) 5...f6 (5...e6 6.Be2 Be7 7.0–0 0–0 8.d3 Bf6; 5...c4 6.Nc3 Nc3 7.Bc3 a6 8.ba6 Na6; 5...Bg4 6.Be2 e6 7.0–0 a6 8.a4 ab5; 5...a6 6.Nc3 Nc3 7.Bc3 f6 8.d4 e6) 6.Nh4 (6.Be2 e5 7.0–0 Be6 8.d4 ed4) 6...Be6 (6...g6 7.Be2 Qa5 8.Nf3 e5) 7.c4 (7.Be2!?= Qa5 8.Nc3 Nc3) 7...dc4+= 8.Na3 c3 (8...Nd6 9.Rc1 Qa5 10.Qh5 Bf7 11.Qc5–/+; 8...g5+=) 9.Bc3= Nc3 10.dc3 Qd1 (10...Qa5 11.Qc1=) 11.Kd1 Nd7 (11...a6 12.e4=) 12.Bd3 (12.Bc4 Bg8=) 12...0–0–0 13.Ke2 (13.Kc2 Bd5+=) 13...Nb6+= Black intends c4 14.Bf5 Bf5 15.Nf5 e6 16.Ng3 c4 17.Nb1 Na4 18.Rd1 Be7 19.Rd4 Rd4 20.cd4 Kc7 (20...Kd7 21.Ne4+=) 21.Ne4 a6 22.Nbc3 Nc3 23.Nc3 Bb4 24.Ne4 ab5 25.Rb1 Ba3 (25...Be7 26.Rb5 Ra8 27.Nc3=) 26.Rb5= Ra8 27.Nc3 Kc6 (27...Ra6 28.e4=) 28.Kd2 (28.e4 Rc8=) 28...Ra6 (28...Ra4! 29.e4 Bb4 30.d5 ed5 31.ed5 Kc7–/+) 29.e4= Bd6 30.a4 b6 (30...Bf4 31.Ke2 Bd6 32.d5 ed5 33.ed5 Kc7 34.Ke3=) 31.Ke3 e5 32.d5 Kd7 33.a5 (better is 33.Kd2!?=) 33...Ra5 (33...Bc5 34.Kd2 Ra5 35.Ra5 ba5 36.f3–/+) 34.Ra5 ba5 35.Na4 Kc7 36.Nb2 Bc5 37.Kd2 Kb6 (37...Bf2!? 38.Nc4 a4–/+) 38.Nc4+= Kb5 39.Ne3 a4 40.Kc3 h5 41.h3 Bd4 42.Kc2 Be3 43.fe3 h4 44.Kb2 g6 45.Ka3 f5 46.ef5 gf5 47.d6 Kc6 48.Ka4 Kd6 49.Kb4 Kd5 50.Kc3 Ke4 51.Kd2 f4 52.ef4 Kf4 53.Ke2 Kg3 54.Kf1 e4 55.Kg1 e3 56.Kf1 Kf4 0–1. Cwiertnia,A – Martyniak,J, corr Poland–ch3, 1961.

4.e3 e6 A) 5.Be2 Bd6 (5...Nbd7 6.f4 c4 7.Nf3 a6 8.ba6 ba6) 6.Nf3 Nbd7 7.c4 0–0 8.d4 cd4; B) 5.f4 Be7 (5...Bd6 6.Nf3 0–0 7.Be2 a6 8.a4 Re8; 5...a6 6.Nf3 c4 7.ba6 Na6 8.Be2 Bc5; 5...Bd7 6.Nf3 c4 7.Nc3 Bb4 8.Rb1 0–0; 5...c4 6.Nf3 Bd7 7.Nc3 Bb4 8.Rb1 0–0) 6.Nf3 0–0 7.Be2 a6 8.a4 ab5; C) 5.Nf3= Nbd7 (5...Bd6 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0 6.c4 c5); 5...a6 6.ba6 ba6 7.Be2 Bd6 8.Na3 c4) 6.c4 Bd6 7.Be2 0–0 8.d3 a6.

4.Nf3 Nbd7 5.e3= e6 6.c4 Bd6=+ 7.Be2 0–0 8.0–0 b6 9.Nc3= (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.0–0 b6 9.Nc3).

4.Nf3 e6 A) 5.Ne5 Bd6 (5...Nbd7 6.e3 Ne5 7.Be5 Bd6 8.Bd6 Qd6) 6.e3 0–0 7.f4 Ne4 8.Qf3 a6; B) 5.c4 Bd6 (5...Nbd7 6.e3 Bd6 7.Nc3 0–0 8.d4 Re8; 5...a6 6.ba6 Na6 7.e3 Be7 8.Be2 Bd7; 5...Be7 6.e3 a6 7.ba6 Na6 8.Be2 Bd7) 6.e3 Nbd7 7.cd5 ed5 8.Be2 0–0; C) 5.e3 Nbd7 (5...Bd6 6.c4 Nbd7 7.Be2 0–0 8.d4 cd4; 5...a6 6.ba6 ba6 7.Be2 Nc6 8.Qc1 Bd6) 6.c4 Bd6 7.Nc3 0–0 8.d4 Re8.

4.Nf3 g6 5.e3 b6 6.c4 Bf5 (6...Bg7 7.cd5 0–0 8.Bc4=) 7.Ne5 (7.cd5 Bg7+=) 7...dc4 (7...Bg7 8.Be2=) 8.Bc4+= Qd6?? (better is 8...e6+=) 9.Nf7+– Kd7 (9...Qd7 10.Nh8 Bg7+–) 10.Nd6 Kd6 11.Qf3 a6 12.Qa8 Nbd7 13.Qc6# 1–0. Taulien,Christian – Mahlow,Cerstin, remoteschach.de, 2001.

4.e3 Bd7

5.a4 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 =.

5.a4 a6 6.c4 dc4 7.Bc4 ab5 8.ab5 Ra1 9.Ba1 e6 (9...Bg4 10.Nf3 e6 11.h3=) 10.Nf3 (10.Qf3 b6=) 10...Be7 11.Nc3 0–0 12.0–0 b6 (12...Nd5 13.d4+=) 13.Ne5 Qc7 14.f4 Bc8 15.Be2 Bb7= 16.Bf3 Nbd7 17.Bb7 Qb7 18.Nc6 Bd8 19.Qf3+= Nb8 20.Ne4 Nd5 21.Qg4 f5 22.Nd8 Rd8= 23.Qg5 23...Qe7 24.Nc3 Qg5=+ 25.fg5 Nc3 26.Bc3 Nd7 27.Ra1 e5 28.Kf2 g6 29.d4= cd4 30.ed4 ed4 31.Bd4+= Nc5 32.Bc5 bc5 33.b6 Rd2 34.Ke3 Rb2 35.Ra8 Kf7 36.Ra7 Ke6 37.b7 Kd5 38.Kd3 Rb4 39.Kc3 Rc4 40.Kb3 Rb4= 41.Ka3 Rb1 42.Ka2+= Rb4 43.Ka3 Rb1 44.Ka2 Rb4 45.Ka1 Rb3 46.Ka2= Rb4 ½–½. Van Wensen – Rongen, Boxmeer, 1994.

5.a4 a6 6.d4 cd4 7.c4? (7.Bd4!? ab5 8.ab5 Ra1 9.Ba1=) 7...dc3 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 e6 11.Qa8 Bb4 12.Nge2? (12.Bd3!? Nc6 13.Qd8 Nd8 14.Nge2–/+) 12...0–0 13.g3? (13.Ba3 Qe7 14.Bb4 Qb4–+) 13...Qa5 14.Qa5 Ba5 15.Bg2 Bb5 16.0–0? Be2 17.Ne2 Bc7 18.Rb1 Nbd7 19.Bf6 Nf6 20.Rb7 Be5 21.f4 Bd6 22.Nd4 Bc5 23.Rc7 Bd4 24.ed4 h5 25.h3 Rd8 26.Kf2 Ne4 27.Be4 de4 28.Ke3 f5 29.g4 fg4 30.hg4 h4 31.Ke4 Kh7 32.Rc3 Kg6 33.Rh3 Rh8 34.f5 ef5 35.gf5 Kf6 36.Kf4 Rd8 37.Ke4 Rh8 38.d5 Rh5 39.d6 Rf5?? 40.d7+– Ke7 41.Kf5 Kd7 42.Kg6 Ke6 43.Kg7 1–0. MasterofDisaster – Okafor, Live Game Caissa's Web, 2004.

5.a4 a6 6.Nf3 b6 =.

5.a4 Bg4 6.Be2 Be2 7.Ne2 =.

4.e3 Bf5

5.d3 e6 6.g3 Be7 7.Bg2 Qa5 8.Nc3 d4 (better is 8...a6 9.ba6 Ra6+=) 9.Nge2?? (9.Bb7 dc3 10.Bc1 c4=) 9...Nbd7?? (9...dc3 10.Nc3 Qb6 11.a4–+) 10.0–0?? (better is 10.ed4 cd4 11.Nd4=) 10...dc3–+ 11.Bc3 Qc7 12.Rb1 Rd8 13.e4 Bg4 14.f3 Bh5 15.Nf4 e5 16.Nd5? Nd5 17.ed5 b6 18.g4 Bg6 19.f4 0–0?? 20.f5= Nf6 21.fg6 hg6 22.h3 Nd5 23.Bd2 c4–/+ 24.Be4 Bc5 25.Kg2 Be3 26.Bd5= Bd2 27.Qd2? Rd5–+ 28.Rf3 e4! 29.Re3 Qf4 30.d4 c3 31.Qc3+= Rfd8 32.Rf1 Qg5 33.Re4 f5 34.Ref4 fg4 35.Rg4+– Qe7 36.Re1 Qb7 37.Qc6 Qf7 38.Rg6 Qf5? 39.Qe6 Qe6+/– 40.Rge6 Rb5 41.Re8 Re8 42.Re8 Kf7 43.Ra8 a5 44.a4 Rb2 45.Rc8 Ra2 46.Rc6 Ra4 47.Rb6 Rc4 48.Rb2 Rd4 49.c3 Rc4 50.Ra2 a4 51.Kf2 Ke6 52.Ke2 Kd5 53.Kd2 Rh4 54.c4 Kc5 55.Ra4+= Rh3 (55...Rh3 56.Ra8 Kd4+=). MasterofDisaster – NightClub, Live Game Caissa's Web, 2004.

5.Be2 e6 6.Nf3 Bd6 7.Nh4 Be4 8.d3 Bg6.

5.Ne2 Nbd7 6.Ng3 Bg6 7.f4 e6 8.Be2 Bd6.

5.Ne2 e6 6.Ng3 Bg6 7.h4 h6 8.Be2 Bd6.

5.Nf3 Nbd7 6.Be2 e5 7.Ne5 Ne5 8.Be5 Bd6 9.d4 c4 10.Nc3?? (better is 10.0–0+=) 10...Bb4–+ 11.0–0 Bc3 12.Rc1 0–0 13.Bf3 Ne4 14.Be4 Be4 15.Qg4 Bg6 16.h4 Qc8 17.Qg3 Qf5 (better is 17...f6 18.Bd6 Re8–+) 18.e4–/+ Qe4 19.Qc3 Qh4 20.Rfe1 Rfe8 21.Bg3 Qf6 22.Be5 Qf5 23.a4 f6 24.Bg3 Re1 25.Qe1 Re8 26.Qa5 Qg5 (26...h5 27.Qc7–+) 27.Re1–/+ Re1 28.Qe1 Qg4 29.Qe7 Qd1 (29...h5!? 30.Qb7 Qd4–/+) 30.Kh2= Qh5 (30...Qd4?? 31.Qe6 Bf7 32.Qc8 Be8 33.Qe8) 31.Kg1 Qd1 32.Kh2 Qh5 (32...Qd4?? 33.Qe6 Bf7 34.Qc8 Be8 35.Qe8) 33.Kg1 Qd1 ½–½. Tiedemann,Joern (2125) – Ruhl,Clemens (1905), RS–Pyramide remoteschach.de, 2007.

5.Nf3 Nbd7 6.Be2 e5 7.Ne5+= Ne5 8.Be5 Be7 9.0–0 0–0 10.d4 Nd7 11.Bg4 Bg4 12.Qg4 Nf6 (12...Ne5 13.de5 Qc7 14.Qf5+=) 13.Qg5 h6 14.Qg3 Re8 (14...Qa5!? 15.a4 Rfc8+/–) 15.Nc3+– cd4 16.Bd4 Rc8 17.Rfd1 g5 (17...Bd6 18.f4 Bc5 19.Bf6 Be3 20.Qe3 Qf6 (20...Re3? 21.Bd8 Rcc3 22.Rac1+–) 21.Nd5 Re3 22.Nf6 gf6+/–) 18.Qh3+– Kh7 19.Qf5 Kg8 20.h4 Qd7 21.Qd7 Nd7 22.hg5 hg5 23.Nd5 f6 (23...Rc2 24.Ne7 Re7 25.Rdc1 Rc1 26.Rc1+–) 24.Ba7 Bc5 (24...Rc2 25.e4 Nc5 26.Bc5 Rc5 27.a4+–) 25.Bc5 Rc5 26.Kf1 (26.Rd2!? Kf7+–) 26...Re5 27.c4! Kf7 (27...Rc4 28.f4 Combination) 28.Rd4 f5 29.a4 Nf6 (29...Re4 30.Re4 fe4 31.a5+–) 30.Nf6 Kf6 31.a5 Rc8 32.a6 ba6 33.Ra6 Ke7 34.Ra7 Ke8 (34...Ke6+–) 35.Rh7 Rec5 36.b6 (36.b6 Rc4 37.b7 Rc1 38.Ke2 R8c2 39.Kf3+–) 1–0. Taulien,Christian (2110) – Kaupat,Thomas, remoteschach.de, 2006.

5.Nf3 e6 6.Be2 Bg4 7.h3 Bf3 8.Bf3 a6.

4.e3 Bg4

5.Be2 Be2 6.Qe2 e6 7.Nf3 Be7 8.0–0 0–0.

5.Be2 Be2 6.Ne2 a6 7.ba6 Na6 8.0–0 =.

5.Be2 Be2 6.Ne2 Nbd7 7.0–0 e6 8.d3 Bd6 9.h3 Qb6 10.c4 0–0 11.Nd2 a6 12.a4 ab5 13.ab5 Be5 14.Qc2 Bb2 15.Qb2 Rfd8 16.Ra8 Ra8 17.Ra1 Ra1 18.Qa1 dc4 19.dc4 Qd6 20.Nf3 h6 21.Kf1 e5 22.Ke1 Qd3 23.Qc3 (23.Qa8 Kh7 24.Qa4 e4=+) ½–½. St_Jean,Benoit (1665) – Zednik,Martin (1640), WC.2005.P.00012, 2002.

5.Be2 Be2 6.Ne2 e6 7.0–0 Bd6 8.d3 0–0 9.Nd2 Nbd7 10.Ng3 Qb6 11.c4 Be5 12.Be5= Ne5 13.Nf3 Qd6 14.Ne5 Qe5 15.d4 ½–½. Mallmann,Bernd (1885) – Naeckel,Gerhard (2180), Saarlouis op 7th, 2004.

5.Ne2 a6 (5...Qd6 6.f3 Bd7 7.a4 a6 8.Na3 e5; 5...e6 6.f3 Bf5 7.g4 Bg6 8.Nf4 Nbd7; 5...c4 6.h3 Bh5 7.g4 Bg6 8.Nf4 e6; 5...Qb6 6.h3 Bf5 7.Nf4 Qd6 8.g4 e5) 6.h3 Bd7 7.Bf6 ef6 8.Nec3 Be6.

5.f3 Bd7 (5...Bf5 6.g4 Bc8 7.g5 Nfd7 8.f4 e5; 5...Bc8 6.f4 Bf5 7.Nf3 e6 8.Be2 a6; 5...Bh5 6.g4 Bg6 7.h4 h6 8.Ne2 e6) 6.g4 e6 7.g5 Ng8 8.f4 c4.

5.Nf3 Nbd7 6.c4 e6 7.Be2 Bd6 8.0–0 0–0 9.cd5 ed5 10.d4 b6 11.Nbd2 Re8 12.h3 Bh5 13.Re1 Rc8 14.a4 c4 15.Bc3 Qc7 16.Qc2 Ne4 17.Ne4 de4 18.Nd2 Be2 19.Re2 f5 20.f4 Nf6=+ 21.Rc1 Nd5 22.g3 Qe7 23.Qa2= Kf8 (better is 23...Ba3!? 24.Bb2 Bb2 25.Qb2 c3=+) ½–½. Arnold,Ingo – Wenner,Heinz, Bergisch Gladbach–ch, 1994.

5.Nf3 e6 6.h3 Bh5 7.g4 Bg6 8.Ne5 Nbd7.

3.b5 c6

4.a4 Qb6 5.e3 a6 6.c4 e6 7.d3 Bb4 8.Nc3 dc4 9.dc4 Ne4 10.Qb3 Qa5–/+ 11.Rc1 0–0 12.Nf3 cb5 13.cb5 ab5 14.Bb5= Nc6 15.0–0 Nc3 16.Bc3 Bc3 17.Qc3 Nb4 18.Qb3 Nd5 19.Rc2 b6 20.Rfc1 Ba6 21.e4 Bb5 22.ab5 Nf4 23.Ne5 Qa4? 24.Qa4+– Ra4 25.Nd7 Rd4 26.Nf8+– Kf8 27.Rc8 Ke7 28.e5?? Ne2= 29.Kf1 Nc1 30.Rc1 Kd7 31.Rc6 Rd5 32.Rb6 Re5 33.Rb7 Ke8 34.b6 h6 35.Rc7+/– Rb5?? 36.b7+– Rb1 37.Ke2 g5 38.Rc8 Kd7 39.b8Q Rb8 40.Rb8 Ke7 41.Rb7 Kf6 42.Ke3 Kg6 43.g3 f5 44.h3 h5 45.Rb5 Kf6 46.Rb6 Ke7 47.f3 Kf6 48.Kd4 Ke7 49.Ke5 h4 50.Re6 Kd7 51.gh4 gh4 52.Kf5 Kc7 53.Ke5 Kd7 54.f4 Kc7 55.f5 Kd7 56.f6 Kc7 57.f7 Kd7 58.f8Q Kc7 59.Qf7 (59...Kc8 60.Re8#) 1–0. Francia,Pasquale – El Paron, 5 minutes game, 2005.

4.a4 c5 5.e3 d4 (5...Bf5!?=+) 6.ed4+= cd4 7.Nf3 e5 (7...Bg4 8.h3 Bf3 9.Qf3+/–) 8.Ne5+/– Bd6 (8...Qd5 9.Nf3 Bc5 10.Be2+/–) 9.Nf3 (9.Bd4 0–0+/–) 9...Bg4 (9...0–0 10.Bd4 Re8 11.Be2+/–) 10.Be2 Bc5 11.d3 Bb6 12.Nbd2 0–0 13.0–0 Nbd7 14.Nd4+– Bd4 15.Bd4 Be2 16.Qe2 b6 17.Bf6 Nf6 18.Ne4 Re8 19.Nf6 Qf6 20.Qg4 Re5 21.Rfe1 Rae8 22.Re5 Qe5 23.Rf1 f5 24.Qc4 Kh8 25.f4 Qe3 26.Kh1 h6 27.Qc3 Kh7 28.h3 Qg3 29.Qd2 Re3 30.d4 g5 31.fg5 Qg5 32.d5?? Rh3!–+ 33.gh3 Qd2 34.Rf5 0–1. var – sometimes, Live Game Caissa's Web, 2004.

4.a4 Bd7 5.e3 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd7).

4.a4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5).

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.b5).

4.Bf6 ef6 5.e3 +=.

4.Bf6 gf6 5.e3 Bg7 (5...e5 6.Nf3+=) 6.a4 (6.Nf3 a6=) 6...0–0 (6...a6 7.Nc3=) 7.Nf3 (7.Qh5 f5 8.c3 a6 9.ba6 Na6=) 7...Bg4 (7...e5 8.Nc3=) 8.Be2 (8.h3 Bh5=) 8...a6 9.h3 (9.bc6 Nc6 10.0–0 Rc8=) 9...Bh5 (9...Bf3!? 10.Bf3 ab5–/+) 10.g4 (10.Ra3 c5=) 10...Bg6 11.Nc3 (11.bc6 Nc6 12.Nc3 b6=) 11...Qa5 (11...ab5 12.ab5 Bc2 13.Qc1 Ra1 14.Qa1+=) 12.Nd4 (12.Rb1 ab5 13.ab5 Rd8=) 12...ab5+= 13.ab5?? (better is 13.Nb3 Qb4 14.ab5 Ra1 15.Na1+=) 13...Qa1–+ 14.Qa1 (14.f4 Qb2 15.0–0 e5–+) 14...Ra1 15.Nd1 (15.Bd1 f5! 16.gf5 Bd4 17.fg6 Bc3 18.gh7 Kh7 19.dc3 Rg8–+) 15...c5 (15...e5 16.Nf5–+) 16.Nb3 Rb1 17.d3 Nd7 (17...c4 18.dc4 dc4 19.Nd4–+) 18.Kd2 (18.h4 h6–+) 18...b6 (18...f5 19.f4–+) 19.Rh2 (19.h4 h6–+) 19...e6 20.h4 h6 21.f4 (21.h5 Bh7–+) 21...Ra8 22.h5 Bh7 23.Rg2 Kf8 24.Nc3 Rh1 25.Nd1 Ra2 26.Nc1 Ra5 27.Nf2 Rh4 28.d4 c4 29.Rg3 Rb5 30.Nh3 Rb2 31.f5 ef5 32.Nf4 fg4 33.Nd5 Rc2 34.Ke1 Rc1 (34...Rc1 35.Kf2 Rh2 36.Rg2 Rg2 37.Kg2 Be4 38.Kf2 Bd5 39.Bg4 c3 40.Bd7 c2–+) 0–1. mic (2190) – rr (2290), net–chess.com, 2008.

4.a4 a6

5.e3 ab5 6.ab5 Ra1 7.Ba1 Qa5 8.Nc3 e5 9.bc6 bc6 10.Nf3 Bd6 11.Be2 Ba6 12.0–0 Be2 13.Ne2 0–0 14.Ne5 Re8 15.d4 Qc7 16.c3 Be5 17.de5 Qe5 18.c4 Qd6 19.Bf6 gf6 20.cd5+– Rd8 21.Qc1 Qd5+/– 22.Nf4 Qd6 23.g3 c5 24.Qc4 Re8 25.Rc1 Nd7 26.Kg2 Re5 27.Rc2 Nb6 28.Qc3 Qd5?? 29.Nd5+– (29...Nd5 30.Qa5+–) 1–0. Bittner,Hannjoerg – Hanfland,A, corr, 1988.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bf5 8.Nf3 Bg4 9.c4 Nbd7 10.Qa4 Nb6 11.Qa5 Bf3 12.gf3 Qa8?? 13.Qa8?? Na8+= 14.c5 e5 15.Be5 Nd7 16.bc6 bc6 17.Bc3 Nc5 18.d4 Ne6 19.f4 f5 20.Bd3 g6 21.Ke2 Nac7 22.Rc1 Bd6 23.Nd2 Kd7 24.Nf3 Ra8 25.h4 Ra2 26.Rc2 (White gets the initiative) 26...Ra3 27.h5+= Ne8 28.hg6+– hg6 29.Nh4 Nf8 30.Ng6! Ng7 31.Nh4 Ke6 32.Bd2 c5? 33.dc5 Bc7 34.Bc3 (34...Kf7 35.Bb2+–) 1–0. Schiffler – Keil, corr, 1950.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Bg4 8.Nf3 Nbd7 9.Bf6 Nf6 10.d4 Qa5 11.Nbd2 Ne4 12.bc6 Bf3 13.cb7+– Qb4 14.b8Q Qb8 15.Nf3 Qb4 16.Nd2 e6 17.Bd3 Nd2 18.Qd2 Qb1 19.Qd1 Qb4 20.Ke2 Qa5 21.Qa1 Qd8 22.Qa4 Qd7?? 23.Bb5+– (23...Bd6 24.Bd7 Ke7 25.Bc6+–) 1–0. Loetzbeier – Zimmer, (year?).

5.e3 Bg4 6.f3 Bd7 7.f4 =.

4.a4 cb5

5.ab5 a6 6.e3 Bd7 7.Nf3 e6 8.d4 Bb4 9.c3 Bd6 10.Be2 0–0 11.0–0 Ne4 12.Nbd2 Be8 13.Ne4 de4 14.Nd2 Qh4 15.g3+– Qh3 16.Bg4 Qh6+/– 17.Ne4 Be7 18.Be2 Bc6?? 19.bc6+– bc6 20.Bf3 Nd7 21.Nc5 Nf6 22.Bc6 Ng4 23.h4 Nf6 24.Ba8 Bd6 25.Ne4 Ne4 26.Be4 f5 27.Bf3 Rf6 28.Ra6 Be7 29.d5 Rg6 30.Re6 Bf6 31.Kh2 f4 32.ef4 Bh4 33.Rg6 Bg3 34.Kg3 Qg6 35.Bg4 h5 36.Re1 Qg4 37.Qg4 hg4 38.Kg4 (38...g6 39.d6 Kf7 40.d7 g5 41.f5 Kg7 42.Kg5 Kf7 43.d8Q Kg7 44.Re7#) 1–0. Hugi – Nautiluschess, ICS blitz, 2000.

5.ab5 e6 6.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 cb5 6.ab5).

4.a4 Nbd7

5.e3 e5 6.c4 Bd6 7.Nf3 0–0 8.Be2 e4 9.Nd4 c5 10.Nf5 Ne5 11.Nd6=+ Qd6 12.d3 ed3 13.Bd3 Bg4 14.Be2? Be2 15.Qe2 Nc4 16.Bc3 Ne5 17.0–0 Rad8 18.Bb2 Neg4 19.Nc3?? Qh2# 0–1. stoker – jeanne2, Live Game Caissa's Web, 2006.

5.e3 e5 6.Nf3 Bd6 7.Nc3 0–0 8.a5 a6 9.b6 Nc5 10.d4 e4?? (better is 10...ed4 11.Nd4 Ng4+=) 11.dc5+– Bc5 12.Nd4 Bb4 13.Be2 Re8 14.0–0 Bd7 15.f4 (15.Nb3 Qe7+–) 15...Qe7 (15...ef3!? 16.Bf3 Qe7+/–) 16.f5 Qe5 17.Na2 Ba5 18.Rb1 (better is 18.Nc6!? Qb2 19.Na5+/–) 18...Bb6+= 19.Nc6 Bc6?? (better is 19...Be3 20.Kh1 Qd6=) 20.Be5+– (20.Be5 Be3 21.Kh1 Re5 22.c3+–) 1–0. MasterofDisaster – dumdago, Live Game Caissa's Web, 2004.

5.Nf3 Qc7 6.e3 e5 7.c4 e4 8.Nd4 Bc5 9.cd5 cd5 10.Nf5 0–0 11.Ng3 Ne5 12.Nc3 Bg4 13.Be2?? (Better is 13.Qc2 Bb4 14.d4 ed3 15.Bd3=+) 13...Nd3–+ 14.Bd3 (14.Kf1 Nb2 15.Qb3 Nc4 16.Bc4 dc4 17.Qc4 Be6–+) 14...Bd1 15.Nd1 ed3 16.Nc3 Ne4 17.Nd5 Qd6 18.Nf4 Nf2 19.Kf2 Qf4 20.Ke1 Be3! 21.de3 Qe3 22.Kd1 Rac8 23.Re1 Qf4 24.Re4 Qf2 25.Bd4 Qc2 26.Ke1 Rfe8 27.Re8 Re8 28.Kf1 d2 29.Ne2 d1Q 30.Rd1 Qd1 31.Kf2 Qe2 32.Kg3 Re4 33.Ba7 Qg4 34.Kf2 Re2 35.Kf1 0–1. OPA – TonySlydini, Live Game Caissa's Web, 2004.

4.a4 Bf5

5.e3 Nbd7 6.Nf3= Qc7 7.c4 (7.Nh4 Bg4 8.f3 Be6=) 7...dc4 (7...cb5 8.cd5 Bc2 9.Qc1=) 8.Bc4= e6 9.0–0 Nb6 10.Bb3 cb5=+ 11.ab5 Bd6 12.g3 Nfd5 13.Nc3 Nc3 14.Bc3 f6 15.Rc1 0–0–0?? 16.Bd4+– 1–0. stoker – corsario, Live Game Caissa's Web, 2004.

5.e3 e5 6.Nf3 e4 7.Nd4 Bg6 8.Be2 Bd6 9.0–0 Qc7 10.h3 c5 11.Nb3 Nbd7 12.c4 0–0 13.Nc3 d4 14.ed4 cd4 15.Nd4 Rad8 16.Qb3? (16.a5 Qc5 17.Nd5 Nd5=) 16...Bc5 (Better is 16...Nc5 17.b6 Qe7–+ (17...Nb3 18.bc7 Nd4 19.cd8R Rd8 20.Bd1+=)) 17.Nc2 Qf4 18.Ne3 Qg5 (18...Bd6 19.g3 Qh6 20.Kg2=+) 19.Kh1 Ne5 20.Ncd5 Be3 21.Nf6 Qf6+= 22.de3 Rd2 23.Bd4 Re2–/+ 24.Be5? Qe5–+ 25.f4 Qh5 26.Qd1 Rb2 27.Rb1?? Qf5?? 28.Rb2+– Bh5? 29.Qd2 Qf6 30.Ra2 Rd8 31.Qd8?? Qd8–/+ 32.Raf2? g6?? 33.g4–/+ –/+. OPA – karvapawnov, Live Game Caissa's Web, 2004.

5.e3 e6 6.f4 =+.

3.b5 Bd7

4.e3 a6

5.c4 ab5 6.cb5 e6 (6...Bf5 7.Bf6 (7.Be2 e6 8.Nf3 Bd6 9.0–0 0–0 10.d3 Bg4 11.Nbd2 c5 12.h3=; 7.Ne2 Nbd7 8.Ng3 Bg6 9.f4 e6 10.Be2 Ne4 11.Ne4 de4 12.0–0=; 7.Nf3 e6 8.Be2 Bd6 9.0–0 0–0 10.d3 Bg4 11.Nbd2 c5 12.h3=) 7...ef6 8.Nf3 Bd6 9.Be2 0–0 10.Nc3 Be6 11.0–0 Ra3 12.Qc2=; 6...Ra5 7.a4 (7.Bc3 Ra8 8.Nf3 Bg4 9.h3 Bf5 10.d3 Bd7 11.a4 e6 12.Ne5=; 7.Qf3 Bg4 8.Qf4 Nbd7 9.Bc3 Ra8 10.f3 Bh5 11.Bf6 Nf6 12.b6–/+; 7.Qb3 Bf5 8.Nf3 e6 9.Nd4 Bg6 10.Be2 Nbd7 11.0–0 Nc5 12.Qd1+=) 7...e6 8.Nf3 c6 9.Bc3 Ra7 10.Bd3 Ne4 11.0–0 Nc3 12.Nc3=; 6...c5 7.Qc2 (7.Nf3 e6 8.Be2 Be7 9.a4 0–0 10.0–0 Bd6 11.d3 Ng4 12.h3=; 7.a4 Bf5 8.Ne2 Nbd7 9.Ng3 Bg6 10.f4 e6 11.Be2 Bd6 12.0–0+=; 7.bc6 Nc6 8.Nf3 e6 9.Be2 Bd6 10.0–0 0–0 11.Nc3 e5 12.Nb5+=) 7...e6 8.Nf3 Be7 9.Be2 c4 10.a4 Qa5 11.0–0 0–0 12.Ng5=) 7.Nf3 (7.Be2 c5 8.Nf3 Be7 9.0–0 Qb6 10.a4 0–0 11.d3 Na6 12.Nbd2=; 7.Be5 c5 8.Nc3 Be7 9.Nf3 0–0 10.Qc2 Ng4 11.Bf4 Ra3 12.Be2=; 7.Bd3 c5 8.Be2 Be7 9.Nf3 c4 10.Nc3 Qa5 11.a4 0–0 12.0–0+=) 7...Bd6 (7...c5 8.bc6 Nc6 9.Be2 Bd6 10.0–0 e5 11.d4 e4 12.Ne5+=) 8.Nc3 (8.Be2 0–0 9.0–0 c5 10.a4 Qe7 11.Ne5 Bc8 12.a5=) 8...0–0 (8...e5 9.Be2 0–0 10.0–0 c5 11.bc6 Nc6 12.Nb5+=) 9.Be2 Qe7 (9...e5 10.0–0 c5 11.bc6 Nc6 12.Nb5+=) 10.d4 c5 (10...c6 11.0–0 Rc8 12.Ne5+=) 11.bc6 (11.dc5 Bc5 12.0–0=) 11...bc6 (11...Nc6 12.0–0+=) 12.0–0 Na6 13.Ba6 Ra6 14.Qe2 Rfa8 15.Rfc1 h6 16.Ne5 Be8 17.f4 c5 18.h3 Rb6 19.dc5 Bc5 20.Kh1 Be3! 21.Qe3 Rb2 22.Rab1 Rab8 23.Rb2 Rb2 24.Ra1 Qb7 25.Nd3?? (better is 25.Qf3–/+) 25…d4!–+ (25...d4 26.Nb2 de3–+) 0–1. Kosar,Matej (1720) – Chladek,Va (2045), 9th Niki Open, 2011.

5.c4 ab5 6.cd5 A) 6...b4 7.Bf6 (7.Qf3 Ra5 8.Bc4 Bg4 9.Qf4 Nbd7 10.a3 e5 11.de6 fe6 12.ab4+=; 7.Bc4 b5 8.Bb3 e6 9.de6 fe6 10.Nf3 c5 11.Ne5 c4 12.Qf3+=; 7.Qb3 e6 8.de6 Be6 9.Bc4 Bc4 10.Qc4 Nbd7 11.Nf3 Bd6 12.0–0=) 7...ef6 8.d4 Bd6 9.Nd2 0–0 10.Bd3 Na6 11.Qc2 h6 12.Ngf3=; B) 6...Na6 7.Bf6 (7.Qb3 Nc5 8.Qc2 Na4 9.Bf6 ef6 10.Nc3 c6 11.Nf3 Nc3 12.dc3=; 7.Nf3 Nd5 8.Qb3 e6 9.d4 b4 10.e4 Nf6 11.Bd3 Bc6 12.Nbd2+=; 7.Bd4 Nd5 8.Qb3 Ndb4 9.Nf3 c6 10.a3 c5 11.Bc5 Nc5 12.Qb4+=) 7...ef6 8.Nf3 Be7 9.d4 0–0 10.Qb3 c6 11.Be2 Nb4 12.0–0=; C) 6...Nd5 7.Qb3 c6 8.Bb5 Be6 9.Be2 Nb6 10.Qc2 Ra2 11.Ra2 Ba2 12.Nc3+=.

5.c4 dc4 6.ba6 A) 6...b5 7.a4 (7.d3 cd3 8.a7 Ra7 9.Bd3 c5 10.Nf3 c4 11.Be2 e6 12.0–0–/+; 7.Nf3 Na6 8.a4 c6 9.ab5 cb5 10.d3 cd3 11.Bd3 Nc5 12.0–0+=; 7.a7 Ra7 8.Nf3 e6 9.Ne5 Bc5 10.d3 Bb4 11.Nc3 Ra3 12.Rc1–+) 7...ba4 8.Bc4 e6 9.Nf3 Bd6 10.Qe2 Nd5 11.0–0 0–0 12.Bd4=; B) 6...Na6 7.Bc4 e6 8.Nf3 Nb4 9.Nc3 Bd6 10.d3 0–0 11.0–0 Ra5 12.a3=.

5.c4 dc4 6.b6 A) 6...Bc6 7.Nf3 (7.Na3 cb6 8.Nc4 b5 9.Ne5 e6 10.Ngf3 Bd6 11.Be2 0–0 12.0–0–/+; 7.f3 cb6 8.Bc4 e6 9.Ne2 b5 10.Bb3 Bd6 11.0–0 0–0 12.e4–/+; 7.Bf6 ef6 8.Qh5 g6 9.Qg4 cb6 10.Bc4 Nd7 11.f4 b5 12.Be2–/+) 7...Nbd7 8.Na3 Nb6 9.Nc4 Nbd7 10.Na5 Bd5 11.Bc4 Nb6 12.Bd5–/+; B) 6...Nd5 7.Na3 (7.Bc4 Nb6 8.Be2 e6 9.Nc3 Bc6 10.Nf3 Bd6 11.0–0 0–0 12.d3–/+; 7.d3 Nb6 8.dc4 e6 9.Nf3 Na4 10.Ba3 Ba3 11.Na3 Qe7 12.Qb3–/+; 7.bc7 Qc7 8.Nf3 b5 9.e4 Nb6 10.d3 Na4 11.Bd4 cd3 12.Bd3–/+) 7...Nb6 8.Nc4 Na4 9.Ne5 Nb2 10.Qb3 Be6 11.Qb7 Bd5 12.Qb2+=; C) 6...e6 7.Bc4 (7.Nf3 cb6 8.Bc4 b5 9.Be2 Nc6 10.0–0 Bd6 11.d4 0–0 12.Nbd2–/+; 7.Na3 Ba3 8.Ba3 Bc6 9.Rc1 cb6 10.Rc4 b5 11.Rc1 Bd5 12.Qc2–/+; 7.bc7 Qc7 8.d3 Bb4 9.Bc3 Nd5 10.Bb4 Nb4 11.Qd2 cd3 12.Bd3–+) 7...cb6 8.Nf3 b5 9.Bb3 Bc6 10.0–0 Bd6 11.d3 0–0 12.Qe2–/+; D) 6...cb6 7.Bc4 e6 8.Nf3 b5 9.Be2 Nc6 10.0–0 Bd6 11.Qc2 Nb4 12.Qb3–/+.

5.c4 dc4 6.Bc4 ab5 7.Be2 (7.Bb3 e6 8.Nf3 Bc6 9.0–0 Bd6 10.d3 0–0 11.e4 Nbd7 12.Nbd2–/+; 7.Bf1 b4 8.Nf3 e6 9.d4 Bd6 10.Bd3 0–0 11.Qe2 Nc6 12.0–0–/+; 7.Bd3 Bc6 8.Bf1 e6 9.Nf3 Bd6 10.d4 0–0 11.Bd3 b4 12.0–0–/+) 7...e6 8.Nf3 b4 9.a3 Ba4 10.Qc1 Bc6 11.0–0 Bd6 12.ab4 –/+.

3.b5 Nbd7

4.a4 e5 5.Nf3 Bd6 6.e3 =+.

4.a4 e6 5.e3 Bd6 6.Na3 0–0–/+ 7.c4 Qe7 8.Nf3 a6 9.Be2 Nb6 10.d3 Bb4–/+ 11.Nd2 dc4–+ 12.dc4 Rd8 13.Bf6 Qf6 14.0–0 Rd2 15.Qc1 Re2 16.Qd1 Rd2 17.Qc1 Na4 18.Nc2 Qc3 19.Ra4 Rc2 20.Qd1 Rd2 21.Qb1 a5 22.Rd1 b6 23.Ra2 Rd1 24.Qd1 Qe1 25.Qe1 Be1 26.Ra1 Bb4 27.Rd1 Bd6 28.e4 e5 29.g3 Bb7 30.f3 f6 31.Kf2 Rd8 32.Ke2 Be7 33.Rc1 Rd4 34.h4 Bb4 35.Ke3 Bd2 36.Ke2 Bc1 37.f4 Kf7 38.fe5 fe5 39.Kf3 Be4 40.Kg4 Kg6 41.h5 Kf6 42.Kh4 Bg5 43.Kh3 Bf5 44.g4 Bg4 45.Kg2 Rd3 46.Kh2 Kf5 47.Kg1 Kf4 48.Kf1 Kf3 (49.Ke1 Bh4 50.Kf1 Rd1#; 48...Kg3 49.c5 Rd1#) 0–1. debit – Krapulik, Live Game Caissa's Web, 2005.

4.e3 c6 5.Nc3 e5 6.Bd3 Be7 7.Qf3? (7.bc6 bc6 8.Rb1 Rb8=+) 7...0–0 (7...e4!? 8.Ne4 de4 9.Be4–+) 8.Qh3 (8.Qg3 cb5 9.Bb5 d4 10.ed4 ed4=) 8...e4 (8...Nc5 9.Bf5 cb5 10.Bc8 Rc8 11.Nb5 Qb6–+) 9.Qg3?? (Better is 9.Be2–/+) 9...ed3–+ 10.e4 dc2 11.ed5 Re8 12.Nge2 cd5 13.Nd5 Bf8 14.Nc7 Ne4 15.Qf4 g5 16.Qe3 Qc7 17.0–0 Bd6 18.f4 Nef6 19.Qc3 Re2 20.Qc7 Bc7 21.fg5 Ne4 22.Rac1 Rd2 23.Rf5 Rd1 24.Rf1 Bb6 25.Kh1 0–1. Taulien,Christian – Ruprich,Tony, remoteschach.de, 2001.

4.e3 e5 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.Nf3 e6 =+.

3.b5 e6

(--> 1.b4 e6 2.Bb2 Nf6 3.b5 d5).

4.d4 Bd6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.d4).

4.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5).

4.e3 a6 5.a4 ab5 6.ab5 Ra1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1).

4.Nf3 c5 5.e3 b6 6.c4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5).

4.e3 c5

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5).

5.d4 Nbd7 6.c4 b6 7.a4 Bb7 8.Nf3 Bd6 9.Be2 0–0 10.0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.0–0 b6 9.a4 Bb7 10.d4).

5.Nf3= Nbd7 6.c4 Bd6 7.Nc3 0–0 8.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.Nc3).

4.e3 Bd6

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6).

5.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0).

4.e3 Be7

(--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7).

5.Nf3 Nbd7 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.c4 Nbd7).

4.Nf3 Bd6

5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3).

5.e3 c6 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0 6.c4 c6).

3.b5 Bf5

4.Nf3 e6 5.Bf6 Qf6 6.d4 c5 7.e3 cd4 8.ed4 Nd7 9.Bd3 Be4 10.Nbd2 Bb4 11.Rb1 Bf3 12.Qf3 Bd2 13.Kd2 Qd4 14.c3 Qa4 15.Rb2 Rc8 16.Bc2 Qa5 17.Re1 Nb6 18.Rb3 Qa2 19.Qd3 h6 20.Kc1 Na4 21.Qd4 0–0 22.Qd3 g6 23.Qd4 Rc4 24.Qa7 Rc3 25.Rc3 Qb2 26.Kd1 Nc3 27.Kd2 Rc8 28.Rc1 Na2 29.Ke1 Qc1 30.Bd1 Nc3 31.Qd4 Rc4 0–1. Bestia02c – Phalanx22, computer chess game, 2000.

4.e3 Nbd7

5.d4 e6 6.Nf3 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.d4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7).

4.e3 e6

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

4.Nf3 Nbd7

5.d4 e6=+ 6.e3 Bd6 7.Bd3 Bd3 8.cd3 0–0 9.0–0 a6 10.ba6 Ra6 11.Nc3 c6 12.e4 de4 13.de4= Be7 14.Nd2 Re8 15.Kh1 e5 16.Ne2 Bf8 17.Qc2 Qa8 18.de5 Ne5 19.f4 Neg4=+ 20.Bd4 c5 21.Bg1 b5 22.Ng3 Ra3 23.Rf3 c4 24.Ra3 Qa3 25.Nb1? Qa5?? 26.Nd2 Qc7 27.e5 Bc5?? 28.ef6+/– Bg1 29.h3?? Bd4–+ 30.Rb1 Ne3 31.Qc1 Qf4 32.Ndf1 Qf2 33.Qd2 Nf1 34.Qf2 Bf2 35.Nf1 Re1 36.Re1 Be1 37.fg7 Bf2 (38.Nd2 c3–+; < 37...Kg7 38.Kg1–+) 0–1. Geisensetter,Kurt – Kahn, corr, 1985.

5.e3 e6 6.a4 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.a4).

3.b5 Bg4

4.Nf3 e6 5.h3 Bh5 6.g4 Bg6 7.Bg2 c6 8.a4 Bc5 9.0–0 h5 10.Ne5 hg4–/+ 11.Ng6 fg6–+ 12.hg4?? Ng4 13.e3 Qd6 14.f4 Nf6?? 15.Bf6 gf6–+ 16.d4 Bb6 17.Qg4 Kf7 18.Na3 Nd7 19.c4 dc4 20.Nc4 Qe7 21.Nb6 Nb6= 22.bc6 bc6 23.Bc6 Rac8 24.d5?? ed5–+ 25.Bd5 Nd5 26.Qf3 Ne3 27.Rfe1 Rc3 28.a5?? Qc5 29.Qf2 g5 30.f5 g4 31.Rab1 g3 32.Qg3 Nf5 33.Qf2 (33...Rg3 34.Kf1 Rh1 35.Qg1 Rhg1 36.Ke2 Qc2#; 33.Re3 Ng3 34.Rb7 Kg6 35.Kf2 Qe3 36.Kg2 Rc2#). stoker – arfknight, Live Game Caissa's Web, 2005.

4.h3 Bd7 5.e3 a6 =+.

4.h3 Bf5

5.Nf3 =+.

5.g4 Bg6 1–0. Gross – Suess, corr 1986.

4.h3 Bh5

5.a4 Nbd7 6.f4 e6 7.d3 (7.g4 Bg6 8.e3 Bc5–/+) 7...Bb4–/+ 8.c3 Bc5 9.g4 Bg6 10.Nf3 (10.Bg2 Be3–/+) 10...Be3 11.Bc1 Bc1 12.Qc1 a6 13.ba6 Ra6 14.Qe3 (14.g5 Nh5+=) 14...0–0 (14...Nb6 15.f5 d4 16.Nd4+/–) 15.Nh4 (15.g5 Nh5+=) 15...b5 (15...c5 16.Ng6 fg6 17.Bg2+=) 16.Ng6 (16.g5 Nh5 17.a5 c5+=) 16...hg6 (16...fg6 17.g5 Nh5 18.Na3 ba4 19.Bg2 Nf4 20.Qg3–+) 17.g5= Nh5 18.Qc1? (18.a5!?=) 18...Qa8 (18...Ng3 19.Rg1 Nf1 20.Rf1 ba4 21.Na3–/+) 19.Bg2–/+ Ra4 (19...Ng3!? 20.Rh2 Ra4 21.Ra4 ba4–/+) 20.Ra4+= Qa4 21.0–0 (21.e3 Ng3 22.Rg1 Nf5–/+) 21...Ng3 22.Re1 Qa2 (22...Qa7 23.e3–/+) 23.Kf2 (23.Qe3 Nf5 24.Qf3 Qa7 25.Qf2 Ne3–/+) 23...Nh5 (23...Nf5 24.Qd2 Qa7 25.e3–/+) 24.Rd1 (24.Qe3 Ra8–/+) 24...f6 (24...Ra8 25.Ke1–/+) 25.Bf3 (25.Ke1 e5 26.Qa3 Qa3 27.Bd5 Kh7 28.Na3 Nf4=) 25...fg5 26.fg5 Nf4 27.Rd2 (27.Qe3!?–/+) 27...Qa7–+ (27...Nh3 28.Kg3 Rf3 29.ef3+–) 28.Kg3 Qe3 29.Qe1?? (29.Qc2 Qg1 30.Kh4 Qf2 31.Kg4 Ne5) 29...Nh3! 30.Kh3 Deflection from f3 30...Rf3! Eliminates the defender f3 31.Kg2 (31.ef3 A pinning theme 31...Qe1) 31...Rf5 32.Qg3 Rg5 (32...Rg5 33.Qg5 Qg5 34.Kh3 e5–+) 0–1. Cane,Luisito – Kern,Manfred, corr 3GMM–57, 1996.

5.d3 e6 6.Nc3 Bb4–/+ 7.a3 Ba5 8.d4 c5! 9.Qd3 Bg6 10.Qd2?? Ne4 11.Qe3 cd4 12.Qd4 Qb6 13.Qb6 ab6 (13...Bb6?! 14.Ne4 Be4 15.f3=). amikhlin (2385) – chadpalmer (2345), net–chess.com, 2004.

5.Nf3 Bf3 6.ef3 e6 =.

5.g4 Bg6=+ 6.Nf3 a6 7.a4 e6 8.Bg2 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.0–0 h5 12.g5= Ne4 13.h4 Qa8 14.Nc3 Qa5 15.Bb2 Bc5 16.Qa1= 0–0?? 17.Qa5+– (17...Bb6 18.Qa1+–) 1–0. Mehlhorn,Uwe – Zattera, ECC5.038, 2003.

5.g4 Bg6 6.Nf3 e6 7.Bg2 Be4 (7...a6 8.Nc3=+) 8.d3 (8.Nc3 Bf3 9.Bf3 Bb4=) 8...Bf3=+ 9.Bf3 Qd7 (9...a6!?=+) 10.c4+= Bb4 11.Nd2 d4?? (Better is 11...0–0+=) 12.Bb7+– a6 13.Ba8 ab5 14.a3 Bc5 15.g5 Nh5 16.cb5 Qb5 17.Qb3 Qb3 18.Nb3 Be7 19.Rc1 Bd6 20.Bd4 0–0 21.a4 Bb4 22.Bc3 Ba3 23.Ra1 1–0. Taulien,Hans_Juergen – Steingraeber,Barbara, remoteschach.de, 2002.

5.Nf3 Nbd7

6.e3 c6

7.a4 Qc7

8.c4 e5+= 9.Be2 (9.cd5 Nd5 (9...cd5 10.g4 Bg6 11.Nc3 Qd6 12.Nh4 Ne4=) 10.g4 Bg6 11.Nc3 Nb4 12.Rc1 e4–/+; 9.Nc3 e4 10.g4 Ng4 11.hg4 Bg4 12.Be2 ef3–+; 9.g4 Bg6 10.Nc3 dc4 11.g5 Ne4 12.Bc4 Rd8+=) 9...dc4 (9...e4 10.bc6 bc6 11.Ng1 Be2 12.Ne2 dc4–/+) 10.Na3 (10.Bc4 e4 11.g4 ef3 12.bc6 bc6 13.gh5 Ne5+=; 10.g4 Bg6 11.Bc4 Bd6 12.bc6 Qc6+=) 10...Be7 (10...e4!? 11.bc6 bc6–/+ (worse is 11...ef3 12.cd7 Nd7 13.Nb5+=; worse is 11...Qc6 12.Nd4 Be2 13.Qe2–/+; 11...Nc5 12.Nb5 Qe7–/+) 12.Nd4 Be2–/+; 10...Bf3 11.gf3 Ba3 12.Ra3 cb5–/+) 11.Nc4 (11.bc6 bc6 12.Nc4 e4+=) 11...e4 12.Ng5? (better is 12.bc6!? bc6+= (12...Qc6 13.Nd4 Be2 14.Qe2=)) 12...Be2–/+ 13.Qe2 h6 14.Nf7 (14.Ne4!? Ne4 15.Bg7–+) 14...Kf7 15.0–0 Rhe8 16.f3 Kg8 17.f4 (17.fe4 Ne4 18.d3 Nef6–+) 17...Rac8 18.Ne5 Bd6 19.Qc4 Kh8 20.Qf7?! (20.d4–+) 20…Ne5 (20...Ne5 21.Qc7 Rc7 22.Be5 Be5 23.fe5 Re5–+) 0–1. Gross,Wilhelm – Merten,Rainer, xvii/07, corr Germany, 1988.

8.bc6 bc6 A) 9.Nc3 Rb8 (9...e5+= 10.g4 Bg6 11.Nh4 Bb4 12.Ng6 hg6+= 13.Na2+=) 10.Rb1 A1) 10...Bf3 11.Qf3 e5 (11...Nc5 12.Bd3 Nd3 13.cd3+=) 12.Be2 Ne4 (12...Rb4+= 13.Ba1+=) 13.Ne4+=; A2) 10...e5 11.g4 Bg6 12.Bg2 Bb4 13.Nh4–/+; B) 9.g4 Bg6 10.g5 (10.Ra2 e5 11.g5 Ne4 12.d3 Qa5 13.Nbd2–/+) 10...Rb8 11.Ra2 Ne4 12.d3 Qa5 13.c3+=; C) 9.d4 Rb8 (9...Bf3 10.Qf3 Rb8 11.Ra2 e5 12.de5 Ne4 13.Bd3+=) 10.Ra2 (10.Ba3 Bf3 11.gf3 e5 12.Bf8 Nf8 13.de5–/+) 10...e6 11.Bd3 c5 12.dc5 Bc5 13.0–0+=; D) 9.Be2 Rb8 (9...Bf3 10.Bf3 Rb8 11.Bf6 Nf6 12.c4 e5 13.cd5+=) 10.Bf6 (10.Ra2 e5 11.g4 Bg6 12.Nh4 Bb4 13.Ng6–/+) 10...Nf6 11.c4 e5 12.cd5 e4 13.Nd4+=; E) 9.Bf6 Nf6 10.d4 e6 11.Bd3 Bb4 (11...Rb8 12.0–0 Bd6 13.c4+=) 12.c3 Bd6+= 13.Nbd2+=.

8.g4 Bg6 9.Nc3 A) 9...e5 10.Nh4 (10.bc6 bc6 11.Nh4 Rb8 12.Rb1 Bb4 13.Na2+=) 10...Bb4 11.Ng6 hg6 12.h4 (12.Rb1 g5 13.Na2+=) 12...Nc5+= 13.f3+=; B) 9...Rd8 10.Nh4 e5 11.Ng6 hg6 12.bc6 bc6+= 13.Rb1+=; C) 9...Rc8 C1) 10.Rb1 C11) 10...Ne4 11.bc6 bc6 12.d3 Nec5 (12...Nc3= 13.Bc3=) 13.h4=; C12) 10...e5 11.bc6 bc6 12.Nh4 Rb8 13.Ng6+=; C2) 10.Nh4 Be4 11.Ne4 Ne4 12.Nf5 e5 13.bc6+=; D) 9...e6 10.Rb1 (10.a5 cb5 11.g5 Ne4 12.Nb5 Qd8 13.a6=; 10.Nh4 Be4 11.Ne4 Ne4 12.Nf3 e5 13.c4=; 10.bc6 bc6 11.Rb1 Rb8 12.Bg2 Ne4 13.Nh4+=; 10.Ra2 Ne4 11.a5 e5 12.a6 Rb8 13.Nh4+=) 10...Rb8 11.Nh4 Be4 12.Nf3 h6= 13.Ne4=; E) 9...Ne4 10.Ne4 (10.Rb1 e5 11.bc6 bc6 12.d3 Nc3 13.Bc3+=) 10...Be4 11.d3 Qa5 12.c3 Bf3+= 13.Qf3+=.

8.g4 Bg6 9.d3 A) 9...e5 10.g5 (10.bc6 bc6 11.g5 Ng8 12.Nbd2 h6 13.gh6+=) 10...Ng8 11.Nh4 Be7 12.Rg1 a6 13.Nd2=; B) 9...h6 10.Bg2 (10.Nbd2 e5 11.c4 dc4 12.bc6 bc6 13.Nc4+=; 10.Nh4 Bh7 11.Bg2 e5 12.0–0 Bd6 13.Nf5+=; 10.bc6 bc6 11.Nc3 e5 12.Ba3 Ba3 13.Ra3–/+; 10.c4 dc4 11.dc4 e5 12.Nbd2 Bb4 13.Bg2–/+) 10...e5 11.0–0 Rd8 12.Nh4 Bh7 13.f4+=.

8.g4 Bg6 9.g5 A) 9...Nh5 10.Be2 (10.Nh4 e6 11.Ng6 hg6 12.a5 Be7 13.Rg1=; 10.bc6 bc6 11.Be2 Rb8 12.Bc3 h6 13.h4=; 10.Rg1 cb5 11.Nc3 b4 12.Nb5 Qb8 13.Nh4+=) 10...h6 11.bc6 bc6 12.h4 Rb8= 13.Bc3=; B) 9...Ne4 10.d3 (10.bc6 bc6 11.d3 Rb8 12.Ra2 Qa5 13.c3+=) 10...Qa5 11.c3 Nec5 12.d4 Ne4+= 13.Nbd2+=.

3.b5 g6

4.e3 a6 5.Bf6 ef6 6.Nf3 =.

4.e3 c5 5.Nf3 (5.Bf6 ef6 6.Be2 Bd6=) 5...Bg7 6.c4 dc4 (6...0–0 7.cd5 Qd5 8.Nc3=) 7.Bc4 0–0 8.d4 Ne4 9.0–0 Bg4 10.h3 Bf3 11.Qf3+= Nd6 12.Bd5 Nd7 13.a4 Rb8 14.Nd2 cd4 15.ed4 Nb6 16.Rfd1 Nd5 17.Qd5 Nf5 18.Qd8 Rfd8=+ 19.Nf3 Rbc8 20.g4 Nd6 21.Ne5 Nc4=+ 22.Nc4 Rc4 23.Rdc1 Rdc8 24.Rc4 Rc4 25.a5 Rb4–/+ 26.Ba3 Rb5 27.Be7 f5 28.Ra4= Kf7 29.Bc5+= a6 30.gf5 gf5 31.Kg2 Ke6 32.Bb6 Kd5 33.Kg3 Bh6 34.Ra2 Rb3 35.Kg2 Bg7=+ 36.Rc2 Bd4 37.Rd2 Rb4 38.Kf3 Ke5 39.Bd4 Rd4 40.Rd4 Kd4 41.Kf4 Kc5 42.Kf5 b5 43.ab6 Kb6 44.Ke6 a5= 45.f4 a4 46.f5 a3 47.f6 a2 48.f7 a1Q 49.f8Q Qe1 50.Kf6 Qc3=+ 51.Kg5 Qg3 52.Kf6 Qh3 53.Qd6 Kb5 54.Qd5 Kb4 55.Qd4 ½–½. Kaszynski,B – Skaruz,J, Ustrzyki Dolne op, 1996.

4.e3 Bg7

5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0–0 5.Nf3 d5).

5.Nf3 a6 6.a4 =.

5.g3 0–0 6.Bg2 c6 7.a4 b6 (7...Bd7 8.Ne2=+) 8.Ne2 Qd6 9.0–0 Bb7 (9...a6 10.d3=) 10.Nbc3 e5 (10...a6 11.f4=) 11.d3 Nfd7 12.Ba3 c5= 13.d4 e4? 14.dc5+/– Nc5 15.Ne4! Qd7? 16.Nc5+– bc5 17.Bc5 Ba1 18.Qa1 f6?? 19.Bf8 Kf8 20.Qf6 Qf7 21.Qh8 Ke7 22.Bh3 h5 23.Nf4 Nd7 24.Qd4 Nf6 25.Be6 Qg7 26.Nd5 Ke6 27.Nc7?? Kf7?? 28.Qc4 Kf8 29.Na8 Ba8 30.Qc8 Ne8 31.Qa8 Qe5 32.f4 Qc7 33.f5 gf5 34.Rf5 Ke7 35.Qe4 Kd8 36.Rd5 Nd6 37.Qd4 Kd7 38.Rd6 Qd6 39.Qa7 Ke6 (40.Qa6 Qa6 41.ba6 Kd7+–; 39...Ke8 40.Qa8 Kf7 41.Qf3 Kg7+–). MasterofDisaster – Bennyhill, Caissa's Web, 2004.

3.Nc3 e5–/+

4.d4 ed4 5.Qd4 Nc6 6.Qh4 Nb4 7.0–0–0 –+.

4.a3 d4

5.Na4 b5 –/+.

5.Na4 Bd7 6.Nc5 Bc5 7.bc5 Qe7 8.e3 Qc5 9.ed4 ed4 10.Bd4?? (Better is 10.Nf3 Nc6 11.Qe2 Kd8 12.Qc4 Re8 13.Kd1 Qc4 14.Bc4–/+) 10...Qd4–+ 11.Ne2 Qd5 12.c4 Qc5 13.Qb3 b6 14.Qg3 0–0 15.Qe3 Nc6 16.Qc5 bc5 17.d3 Ne5 18.Ng3 Rfe8 19.0–0–0 Neg4 20.Rd2 Re1 21.Kc2 Ba4 22.Kc3 Rb1 23.h3 Rb3 24.Kc2 Ne5 25.Kc1 Ra3 26.Rh2 Rb8 27.Rc2 Bc2 28.Kc2 Ra2 29.Kc1 Rf2 30.Be2 Nc4! 31.dc4 Rb3 32.Nh5 Re2 33.Nf6 gf6 34.h4 Rbb2 35.h5 Rg2 36.Rg2 Rg2 37.Kd1 Rg4 38.Kd2 Rc4 39.h6 Rh4 40.Kc3 Kf8 41.Kb3 Ke7 42.Kc3 Kd6 43.Kd3 Kd5 44.Kd2 Rh6 45.Kc1 Rh2 46.Kb1 c4 47.Kc1 c3 48.Kb1 c5 49.Kc1 f5 50.Kb1 f4 51.Kc1 f3 52.Kd1 f2 53.Kc2 Kc4 54.Kc1 f1Q 0–1. BigLion_02 – Tgiant, computer chess game, 2002.

4.d4 Bb4

5.de5 d4 6.ef6 Qf6 7.Nf3 dc3 8.Bc1 –/+.

5.Nf3? Nc6 (6.Ne5 Ne4–/+; better is 5...Ne4!? 6.Qd3 c5–+) 0–1. cole baker – Fabbri (1695), internet, 2005.

3.d3 e6

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.d3).

4.b5 a6 5.e4 de4–/+ 6.c4 Bb4 7.Bc3 Bc5 8.d4 Be7 9.a4 c5 10.d5 (10.a5 0–0–/+) 10...ed5 11.cd5 Qd5 12.Qd5 Nd5 13.Bg7 Rg8 14.Bb2 Nb4 15.Kd1 Nd3 16.Bd3 ed3 17.g3 Bg4 18.f3 Be6 19.Nd2 c4 20.Rc1 ab5 21.ab5 Rg5 22.Nc4 Ra2 23.Kd2 (23.Bd4–+) 23...Rb5 24.Kd3 Bc4 (24...Rab2?! 25.Nb2 Rb2 26.Ne2–+; 24...Rbb2?! 25.Nb2 Rb2 26.Ne2–+) 25.Rc4 Rbb2 26.Nh3 Nc6 27.Re1 f5 (worse is 27...Rh2 28.Nf4 Ra3 29.Rc3 Nb4 30.Kd4 Nc2 31.Rc2 Rc2 32.Re5 Rf3 33.Nd5 Rd2 34.Kc4 Rd5 35.Rd5 Rg3 36.Rb5–+) 28.Rcc1 Ra3 29.Rc3 Nb4 0–1. Slupski,Mark – Clark,Stephen L (1965), BCCA/2011/CanF (ENG), 2011.

4.b5 c6 5.a4 Bb4 6.Nd2 cb5 7.c3 Bd6 8.ab5 Bd7 (8...0–0 9.Ngf3+=) 9.c4= dc4 10.dc4 e5 11.Ngf3 Qe7 12.e3 0–0 13.Be2 a5 14.c5 Bc5 15.Ne5 Be6 16.0–0 Nbd7 17.Nef3 (17.Nd7 Nd7 (worse is 17...Bd7 18.Bf6 gf6 19.Bd3+/–) 18.Bd3 Bb4=) 17...b6 (17...Bb4 18.Nd4=) 18.Nb3 Rfd8 (18...a4 19.Nc5 Nc5 20.Nd4=) 19.Nbd4+= Bd4 20.Nd4 Nb8 (20...Bd5 21.Nc6 Bc6 22.bc6+=) 21.Qb1 Bd5 22.Nf5 Qe8? (22...Qe6!? 23.f3 g6 24.Nh6 Kf8+/–) 23.Bf6 (23.Ng7 Qe4 24.Qe4 Ne4+– (24...Be4?? 25.Bf6 Rd5 26.Nh5+–)) 23...gf6 24.Ra4 (better is 24.Rd1 Rd7 25.Ra4+–) 24...Qf8?? (better is 24...Nd7+/–) 25.Rh4+– Nd7 (25...Qe8 26.Rd1 Qe5+–) 26.Ne7!! Qe7 27.Qh7 Kf8 28.Qh8# 1–0. Riveline,Maurice – Duval,L, FRA–ch op Seniors, 1998.

4.b5 Qd6 5.a4 a6 6.Nd2 ab5 7.ab5 Ra1 8.Qa1 Be7 (8...Nbd7!?=) 9.Qa8+= Nfd7 10.Bg7 Rg8 11.Ba1 Nb6?? (11...c6 12.Qa4+=) 12.Qa2?? (12.Qb8 Qa3 13.Nb3+–) 12...e5 Black intends d4 13.Ngf3 d4 14.e3 de3 15.fe3 Qh6 16.Be5 Qe3 17.Kd1 Be6 18.Qa7 N8d7 19.Bd4 Qf4 20.c4 Rg6 (20...Bc5!? 21.Bc5 Nc5 22.d4+–) 21.Qb7 Bg4 22.Kc2 Re6 23.Nb3 f6 (23...Bf6 24.Bf6 Rf6 25.Nbd4+–) 24.Rg1 Kf7 25.h3 c5? 26.bc6 Bf3 27.gf3 Qf3 28.Bb6 Nb6 29.Qb6 Rc6 30.Qa7 Qf5 31.Nd4 Qf2 32.Be2 Qg1 33.Bh5 Kg8 34.Qe7 Rc4 35.dc4 Qf2 36.Kb3 Qg3 37.Ka4 (37.Ka4 h6 38.Nf5 Qg5 39.Qf7 Kh8 40.Bg6 Qg6 41.Qg6 h5 42.Qg7 mate) 1–0. Trokenheim,Marek (1765) – Couspeyre,Thierry, OP–2012–0–02228, 2012.

4.Nd2 Bb4–/+ 5.g3 Nc6 6.Bg2 e5 7.e4 d4 8.Ne2 Qe7 9.0–0 Bg4 10.f3 Bh5 11.c3?? (better is 11.a3 Bd6 12.f4–/+) 11...Bd6 (better is 11...dc3 12.Nc3 Bc3 13.Bc3 Qc5 14.d4 Qc3–+) 12.cd4+= 0–0–0 (12...ed4!? 13.Rb1 Rd8+=) 13.d5+= Nd4 (13...Nb8!?+=) 14.Nd4+/– ed4 15.Bd4 h6 16.Qa4 Bc5 17.Bc5 Qc5 18.Kh1 g5 (18...a6 19.Rab1 Qa7 20.Nc4+–) 19.Rfc1 g4?? (better is 19...Qf2 20.Rc2 a6+–) 20.Rc5 gf3 21.Bf3 Bg6 22.Rac1 Ne8 23.Qa7 b6 24.Rc7 Nc7 25.Qc7# 1–0. Salvatore – pieeater, ChessWorld.net, 2012.

3.d3 Bf5

4.a3 e6 =+.

4.c4 c6 5.Nd2 e6 6.a3 Be7 7.Ngf3 0–0 8.h3 h6 9.g4 Bh7 10.c5 Nfd7 11.Nd4 e5 12.N4f3 Bf6 13.Qb3 e4 14.g5 (better is 14.Nd4!?+=) 14...Bb2–+ 15.Qb2 ef3 16.gh6 Qf6 (16...gh6!? 17.Nf3 Bg6–+) 17.Qf6–/+ Nf6 18.Rg1 (18.hg7 Kg7 19.Nf3 Nbd7+=) 18...Bg6 (18...fe2 19.Rg7 Kh8 20.Be2–+) 19.Nf3 (better is 19.hg7!? Kg7 20.Nf3+=) 19...gh6–+ 20.Nh4 Kh7 21.Kd2 Nbd7 22.e3 Rg8 23.Be2 Bh5 24.Nf5 Be2 25.Ke2 Rg1 26.Rg1 Ne8 27.f4 a5 28.Rb1 ab4 29.Rb4? Nc5 30.d4 Nd7 31.Rb7 Nef6 32.Rc7 Ra3 33.Rc6 Kg6 34.Ne7 Kh5 35.Rd6 Ra2 36.Kd1 Kh4 37.Nd5–/+ Nd5 38.Rd5 Ra7 39.Rd6 h5 40.Rh6 Ra5 41.Rd6 Ra7 42.Rd5?? Nf6–+ 43.Re5 Kh3 ½–½. Cohen Solal,Lennie – Gabriel,Florent (1690), FRA–chT U20, 2004.

4.Nd2 Nbd7 5.Ngf3 =+.

4.Nd2 e6 5.a3 Bd6 6.e4 de4 7.Bf6 Qf6=+ 8.de4 Bg6 9.Ngf3 Nc6 10.Bb5 0–0 11.0–0 Ne5=+ 12.Re1 Nf3 13.Nf3=+ Be5 14.Ne5= Qe5 15.Bd3 Rfd8 16.Qf3 a6 17.Qe3 b5 18.f4+= Qd4 19.Kf2 Qe3 20.Ke3+= f5 21.e5+/– c6 22.Rac1 Bh5 23.c4 Kf8 24.cb5 ab5 25.Rc3 Ra7 26.Ra1 h6? 27.Rc6+– Bf7 28.Bb5 Rd5 29.a4 Rb5+= 30.ab5 Ra1 31.b6 Ra8 32.b7 Rb8 33.Rc8 (33...Ke7 34.Rb8+–) 1–0. foresight – StefanLaasch, internet, 2007.

4.g3 Nbd7 5.Bg2 (5.Bh3 Bh3 6.Nh3 e5–/+) 5...e5–/+ 6.a3 a5 7.b5 Bc5 8.Nf3 0–0 9.0–0 Qe7 10.Nbd2 e4 11.Nd4 Bg6 12.N2b3 Bd6 13.a4 Ne5 14.Qd2 Neg4 15.Bc1 Rfe8 16.Bh3 Qd8 17.e3 ed3 18.cd3 Ne5 19.Na5–/+ c5 20.Nb7 cd4 21.Nd8 Nf3 22.Kh1 Nd2 23.Bd2 Red8 24.ed4 Bd3 25.Rfc1 Ne4 26.Be1 Rdb8 27.Bd7 Ra7 28.Bc6=+ Nf6 29.Bd2 h6 30.f3 Bc4 31.Rcb1 Bd3 32.Rb2 Rc7=+ 33.Bc1 ½–½. Hoyos,Astrid – Sheldon,Ruth (2095), Wch U20 Girls, 1994.

4.g3 e5 5.Be5 Bb4 6.c3 =+.

4.Nf3 e6

5.b5 Bc5 6.e3 Nbd7 7.Be2 a6 8.d4 Bb6 (8...Bd6 9.ba6 ba6 10.c4+=) 9.ba6= ba6 10.c4 c6 11.Nc3 0–0 12.0–0 a5 13.a4 (13.Nh4 Be4+=) 13...Qc7 (13...dc4 14.Bc4 Bc7 15.Bd3+=) 14.cd5 (14.Nh4 Rab8+/–) 14...cd5 (14...ed5 15.Ba3 Rfe8 16.Rc1+=) 15.Nb5 (15.Nh4+/–) 15...Qd8? (better is 15...Qc2!? 16.Ba3 Rfc8+=) 16.Ba3+– Re8 17.Nd6 Rf8 (better is 17...Ne4!? 18.Ne8 Nc3+–) 18.Nf5 ef5 19.Bf8 Qf8 20.Bb5 Qd6 21.Rc1 g6 (21...f4 22.Rc6 Qb8 23.Qd3+–) 22.Rc6 Qe7 23.Ne5! Ne5 (23...Bd8 24.Nd7 Nd7 25.Qf3+–) 24.Rb6 (24.de5 Ng4 25.Rb6 Qe5+–) 24...Qc7 (24...Neg4 25.Qc2 Ne4+–) 25.Rf6 (better is 25.de5 Qb6 26.ef6 Qf6 27.Qd5+–) 25...Ng4+/– 26.g3 (better is 26.Rg6! fg6 27.g3+/–) 26...Nf6+= 27.Qc1 Rc8 28.Qc7 Rc7 29.Kg2 Ne4 30.h3 Nc3 31.h4 Rb7 32.Bc6 Rb6 33.Bd7 Rb4 Attacking the isolated pawn on a4 34.Rc1 Na4 35.Rc8 Kg7 36.Ba4 Ra4 37.Ra8 Kf6 38.Ra6 Ke7 39.Kf3 Kd8 40.Kf4 Kc7 41.Ra7 Kb6 42.Rf7 Ra1 43.f3 a4+/– 44.Rf8 a3= 45.Ra8 a2 46.Ke5 Kc6 47.Ra3 ½–½. Wich,Manuela – Sancar,Kenan, Karl Mala mem op, 2004.

5.Qd2 Na6 6.a3 Bd6 =+.

5.Qd2 Bd6 =+.

5.Nbd2 Bb4–/+ 6.g3 0–0 7.Bg2 Qd6 8.0–0 Nc6 9.Bf6 gf6 10.Nh4 Bg4 11.h3 Bh5 12.Kh2 Bc3 13.Ndf3? Ba1–+ 14.Qa1 Kg7 (15.Rb1 Rab8–+; 14...Ne5 15.Rb1–+) 0–1. mferzman – marekt, ChessWorld.net, 2008.

3.d4 e6

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.d4).

4.Nc3 Bb4 5.e3 Ne4 6.Nge2 Qh4 7.g3 Qf6 8.f4 Nd6 (8...0–0 9.a3 Ba5 10.Bg2–+) 9.a3 (9.Nc1 c5–+) 9...Ba5 10.Bg2 (10.Nc1 Ne4 11.N1a2 c5–+) 10...Nc4 (10...0–0 11.Rb1–+) 11.Qc1 (11.Bc1 c5–+) 11...c5 12.0–0 cd4 13.ed4 (13.Nd4 Nc6 14.Ncb5 Nb2 15.Qb2 0–0–+) 13...g6 (13...Nc6 14.f5 Nd4 15.fe6 Ne2 16.Ne2 Qe6 17.Bg7–/+) 14.Nb5 (14.Nb1 Nc6–+) 14...Bd7 15.Nbc3 Nc6 16.Bh3 (better is 16.Nd1–+) 16…Nd4 (17.Rb1 Bb6–+) 0–1. islanderfan (1670) – pierred (1800), net–chess.com, 2006.

4.e3 Bd6 5.a3 Nbd7 6.Bd3 0–0 7.Nf3 a5 8.c3 e5 9.de5 Ne5 10.Ne5 Be5 11.Nd2 Re8 12.Be2 ab4 13.ab4 Ra1 14.Qa1 Ne4 15.Ne4 de4 16.0–0 Qh4 17.g3 Qf6 18.Rb1 Rd8 19.Rd1 Re8 20.Rd2 Qe7 21.Qd1 Bf5 22.c4 Bb2 (22...Qb4? 23.Rd8 Qe7 24.Re8 Qe8 25.Be5+–) 23.Rb2 Rd8 24.Rd2 Ra8 25.Qb3 b6 26.b5 h6 27.Qc3 Ra3 28.Qc2 ½–½. pascals1975 – byron_de (2170), ChessWorld.net, 2003.

4.Nf3 Bb4 5.c3 Bd6 6.Ba3 –/+.

4.Nf3 Bd6 5.e3 0–0 (5...Bb4 6.c3 Bd6 7.Ba3–/+) 6.c3 Nbd7 7.Bd3 c6 8.Qc2 Ng4 (8...a5 9.a3=+) 9.h4 (better is 9.Bh7!? Kh8 10.Bd3+/–) 9...Ndf6 10.Ng5 g6 11.h5 Nh5 (better is 11...h6 12.Nf3 g5=) 12.Rh5 (better is 12.Nh7 Kh7 13.Rh5 Kg7 14.Rh1=) 12...gh5–+ 13.Bh7? (13.Nh7 Re8 14.e4 de4 15.Be4–+) 13...Kh8 (better is 13...Kg7 14.Nh3 f5 15.Bf5 ef5–+) 14.Bg8+= f5 (14...Rg8 15.Qh7) 15.Nf7 Rf7 16.Bf7 Qg5 (better is 16...Qh4 17.g3 Qh2=) 17.Qd3?? (17.Bc1 Nf6 18.g3 Qg7 19.Bh5 Nh5–+) 17...Nh2?? (17...Kg7 18.Be8–+) 18.Nd2 (18.Qe2 Qg2 19.Qh5 Kg7=) 18...Qg2?? (18...Kg7!? 19.Be8 Kf8 20.Bh5 Qh5–+) 19.0–0–0 (19.Bh5!? Ng4 20.Bg4 Qg1 21.Ke2 Qg4 22.Nf3+=) 19...Ng4 20.Rf1 (20.f3!? Nf2 21.Qe2=+) 20...h4–/+ (20...Nf2 21.Qe2 Bg3 22.Qh5 Kg7 23.Qg6 Kf8 24.Ba3+=) 21.Qe2 h3 22.Qd1? (22.Qe1!?–/+) 22...h2 (better is 22...Nf2 23.Qh5 Kg7 24.Rf2 Qf2 25.Qg6 Kf8 26.Be6 Ke7 27.Bc8 Rc8 28.Qh7 Kd8 29.Qh3 Kc7–+) 23.f4?? (better is 23.Bg6–+) 23...Kg7 (23...Ne3?! 24.Qh5 Kg7 25.Re1–+) 24.Bh5 (24.Re1 Kf7 25.Rh1 Ne3 26.Qh5 Kg7 27.Rh2 Qg1 28.Nf1 Qf1 (28...Nf1?? 29.Qh8 Kf7 30.Rh7 Qg7 31.Rg7 Kf6 32.Qh6) 29.Kd2 Qd1 (29...Qf4?! 30.Qh8 Kg6 31.Qh7 Kf6 32.Qh8 Kg6 33.Qh7 Kf6 34.Qh8 Kg6=) 30.Qd1 Nd1 31.Kd1 Bf4–+) 24...Ne3 25.Bf3 Qh3 26.Rg1 hg1Q (26...Kh7 27.Qe1 hg1Q 28.Qg1 Bf4 29.Ba3–+) 27.Qg1 Ng4 28.Kb1 (28.Be2 Bf4 29.c4 Qe3 30.Qe3 Ne3–+) 28...Bf4 29.Bg4 fg4 30.Bc1 (30.Nb3 e5–+) 30...Qd3 31.Kb2 Bd2 32.Bd2 (32.Qg4 Kf8 33.Bd2 Qd2 34.Kb3 a5 35.Qf3 Ke7–+) 32...Qd2 33.Kb3 e5 34.Qg3 Bf5 35.Qe5 Kg6 36.Qd6 Kh5 37.Qe7 Qc2 38.Ka3 Qc3 39.Ka4 Bc2 40.Ka5 Qa3# 0–1. Fritz,Marco – Taulien,Hans_Juergen, remoteschach.de, 2001.

4.c3 Bd6

5.e3 Ne4 6.a3 Bd7 7.Nd2 Nd2 8.Qd2 0–0 9.Nf3 Be7 (9...a5 10.Bd3=) 10.Ne5 Be8 11.c4 c6 (11...a5 12.Bd3=) 12.c5 f6 13.Nf3 Bh5 14.Be2 a5 15.a4 (15.0–0 Bg6+=) 15...ab4 16.Qb4 Qd7 (16...Nd7 17.Qc3=) 17.a5 Na6 18.Qd2 Bf3 19.Bf3 e5 20.de5 (20.0–0 f5+=) 20...Bc5 21.0–0 fe5 22.Be5 Qf5 (22...Qe7 23.Bf4=) 23.Qb2+= Qg6 (23...Rf7 24.Rfc1+=) 24.Kh1 (24.Qb7 Ra7 25.Qb1 Qe6+/–) 24...Nb4 (24...Bd6 25.Bd6 Qd6 26.Rfc1= (26.Qb7? Rfb8 27.Qb6 Rb6 28.ab6 Qb8–+)) 25.Qc3 (25.Bc3 Nd3 26.Qb7 Ra7+=) 25...Be7 (better is 25...Nd3 26.Bg7 Bb4=+) 26.Rfe1?? (better is 26.Rab1!? c5 27.Rbd1+=) 26...Nd3 (26...Nc2 27.e4 Na1 28.Ra1 de4 29.Qc4 Qf7 30.Qe4–+) 27.Rf1 Ne5 28.Qe5 Bf6 29.Qe6 Kh8 30.Rad1 Ra5–/+ 31.e4 de4 32.Be4–/+ Qg5 33.f4 Qh5 34.g4 Qh3 35.Bg2 Qa3 36.Rd7 Qb4 37.Rfd1 h6?? 38.Be4 Ra1 39.Ra1= Ba1 40.Qg6 Qe1 41.Kg2 Qe2 42.Kg3 Qe3 43.Kg2 Qe2 ½–½. pinski – ahmed sharkawy_1, ChessWorld.net, 2005.

5.Nf3 Nbd7 6.e3 0–0 7.Bd3 =+.

5.Nf3 Nbd7 6.e3 e5 7.de5 Ne5 8.Nbd2 Qe7 (8...a5 9.b5=+) 9.Be2 0–0 10.Qc2 (10.0–0 Bg4=+) 10...Bg4 11.Nd4 (11.0–0 Rfd8=+) 11...Be2–/+ 12.Ne2 Neg4 (12...Rad8 13.0–0=+) 13.h3=+ Ne3 (13...Ne5!?=+) 14.fe3= Qe3 15.Nf1 (15.Qf5 Rae8 16.Qf3 Qg5=) 15...Qg5 16.Rg1 (16.Qd2 Qg2 17.Rg1 Qe4=) 16...Rfe8 (16...Rae8 17.Kd1=) 17.Bc1 (17.Kd1 Ne4 18.Nd4 Qh5 19.Nf3 a5=+) 17...Qh4–/+ (Black gets the initiative) 18.g3 Qh3 19.Be3 a5 20.b5 Ng4 21.Qd3 (21.Bd4 c5 22.bc6 bc6–/+) 21...Re4 22.0–0–0? (22.Kd2 Ne3 23.Ne3=+) 22...Rae8–+ (22...Ne3?! 23.Ne3 Rae8 24.Rh1 Re3 25.Rh3 Rd3 26.Rd3 Re2 27.Rd5 Ra2 28.b6–/+) 23.Qd5 Ne3 24.Ne3 Re3 25.Nf4 Qd7 26.Qb3 a4! 27.Qb2 Qg4 28.Rdf1 Rg3 29.Qf2 Bf4 30.Kb1 Qf5 31.Ka1 Rg1 32.Qg1 Qc2 33.Qc5 Re2 34.Qa3 Be5 35.Rc1 Bc3!? (35...Bc3 36.Qc3 Qa2) 0–1. Rudolf – pierre (2200), internet, 2007.

5.Nf3 Nbd7 6.g3 0–0 7.Bg2 e5 8.e3 (8.de5 Ne5 9.Ne5 Be5=+) 8...e4–/+ 9.Nfd2 Nb6 10.0–0 Bg4 11.f3 ef3 12.Nf3 Qe7 13.Nbd2 (13.Qd3 Nc4 14.Bc1 Qe4 15.Qe4 Ne4–/+ (15...de4?! 16.Ng5=)) 13...Qe3–+ 14.Kh1 Qh6 (14...Ne4 15.Ne4 de4 16.Qe1–+) 15.Bc1 Qh5 16.Kg1 Rae8 17.Bb2 Re3 18.Rf2? Ne4 19.Ne4 de4 20.Qd2 Nc4 21.Qc2 ef3 22.Bf1 Bf5 23.Qc1 Qg4 24.Bc4 Bg3! 25.Qe3?? Bf4 26.Kf1 Be3 27.Bd5 Bd3 28.Ke1 Qg1 29.Rf1 Qf1 0–1. I need chocolate... – michaelbuss, ChessWorld.net, 2005.

4.e3 Bb4–/+

5.c3 Bd6 6.Bb5 (6.Ba3 Nc6–/+) 6...c6 7.Ba4 (7.Bd3 Nbd7–/+) 7...b5 (7...0–0 8.Ba3–+) 8.Bb3 (8.Bc2 Nbd7–/+) 8...0–0 9.Nf3 Nbd7 10.0–0 (10.a4 ba4 11.Ba4 Qb6–/+) 10...Qc7 11.Nbd2 e5 12.de5 Ne5 13.c4 (13.a4 Nc4 14.Nc4 dc4–+) 13...Nf3 (13...dc4 14.Bc2–+) 14.Nf3 bc4 15.Bc2 Bg4 (15...Qe7!? 16.Qd2–+) 16.Bf6 gf6 17.h3 Bh5 18.g4 (18.Rc1 Rab8–+) 18...Bg6 19.Bg6 (19.Qd2 Rab8–+) 19...fg6 20.Nh4 (20.Rb1 Rab8–+) 20...Rab8 21.Qc2 (21.Rc1 Rb2 22.Rc2 Rb6–+) 21...Kg7 (21...Qe7 22.Nf3–+) 22.f4 (22.Nf3 Rb6–+) 22...Rb6 23.Rab1 Rfb8 24.Rb6 Qb6 25.Nf3 (25.Ng2–+) 25...Qe3 26.Kg2 (26.Qf2 Bc5 27.Qe3 Be3 28.Kh1 c3–+) 26...Qf4 (better is 26...c3 27.Re1 Qf4 28.Qf2–+) 27.Qf2 (27.Kh1 Be5 28.Qc1 Qg3 29.Ne5 Qh3 30.Kg1 Qg3 31.Kh1 fe5–+) 27...Be5 (27...c3 28.Kh1 Rb2 29.Qa7 Kg8 30.Qg1–+) 28.Ne5 Qf2 29.Rf2 fe5 30.Kf3 (30.Rc2–+) 30...Rf8 31.Ke2 Rf2 32.Kf2 Kf6 33.Ke3 Ke6 (better is 33...Kg5!? 34.Kf2–+) 34.Kd2 d4 35.a4 e4 36.h4 Kd5 (37.Kd1 c3–+) 0–1. kamera (1605) – tetsy (1705), GameColony.com, 2002.

5.c3 Be7 6.a4 0–0 7.Nf3 Nbd7 (7...c5 8.Ba3–/+) 8.Be2 c5 9.dc5 (9.0–0 c4–/+) 9...Nc5–+ 10.Nbd2 a6 (10...Bd7 11.c4–/+) 11.0–0 Bd7 (11...b6 12.c4–/+) 12.Ne5 (12.c4 b6–/+) 12...Bc6 13.Nc6 bc6 14.Nf3 (14.c4 Qa5–/+) 14...Qb6 15.Ba3 Rfe8 (15...Nfe4 16.Rb1 Qc7 17.Qc2–/+) 16.Ne5 (16.Qc2 Nfe4–/+) 16...Qc7 17.Nf3 Rab8 (17...Nfe4 18.Qc2–/+) 18.Rb1 (18.Bc5 Bc5 19.Ba6 Qa5–/+) 18...a5 (18...Rb1 19.Qb1 Na4 20.Qc2 Ba3 21.Qa4–+) 19.Rb8 Rb8 20.Qc2 Nfe4 21.Nd4 (21.c4 Rb3 22.Bc5 Rc3–/+) 21...e5 (21...Bd6 22.Kh1–/+) 22.Nf3 (22.Nf5 Bf8 23.c4 g6–/+) 22...f6 (better is 22...Rb3 23.Bb2 Qb7–+) 23.Rb1?? (23.c4 Qb7–/+) 23...Rb7 (better is 23...Rb1 24.Qb1 Na4–+) 24.Rb7–/+ Nb7 25.Qb3 (25.Bb2 Bd6–/+) 25...Ba3 26.Qa3 c5 (27.Qb3 c4–/+; 26...Qb6 27.Qe7 Nbd6 28.Bd3–+) 0–1. kamera – ce (1745), GameColony.com, 2002.

5.c3 Be7 6.Nd2 Nc6 7.Ngf3 0–0 8.Bd3 Bd6 9.0–0 e5 10.de5 Ne5 11.Ne5 Be5 12.f4 (12.Qc2 Qe7+=) 12...Bd6–/+ 13.Nf3 Bg4 14.h3 Be6 15.Qc2 Re8 16.Rad1 c6 17.Ng5 g6 (17...h6 18.Nh7 Ne4 19.Be4 de4 A) 20.Qe4?? Bb3 21.Qd4 Bd1–+ (21...Kh7?! 22.ab3 Bf8 23.Qc4=); B) 20.c4 Kh7 21.Be5–+) 18.Ne6 (18.c4!? Bc5 19.Kh1=) 18...Re6–/+ (18...fe6 19.c4 Rf8 20.Bg6+/–) 19.Rf3 Qb6 20.Re1 Rae8 21.Bc1 Nh5 (better is 21...Ne4–+) 22.Bd2?? (better is 22.f5 Rf6 23.fg6 hg6 24.Rf6 Nf6 25.Bg6+=) 22...Bf4 (22...Nf4 23.Bf1 Qc5 24.Qb3–+) 23.g4? (better is 23.Rb1 Qc5 24.Rb7–+) 23...Be3 24.Be3 Re3 25.Rfe3 (25.Ree3 Re3 26.Kg2–+) 25...Re3 26.Qf2 (26.Re3 Qe3 27.Qf2 Qd3 28.gh5 Qc3 29.hg6 hg6 30.Qa7–+) 26...Re1 (26...Re1 27.Bf1 Ng3 28.Qb6 ab6–+ (28...Nf1?! 29.Qb7 Nd2 30.Kf2=; 28...Rf1 29.Kg2 ab6 30.Kg3–+)) 0–1. preethan (2135) – mbarker (2410), net–chess.com, 2015.

5.c3 Be7 6.Nf3 0–0 –/+.

3.d4 Bf5

4.a3 e6 5.e3 Nc6 6.c4 dc4 7.Bc4 Bd6 8.Nf3 Bg4 9.0–0 Bf5 10.Nc3 h6 11.Qb3 0–0 12.Rfc1 Bg4 13.Be2 Bf5 14.Nh4 Bg4 15.f3 Bh5 16.Nb5 Nd5 17.Nd6 cd6 18.g4 (Better is 18.Nf5!+=) 18...Qh4–/+ 19.gh5 Qg5 20.Kf2 Qh4 21.Kg1 Nce7 22.f4 Qh3 23.Bf1 Qg4 24.Bg2? Qh5 25.Re1 Rac8 26.Kf2 Qg6 27.Rg1?? Qc2 28.Kf3 Qb3 29.Bc1 Rc3 30.Bd2 Rc2 31.Rgd1 Qc4 32.Bf1 Qc6 33.Kg3 Qd7 34.Kf3 e5 35.fe5 Qf5 36.Kg3 Qe4 37.Bg2 Nf5 38.Kf2 Qe3 39.Kf1 Rd2 40.Rd2 Qd2 41.Bd5 Ne3 42.Kg1 Nd5 43.Rf1 Qd4 44.Rf2 Rc8 45.Kg2 Nf4 46.Kg3 Rc3 47.Rf3 Rf3 48.Kf3 Qe5 49.Kf2 d5 50.Kf3 d4 51.Kf2 d3 52.Kf3 d2 53.Kf2 d1Q 54.Kg3 Ng6 55.Kf2 Qde2 56.Kg1 Q5h2 0–1. Huib – kool_aid, HCL–B2286 playchess.de, 2003.

4.b5 e6 5.Nd2 c5 6.c4 Qa5 7.a4 dc4 8.Rc1 cd4 9.Rc4 (better is 9.Bd4!? Nbd7 10.Rc4+=) 9...e5–/+ 10.e4? (better is 10.e3!? de3 11.fe3–/+) 10...Be6 11.Rc1 Bb4 (11...Ne4 12.Ngf3 Nd7 13.Bd3–+) 12.f3 (12.Bd3–+) 12...0–0 13.Bc4 Nbd7 14.Ke2 Bd2 15.Qd2 Qa4 16.Be6 fe6 17.Nh3 Qb5 18.Kf2 (18.Ke1–+) 18…Ne4 (18...Ne4 19.Ke1 Nd2 20.Kd2 Qb2 21.Rc2 Qb4 22.Ke2 e4–+) 0–1. Kopec,Jerzy – Prazmowski,Wlodzimierz (1730), Warszawa ch41 opB Poland, 2008.

4.Nc3 e6–/+ 5.a3 Nbd7 6.h3 h6 7.e3=+ Ne4 8.Nce2 Bd6–/+ 9.Nf3 c6 10.Ne5 Nb6 11.Nf4=+ Na4 12.Bc1 Nac3–/+ 13.Qh5 Be5 14.de5 Ng5 15.g3?? g6 –+ (16.Nd5 Qd5–+; 15...Bc2 16.Bb2 g6 17.Qg4–+) 0–1. Kopp,Norbert – Iwanow,Thomas, Pinneberg–ch, 2003.

4.Nf3 Nc6 5.b5 Nb4 6.Na3 g6 7.c3+– e6 8.Qb3 Qd6 9.Rc1 a5 10.cb4=+ Qb4?? 11.Qb4 Bb4 12.Kd1?? 0–0?? 13.Bc3?? Bc3 14.Rc3=+ Ne4 (Black gets strong initiative) 15.Rc7 Nf2 16.Ke1 Nh1 17.e3 b6–+ 18.Be2 Rac8 19.Rc8 Rc8 20.Kd2 Nf2 21.Ne5 Ne4 22.Kd1 Nc3 23.Ke1 Ne2 24.Ke2 Be4 25.g3 Rc3 (26.Nac4 dc4–+) 0–1. M8IN3 – Andersen30, Live Game Caissa's Web, 2005.

4.Nd2 e6

5.a3 Bd6 6.Ngf3 Nbd7 7.e3 Ne4 8.c4 dc4 9.Bc4 Nb6 10.Be2 0–0 11.Bd3? Nf2–/+ 12.Kf2 Bd3 13.e4 Bf4 14.Qb3 Bd2 15.Nd2 Bb5 16.a4 Bd7 17.Nf3 Nc8 18.h4 Qf6 19.Rh3 Qf4 20.Qd3 e5 21.Bc1 Qf6 22.de5? Qb6 23.Be3 Qb4 24.Rb1 Qa4 25.Rg3 Re8 26.Bh6 g6 27.h5? Bc6–+ 28.Rg4 Nb6 29.hg6 fg6 30.Kg3 Qc4 31.Qe3 Nd7 32.Qf4 Qe6 33.Rh1 Ne5 34.Rgh4 Nf3 35.gf3 Qe5 36.Bg5 Qf4 37.Bf4 Re7 38.Bg5 Rf7 39.e5 Re8 40.Re1 Bd5 41.f4 Re6 42.Bh6 Ra6 43.Rg4 Ra3 44.Kh4 Be6 45.Rd1 Rd7 46.Rf1 Bg4 47.Kg4 Rdd3 48.Rg1 Rh3 49.Bg5 h5# 0–1. Betke,Arno – Higgelke,Anne, Mecklenburg LL, 1992.

5.a3 Ne4 6.Ngf3 Nd7 7.e3 Be7 8.c4 0–0 9.c5 c6 10.Ne5 (10.Ne4 de4 11.Nd2 a5=) 10...Bf6 (10...Ne5!? 11.de5 b6+=) 11.Be2= Be5 12.de5 Nd2 13.Qd2 a5 14.h4 (14.0–0 Qc7=) 14...h6 15.g4 Bh7 16.Bd3 (16.Bd4!?=) 16...Bd3+= 17.Qd3 ab4 18.ab4 Ra1 19.Ba1 b6 20.Bd4 (20.g5!? h5 21.0–0–/+) 20...bc5 21.bc5 Qa5 22.Qc3 (22.Qd2 Ra8–/+) 22...Qc3 23.Bc3 Nc5 24.0–0 Ra8 25.Rb1 g6 26.Rb6 Ra6 27.Rb8 Kg7 28.h5 (better is 28.Bd4!? Nd3 29.Rb3–/+) 28...Ne4 29.Be1 (29.Bb2 gh5 30.gh5 c5–+) 29...c5 (29...Ra1!? 30.Kf1 Nc5 31.Ke2–+) 30.Rc8 Ra1 31.Kf1 c4 32.Ke2 Ra2 33.Kf1 gh5 34.gh5 Ra1 35.Ke2 Ng5 36.Bb4 Ra2 37.Kf1 Ne4 38.Be1 c3! 39.f3 Nd2 40.Bd2 cd2 41.Ke2 d1Q! 42.Kd1 Rh2 43.f4 Rh5 44.Ke2 Rh3 45.Kf2 h5 46.Re8 h4 47.Ra8 Rg3 48.Ra7 Rg6 49.Ra1 Kh6 50.Rh1 Kh5 51.Rh3 Kg4 52.Rh1 h3 53.Rh2 Rh6 54.Rh1 h2 55.Kg2 d4! 56.ed4 Kf4 57.Rf1 Ke4 58.Kh1 Kd4 59.Rf7 Ke5 60.Rf2 Ke4 61.Re2 Kf3 62.Re5 Kf4 63.Re1 e5 64.Rf1 Kg4 65.Rf8 Rh5 66.Rf7 Rh3 67.Rf8 e4 68.Rf7 e3 69.Rf8 e2 70.Rg8 Kf3 71.Rf8 Ke3 72.Re8 Kd2 (72...Kd2 73.Rd8 Rd3 74.Re8 e1R 75.Kh2 Re8 76.Kg1 Rg8 77.Kf2 Rgg3 78.Kf1 Rdf3#) 0–1. Kruchinin,Anatoly V (2015) – Fedotov,Ivan, Vladimir op–B, 2004.

5.a3 Be7 6.Ngf3+= 0–0 7.e3 Nbd7 8.c4 a5 9.b5 dc4 (9...c6 10.c5+=) 10.Nc4= a4 11.Be2 Be4 (11...Nb6 12.Rc1=) 12.0–0+= c6 13.bc6 Bc6 (13...bc6 14.Bd3+=) 14.Nfe5 (14.Rc1 Qc7+=) 14...Ne5= 15.Ne5 Bd5 16.Bf3 (16.Qc2 Nd7=) 16...Qb6 17.Bd5 ed5 18.Rb1 Qa5 (18...Rfc8 19.Bc3 Qe6 20.Bb4=) 19.Qd3 Qa6 20.Qa6 Ra6 21.Rfc1 (21.f3 Rb8=) 21...Rb6+= 22.f3? (better is 22.Nd3!?+=) 22...Rb2!–/+ 23.Rb2 Ba3 24.Rcb1 Bb2 25.Rb2 Ra8 (better is 25...Rb8!?–+) 26.Rb7+= a3 27.Rb1 (27.Rf7 a2 28.Kf2 a1Q 29.Rf6 gf6 30.Nd7 Kf7 31.f4 Ra2 32.Kg3 Qe1 33.Kh3 Qe3 34.Kh4 Rg2 35.Ne5 fe5 36.de5 Qf4 37.Kh3 Rh2) 27...Ne8 28.Nc6 Nc7 29.Ra1 Ra4 30.Kf2 (30.Ne5 g5+=) 30...Kf8 (30...Rc4!? 31.Ne7 Kf8 32.Nd5 Rc2 33.Kg3 Nd5 34.Ra3 g5–/+) 31.Ne5+= Nb5 32.Nd7 Ke7 (better is 32...Ke8!? 33.Nb6 Rb4–/+) 33.Nb6= Ra5 34.Nd5 Kd6 35.Nb4 Ra4 36.Nc2 (36.Nd3 Rc4=) 36...Kd5+= 37.Rc1 a2 38.e4 (38.Ke2 Rc4 39.Kd2 Na3+=) 38...Kc4 39.d5? (better is 39.Na1 Kd3 40.d5–/+) 39...Kb3–+ 40.Na1 Kb2 41.Rd1 (41.Rf1 Nc3 42.Ke3 Nb1–+) 41...Nc3 42.Re1 f6 43.Ke3 Nb1 44.f4 (44.d6–+) 44...Ka1 45.e5 (45.d6 Ra3 46.Kd4 Kb2 47.Re2 Kb3 48.Ra2 Ra2–+ (48...Ka2?! 49.d7 Ra8 50.e5 fe5 51.fe5=)) 45...fe5 46.fe5 Kb2 47.Re2 Kb3 48.Ra2 Ra2 49.d6 Rd2 50.Ke4 Nc3 51.Kf5 Nb5 52.Ke6 Nd4 53.Kd5 (53.Kd7 Kc4 54.e6 Nf5–+) 53...Nf3 54.Ke4 (54.Ke6 Rg2 55.d7 Rd2–+) 54...Ne5! 55.Ke5 Rg2 56.h4 (56.d7 Rd2 57.Ke6 h6–+) 56...g5 57.d7 Rd2 58.hg5 Rd7 59.Ke6 Ra7 0–1. Farkas,Miso – Popov,Stevan (2205), Vojvodina Cup, 2008.

5.e3 Bb4 6.Ngf3 0–0 7.c3 Be7 8.Ne5 Nbd7 9.Ndf3 c5 10.Be2 cd4 11.ed4 Ne4 12.0–0 Ne5 13.Ne5 Bd6 14.Bg4 Be5 15.de5 Bg4 16.Qg4 Rc8 17.Bc1 Qc7 18.f4? Qc5 19.Kh1 Qc3 20.Rb1 Nf2 (21.Kg1 Ng4–+) 0–1. patman007 – michaelbuss, ChessWorld.net, 2005.

4.e3 e6

5.a3 Bd6 6.Bb5 (6.Nf3 Nbd7+=) 6...c6 7.Bd3 Bg6 8.Nc3 Nbd7 9.h3 0–0 10.Nf3 Qe7 11.Nh4 a5 12.Ng6 hg6 13.b5 e5 14.f3?? (better is 14.0–0+=) 14...ed4–+ 15.Ne2 de3 16.g4 (16.0–0 c5 17.c3 Rfe8–+) 16...Ne5 (16...Ne4 17.0–0 Nd2 18.f4–+) 17.Be5 (17.0–0 g5–+) 17...Qe5 (better is 17...Be5!? 18.c3 Ne4 19.0–0–+) 18.f4 Qe7 19.h4 (19.bc6 Ne4 20.0–0–+) 19...Ng4 20.f5 (20.Qc1 Nf2 21.0–0 Qh4 22.Qe3 Ng4–+) 20...Ba3 (20...Nf2 21.Qc1 Nh1 22.Kf1–+) 21.fg6 (21.Ra3 Qa3 22.0–0 Nf2–+) 21...Bb4 (better is 21...Nf2 22.Qb1 Nh1 23.Ra3 Qa3 24.bc6 bc6 25.Kf1 fg6 26.Kg2–+) 22.c3 Bd6 (22...Nf2!? 23.Qb1 Nh1 24.bc6 bc6 25.cb4 fg6 26.Qb2–+) 23.Qc2 Qf6 (better is 23...Nf2 24.Rg1 Qh4 25.bc6 Nd3 26.Kd1 Nf2 27.Kc1 bc6 28.Nd4–+) 24.Bf5 (24.gf7 Rf7 25.0–0–0–+) 24...Nf2 (better is 24...fg6 25.0–0–0 gf5 26.Rhg1–+) 25.Rg1 (25.gf7 Rf7 26.Rf1 c5–+) 25...fg6 26.Bg6 (26.bc6 gf5 27.cb7 Rab8–+) 26...Nh3 (better is 26...Bh2 27.Qf5 Bg1 28.Qh5–+) 27.0–0–0 Ng1 28.Rg1 cb5 (28...a4!? 29.Bh7 Kh8 30.Qg6–+) 29.h5 (29.Qd3 Qe6 30.Nd4 Qe5–+) 29...a4 30.h6 Ba3 31.Kb1 Qf1 32.Rf1 Rf1 33.Ka2 Bc5?? (33...Be7 34.Qd3 gh6 35.Qe3+–) 34.hg7 (better is 34.Bh7 Kf7 35.Qg6 Ke7 36.hg7+–) 34...Kg7= 35.Bd3?? (35.Qd3 Rf2 36.Bh5 b6=) 35...Rf2?? (better is 35...Rh8 36.c4 dc4 37.Bc4 Rhh1–/+) 36.Bb5 a3 37.Qd3 Rd8 38.Kb3 b6 39.Nc1?? (better is 39.Qd1=) 39...Rb2 40.Ka4 Ra8 41.Ba6 a2 42.Na2 Ra2 (better is 42...Ra6 43.Qa6 Ra2 44.Kb5 Ra6 45.Ka6 e2 46.c4 d4 47.Kb5 d3 48.Kc6 e1Q 49.Kc7 d2 50.Kd7 d1Q 51.Kc6 Qe8 52.Kb7 Qdd7 53.Ka6 Qec8) 43.Kb3 (43.Kb5 R8a6 44.Qf5 R6a5 45.Kc6 Kh6 46.Qh3 Kg5 47.Qg3 Kf5 48.Kd5 Rd2 49.Kc4 Ra4 50.Kb5 Rg4–+) 43...R8a6 44.Qd5 R6a3 45.Kc4 e2 (45...Ra4 46.Kb3 Kh6 47.Qh1 Kg5 48.Qg1 Kf4 49.Qf1 Ke5–+) 46.Qg5= Kf7 47.Qf4 Ke7 48.Qe5 Kd7 49.Qd5?? (49.Qf5 Kc7 50.Qf7 Kc6 51.Qd5 Kc7 52.Qf7 Kb8 53.Qe8 Kb7 54.Qd7 Ka6 55.Qb5 Ka7 56.Qd7 Ka8 57.Qc8 Ka7 58.Qd7 Ka6 59.Qb5 Kb7 60.Qd7 Ka6=) 49...Kc7 (better is 49...Bd6 50.Qf5 Kc7 51.Qf7 Kb8–+) 50.Qf7= Kb8 51.Qe8 Kc7 52.Qe5?? (52.Qf7 Kc8 53.Qe6 Kb7 54.Qd5 Ka7 55.Qd7 Ka6 56.Qb5 Kb7 57.Qd7 Ka8 58.Qc8 Ka7 59.Qd7 Ka6 60.Qb5 Kb7 61.Qd7 Ka6=) 52...Kd7 53.Qd5 Ke7 (better is 53...Bd6 54.Qf7 Be7 55.Qf5 Kc7 56.Qf4 Bd6 57.Qf7 Kb8–+) 54.Qe5= Kd7 ½–½. grahamtrue (2165) – cristero (2460), net–chess.com, 2015.

5.a3 Nbd7 6.c4 c6 7.c5 Be7 8.Nf3 0–0 9.Bd3 Bd3 10.Qd3 a5 11.0–0 ab4 12.ab4 Ra1 13.Ba1 Qc7 14.Nbd2 b5 15.Nb3 ½–½. Omar,Gonzalo Martin (1745) – Rezny,Daniel, corr WC15/WS68 ICCF, 2006.

5.a3 Be7 =+.

5.c3 Bd6 6.Bb5 c6 7.Ba4 Nbd7 8.Nd2 e5 9.Ngf3 e4 10.Nh4 Be6 11.g3 Bg4 12.Qb3? (better is 12.f3 ef3 13.Nhf3–/+) 12...b5–+ 13.Bb5 cb5 14.h3 Be6 15.g4 Nb6 16.Nf5 Bf5 17.gf5 Qd7 18.0–0–0 a5 19.ba5 Ra5 20.Rdg1 Rg8 21.h4 Nc4 22.Kc2 (22.Rg5 h6 23.Rg2 Qf5–+) 22...Qf5 23.Rg2 Ng4 24.Kc1 (24.Re1 Nf2 25.Re2 Nd3–+) 24...Nf2 25.Rf1 (25.Nc4 dc4 26.Rf2 Qf2–+) 25...Nd3 26.Kd1 Ne3 27.Ke2 Nf1 (27...Nf1 28.Qd5 Qd5 (28...Nb2?! 29.Qf5 Nd2 30.Qc8 Ke7 31.Qg8–/+) 29.Kf1 Qa2–+) 0–1. Crossman,Chris – Granara Barreto,Sebastian (2245), IECG, 2003.

5.Bd3 Bb4!? 6.Bc3 Bd6 –/+.

5.Bd3 Nbd7 6.Bf5+= ef5 7.Nc3 (7.a3 Nb6+=) 7...f4 (7...Bb4 8.a3 Bc3 9.Bc3–/+) 8.ef4 Bb4 9.Nge2 0–0 10.0–0 Bc3 11.Bc3 Rb8 12.a4 c6 13.Bb2 Qb6 14.Ba3 c5 15.dc5 Nc5 16.Nd4 Rbc8 17.g3 (17.Rb1 Qa6=) 17...h6 (17...Rfe8 18.Rb1 Qa6 19.Bc5 Rc5 20.Re1+=) 18.Re1= Nfe4 19.Nf5 Qf6 20.Qd5 Rfe8 21.Bc5 Rc5 22.Qd7 (22.Re4?? Qa1 23.Kg2 Rd5 24.Re8 Kh7–+) 22...Kf8 23.Rad1?? (better is 23.f3 Qb6 24.Qd4+=) 23...Qf5–+ (23...Rf5?! 24.f3 Qb6 25.Kh1 Ng3 26.hg3 Re1 27.Re1=) 24.f3? (better is 24.Qb7 Rc2 25.Rd4–+) 24...Qd7 25.Rd7 Ng3! 26.Re8 (26.hg3 Re1 Double attack (26...Re1 Discovered attack)) 26...Ke8 27.Rb7 Nh5 28.Ra7 f5 29.a5 Rc2 30.a6 Rc6 (better is 30...Ra2!? 31.h4–+) 31.Ra8 Ke7 32.a7 Rg6 33.Kf2 Ra6 34.Ke3 (34.h3 Ra2 35.Ke1 Kf7–+ (35...Nf4?! 36.Rg8+=)) 34...Nf6 35.h4 Ra1 36.Kd2 Kf7 37.Kc2 Ra4 38.Kb3 Ra6 39.Kc4 Ne8 40.Kb5 (40.h5–+) 40...Nc7 41.Kc5 Na8 0–1. wote – dany59 (1985), gameknot.com, 2012.

4.Nf3 e6

5.a3 a5 =+.

5.a3 Bd6 6.e3 Ne4 7.Bd3 0–0 8.Nbd2 Nd2 9.Qd2 Nd7 10.0–0 Be4 (10...Qf6 11.Qe2=+) 11.Be4 (11.Ne5 Bd3 12.cd3 f6 13.Nd7 Qd7=) 11...de4 12.Ne1 (12.Ne5 Nb6 13.Qe2 Na4=+) 12...b6 13.Qc3 Nf6 14.f3 Rc8 15.f4 Nd5 16.Qd2 c5 17.dc5 bc5 18.bc5?? Bc5–+ 19.Qf2 Qb6 20.Bd4 Rc7 21.Rd1 Rd8 22.Qg3? f6 23.Qf2? Rdd7 24.a4? a5 25.Qd2?? Qb4 26.Qe2 Nc3 27.Bc3 Qb6?? 28.Rd7+– Rd7 29.Bd2?? Bb4?? 30.Bb4 ½–½. coachwright – Hart2Hart, corr Tour D#662, 2004.

5.b5 a5 6.a4 Bd6 7.e3 0–0 8.c4 Bb1 9.Rb1 Ne4?? (better is 9...Bb4 10.Ke2 Nbd7–/+) 10.c5+= Be7 11.Bd3 Nd7 12.Qc2 f5 13.g3 (13.0–0 Qc8+=) 13...Ndf6 (13...b6 14.cb6 Bb4 15.Kf1 cb6 16.Rc1=) 14.h3 b6 15.c6 Bb4 16.Ke2 h6 17.Ne5 Kh7 18.Rbg1+= g5? 19.f3 Nd6 20.g4+– Ng8? 21.Bc3 Ne7 22.Nd7 Bc3 23.Qc3 Ne8?? 24.h4 Rg8 25.hg5 Rg5 26.gf5 Nf5 27.f4 Rg1+/– 28.Rg1 Neg7 29.Qe1+– Qe7 30.Qg3 Qf7 31.Ne5 Qh5 32.Kd2 Rg8 33.Rg2 Kh8 34.Qf2 Ne8?? 35.Rh2 Qh2 36.Qh2 Neg7 37.Bf5 Nf5+– 38.Qh5 Kh7 39.Qf7 Rg7 40.Qe6 Ng3 41.Qd5 Nf1 42.Kd3 h5 43.Qd7! h4 44.Qh3 Kg8 45.Qf1 Rg3 46.f5 h3 47.f6 h2 48.Qh1 Rh3 49.Qd5 Kh7 50.Qf7 Kh8 51.Qg7# 1–0. Baer,Cy (1895) – Tortoza,Carlos, CiF, 2007.

5.b5 Nbd7 6.e3 –/+.

5.c3 Bd6–/+ 6.e3 0–0 7.Bd3 Bd3 8.Qd3 Nbd7 9.a4 b6 10.0–0 c5 11.bc5 bc5 12.c4 cd4 13.Bd4 e5 14.Ne5? Ne5–+ 15.Be5 Be5 16.Ra3 dc4 17.Qc4 Rc8 18.Qa6 Qe7 19.Rd3 h6 20.Nd2 Rfd8 21.Rd8 Rd8 22.Nf3 Bc7 23.Kh1 Bb6 24.a5 Bc5 25.Rc1 Ne4 26.Kg1 Nf2! 27.Kf2 Qe3 28.Kg3 Qc1 29.Qb5 Bd6 30.Kh3 Qe3 31.Qf5 Qe6 32.g4 Qf5 33.gf5 Bb4 34.Ne5 Ba5 35.Nc6 Rd5 36.Na7?? Rf5 37.Kg4 Rg5 38.Kh4 f5 39.Nc6–+ f4 40.Nd4 Be1 41.Kh3 Rh5 42.Kg4 Rh4 43.Kf3 g5 44.Nf5 Rh2 45.Ke4 h5 46.Kf3 Rh3 47.Ke4 f3 48.Nd4 f2 49.Ne2 f1Q 50.Nd4 Qc4 51.Ke5 Re3 52.Kf6 (52...Qd4 53.Kg5 Re5 54.Kg6 Qd6#; 52.Kf5 Qd4 53.Kg5 Re5 54.Kg6 Qd6#). M8IN3 – wpk05, Live Game Caissa's Web, 2005.

3.e3 a5

4.ba5 Nbd7 5.a6 (5.Nf3 e6=) 5...ba6=+ 6.d4 (6.Nf3 Rb8 7.Bf6 Nf6=+) 6...Rb8 7.Bc3 Ne4 8.Ba5 e5 9.Nf3 ed4 10.ed4 Bd6 11.Bd3 0–0 12.0–0 Re8 13.c4 dc4 14.Bc4 Nb6 15.Bd3 Bb7 16.Re1 Qf6 17.Qe2 Re7 18.Qc2 Rbe8 19.Nc3? (19.Nbd2 Nd2 20.Bd2 Bf3 21.Re7 Re7 22.gf3 Qd4 23.Rb1–+) 19...Nc3–+ 20.Bc3 (20.Re7 Qe7 (20...Re7?! 21.Qc3 Bf3 22.Bb6–/+; 20...Be7?! 21.Bc3 Bf3 22.gf3–/+) 21.Bh7 Kh8 22.Qc3 Kh7–+) 20...Bf3 21.Re7 (21.gf3 Qh4 22.Re5 f6 (22...Re5?! 23.de5 Qg5 24.Kh1 Be5 25.Re1–/+) 23.Bh7 Kh8 24.Re7 Re7–+) 21...Re7 (21...Be7?! 22.gf3 Bd6 23.Re1 Re1 24.Be1–/+) 22.gf3 (22.Bh7 Kh8 23.Bd3 Qg5–+) 22...Qf4 (22...Qf3?! 23.Rd1–+) 23.Bh7 Kh8 24.Be4 Qh2 25.Kf1 Qh3 (25...Nd5 26.Qb3 c6 27.Ke2–+) 26.Ke2 f5 27.Re1 0–1. market (1955) – Dubac (2200), GameColony.com, 2002.

4.b5 c6 5.a4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 a5).

4.b5 Nbd7 5.Nf3 e6 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6 4.Bb2 d5 5.e3 Nbd7).

4.Bf6 gf6 5.c3 Bg7 6.ba5 c5 7.h3 Qa5 8.Qb3 c4 9.Qb4 (9.Qc2!?+=) 9...Qb4–/+ 10.cb4 f5 11.Nc3 Nc6 (11...Na6 12.Rb1 Nc7 13.Nge2–/+) 12.Rb1 (better is 12.Nd5!? Ba1 13.Nc7 Kd8 14.Na8+=) 12...Bc3–/+ 13.dc3 Ra2 14.Rc1 e5 15.Nf3 b5 16.Be2 Rg8 17.g3 f6 18.Bd1 Kf7 19.0–0 (better is 19.Rc2 Ra1 20.Kd2–+) 19...f4 20.ef4 Bh3 21.Re1 ef4 22.Kh2 Bf5 23.Re2 fg3 24.fg3 Ra7 25.Nh4 Bg4 26.Rf2 Bd1 27.Rd1 Ne7 (27...Ne5 28.Kh3 Nd3 29.Rf3–+) 28.Kh3 Ra3 29.Rc1 (29.Rf3–+) 29...d4! 30.Nf5 (30.cd4 Rd3 Double attack (30...Rag3 Pinning; 30...Rag3 Deflection; 30...Rd3 Decoy)) 30...Nf5 31.Rf5 Rc3 (31...dc3?! 32.Rb5 c2 33.Rb7 Ke6 34.Rc2 Rgg3 35.Kh2 Rh3 36.Kg1 Rag3 37.Kf2–+) 32.Rcf1 (32.Rc3 dc3 33.Rf3–+) 32...Rgg3 (better is 32...Rcg3!? 33.Kh2 Rg2 34.Kh1–+) 33.Kh2 Rh3 34.Kg2 Rcg3 35.Kf2 Ke6 36.Rb5 Rf3 37.Ke1 Rf1 38.Kf1 Rb3 (better is 38...Rh1 39.Kg2 d3 40.Rb6 Ke5 41.Rb5 Ke4 42.Rb6–+) 39.Ke2 f5 40.Kf2 (40.Rb8 d3 41.Kd2 f4 42.Re8 Kd5–+) 40...c3 41.Ke2 (41.Rc5–+) 41...c2 42.Kd2 d3 (42...Rc3 43.Kc1 d3 44.Rb6 Ke5 45.Rb5 Ke4 46.Ra5 d2 47.Kb2 c1Q 48.Ka2 Qc2 49.Ka1 d1Q) 43.Rc5 Rb1 44.b5 (44.Kd3 c1Q 45.Rc1 Rc1–+) 44...Rd1 45.Ke3 c1Q (45...f4 46.Kf4 Re1 47.Rc6 Kd7 48.Kf5–+) 46.Rc1 Rc1 47.Kd3 Rc5 48.b6 Rb5 (48...Rb5 49.Ke3 Rb6–+) 0–1. Bandy 1 – the horror man, ChessWorld.net, 2014.

4.b5 c5

5.Nf3 Bf5 6.c4 e6 7.a4 Nbd7 8.d3 Qc7 9.Be2 (9.Nh4 Bg6=) 9...Bd6 (9...dc4 10.dc4 Rd8 11.Nbd2+=) 10.Nbd2= h6 11.h3 Ke7 (11...Rd8 12.cd5 ed5 13.Rc1=) 12.Qb3 (12.Rc1 Rhd8+=) 12...Rhd8 13.0–0–0 (13.cd5 ed5 14.Rc1 Kf8=) 13...Ne5 (13...Bg6 14.Rhg1=) 14.g4 White launches an attack 14...Bg6 15.Nh4 Bh7 16.f4 dc4 17.dc4 Ng6 (17...Ned7 18.Bf3+=) 18.Nhf3 White plans g5 18...Kf8 19.g5 hg5 (19...Ng8 20.Rhg1 Be7 21.Qc3+/–) 20.Ng5+– (20.fg5?! Nd7+=) 20...Bg8 21.h4 Nh7 22.h5 Ne7 23.Rhg1 (23.b6 Qb8+–) 23...e5 (23...Ng5 24.Rg5 f6 25.b6+–) 24.Nde4 f6 25.Nd6 Rd6 26.Rd6 Qd6 27.Rd1 Qc7 28.Nh7 Bh7 29.fe5 fe5 30.Rf1 Kg8 31.Qc3 Re8 32.Bg4 Nc8 33.Qd2 Kh8 34.Rd1?? Bg8? 35.h6+– Nb6? 36.hg7 Kg7 37.Qa5 Re7? 38.Rg1 Kf8+/– 39.Rf1 Ke8?? 40.Bh5 Kd7? 41.Qd2 Qd6 42.Bg4?? Kc7+/– 43.Qd6 Kd6 44.Rf6 Kc7 45.a5 Nc4 46.b6 Kd8 47.Rf8 Re8 48.Re8 Ke8 49.a6 Bd5 50.Be6! Nb6 51.Bd5 ba6 52.Bc6 Ke7 53.Be5 Nc4 54.Bf4 Ke6 55.e4 Nd6 56.Bd5 Kd7 ½–½. De Visser,Arno – Mossing Holsteijn, 1993.

5.Nf3 Bg4 6.Be2 e6 7.0–0 Bd6 8.h3 Bh5 9.d3 0–0 10.Nbd2 e5 (better is 10...Nbd7!?=) 11.Ne5+/– Be2 12.Qe2 Be5 13.Be5 Nbd7 14.Bb2 Qb6 15.a4 Qe6 16.Rae1 Rae8 17.Qd1 b6 18.c4 Qf5 19.e4! de4 20.Ne4 Ne4 21.de4 Qe6 22.Qd5 Nf6 23.Qg5 h6 24.Qg3 Nh5 25.Qh4 Nf6 (25...Qg6 26.Re3+/–) 26.Bf6+– Qf6 27.Qf6 gf6 28.f3 Rd8 29.Rd1 Rd4 30.Rd4 cd4 31.Rd1 Rd8 32.g4 Kg7 33.Kf2 Kg6 34.h4 h5 35.Kg3 (35.Rc1 hg4 36.fg4 Rh8+–) 35...Kh6 36.Kf4 Kg6 (36...Kg7 37.Rd3+–) 37.Rd3 Rd7 38.gh5 (better is 38.e5!? Rd8+–) 38...Kh5 39.e5 Kh4 40.ef6 Rd6 (40...Rd8!?+–) 41.Ke5 Rd7?? (41...Re6 42.Kd4 Rd6 43.Ke4 Rf6+–) 42.Rd4 Rd4 43.Kd4 Kg5 1–0. zabazaba (1655) – teddyblueabbott, gameknot.com, 2015.

3.e3 a6

4.a3 Nbd7 5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 a6).

4.a3 Bf5 5.Be2 Nc6 (5...e6 6.Nf3=) 6.Nf3 Be4 (6...Qd6 7.d4=) 7.d3+= Bf3 (7...Bg6 8.Nbd2+=) 8.Bf3 e5 (8...e6 9.c4+=) 9.0–0 (9.c4+=) 9...Bd6 (9...Qd6 10.Nd2+=) 10.Nd2 (10.c4 Qd7 11.cd5 Ne7+/–) 10...0–0 (10...a5 11.c4+/–) 11.c4 Ne7? (better is 11...Re8+/–) 12.c5+– e4? (12...c6 13.cd6 Qd6+–) 13.cd6 (13.de4 Bh2 14.Kh2 de4 15.Ne4 Ne4 16.Be4 c6+–) 13...Qd6 (13...ef3 14.de7 Qe7 15.Qf3+–) 14.de4 de4 (14...Qe6 15.Bf6 Qf6 16.ed5+–) 15.Ne4 (15...Ne4 16.Be4+–) 1–0. mic (2225) – kkoushik (2115), net–chess.com, 2007.

4.a3 Bg4 5.Be2 Be2 6.Ne2 e6 =.

4.a4 c6 5.c4 Be6 6.c5 Bg4 7.f3 Bf5 8.a5 Nbd7 9.Nc3 e5 10.d4 Qe7 11.g4 Bg6 12.Qd2 (12.de5 Ne5 13.g5 Nh5=+) 12...ed4 13.Qd4 0–0–0 14.0–0–0 h5 15.g5 Ne8 16.h4 Ne5 17.Bh3 Kb8 18.f4 Nc4 19.f5 Qe3 (better is 19...Bh7!?=+) 20.Qe3+= Ne3 21.fg6 Nd1 22.Kd1 f6 (22...fg6!? 23.Be6 Nc7+=) 23.Nf3+/– Nc7? (23...d4 24.Ne4 fg5 25.Neg5 Be7+–) 24.gf6+– gf6 25.Nd4 Bh6 26.Nce2 Be3 27.Bc1 Rde8 28.Be3 Re3 29.Kd2 Re5 30.Rg1 Ne8 31.Be6 Ng7+/– 32.Bf7 Re4 33.Rf1 Rh4 34.Nf5 Nf5+= 35.Rf5 Rg4 36.Rf4 Rg2 37.Rf1 h4 38.Rg1 Rg1–/+ 39.Ng1 h3 40.Nh3 Rh3 41.g7 Rg3?? 42.g8Q+– Rg8 43.Bg8 (43...f5 44.Be6+/–) 1–0. Filipov,V – van Duske,L, corr ICCF EU–H–GT–7, 1988.

4.a4 Qd6 5.b5 e5 6.Nf3 Bg4 7.Be5 Qe5 8.Ne5 Bd1 9.Kd1 Bd6 10.Nf3 Ng4 11.h3?? (better is 11.Ke1+=) 11...Nf2–+ 12.Kc1 Nh1 13.c4 d4! 14.Nd4 (14.ed4 Ng3 Combination; 14.Nd4 ab5 Combination) 14...Be5 15.Ra3 0–0 16.Nf3 Bf6 17.Nc3 Be7 18.Rb3 ab5 19.Nd5 Bd6 20.ab5 Ra1 21.Rb1 Ba3 22.Kc2 Ra2 (better is 22...Rb1 23.Kb1 Ng3–+) 23.Kb3+= Rb2 24.Rb2 Bb2 25.Kb2 Nd7 26.Nc7 Rc8 27.Nd5 Kf8 28.Bd3 Nf2 29.Bf5 (worse is 29.Bh7 g6 30.Kc3 Kg7+=) 29...Ke8?? (better is 29...Rd8+/–) 30.Bd7+– Kd7 31.Nb6 Kd8 32.Nc8 Kc8 33.Ne5 (33.Ng5!? f6 34.Nh7 Kd7+–) 33...f6 34.Nf3 Nd3 35.Kc3 Nf2 36.Kd4 Kc7 37.Kd5 b6 (37...g6 38.c5+–) 38.Nd4 Kd7 (38...g5 39.Ne6 Kb7 40.Ng7+–) 39.Nf5 (better is 39.Ne6!? Nd3 40.Ng7 Kd8+–) 39...g5 40.c5 bc5 41.Nd6 Nd3 (41...Kc7 42.Ne4 Nd3 43.Nf6+–) 42.b6 Nb4 43.Kc5 Na6 (43...Nd3 44.Kd5+–) 44.Kb5 Nb8 45.Ne4 f5 (45...Ke6 46.d4 h6 47.g4+–) 46.Ng5 h5 47.Nf3 Kc8 48.Nd4 1–0. Wilke,Hans_Peter (1655) – Lippianowski,Stefan, Lichtenberger Sommer, 2015.

4.a4 e5 5.Be5 Bb4 6.c3 Nc6 7.Bc7 Qc7 8.cb4 Nb4 9.Nc3 Bf5 10.Rc1 Qa5 11.Qb3 Nd3 12.Bd3 Bd3 13.Nd1 Bc4 14.Qb7 0–0 15.Nc3 (15...d4!! (Solare)) 1–0. marekt – laura, gameknot.com, 2001.

4.Nc3 Nc6 5.a3 e5 6.Be2 Bd6 7.Nf3 Be6 8.0–0 h6 (8...e4 9.Ng5+=) 9.h3 0–0 10.d3 Qd7 11.Qd2 e4 12.Nd4 Nd4 13.ed4 Bh3 14.Rfe1? (14.de4 de4 15.gh3 Qh3–/+) 14...Bg4 (14...ed3!? 15.Bd3 Qg4–+) 15.de4–/+ de4 16.Bg4 Qg4 17.Qe2 Qh4 18.g3 Qh3 19.Ne4 Rae8? (better is 19...Ne4!? 20.Qe4 b5=) 20.Nf6+/– gf6 21.Qf1 (21.Qf3 b6+/–) 21...Qg4 22.Re8 Re8 23.Re1 Rf8 (23...Re1 24.Qe1 b5 25.Kg2+=) 24.Qg2 Kh7 25.Qb7 Rg8 (better is 25...Bg3!? 26.Qg2 Bh2 27.Kh1 Qg2 28.Kg2 Bd6+/–) 26.Qg2 f5 0–1. rthurc (2315) – ramesis (2300), net–chess.com, 2013.

4.c4 e6 5.cd5 (5.a3 a5=) 5...Nd5 (5...ed5 6.a3+=) 6.a3= Nd7 7.Nf3 Bd6 (better is 7...N7f6!?=) 8.Bg7+/– Rg8 9.Bb2 N7b6 10.Nc3 Bd7 11.g3 (11.Ne4 Ba4 12.Qe2 a5+/–) 11...Qe7 (11...Nc3 12.Bc3 Bc6 13.Bg2+/–) 12.Qc2 f5 13.Nd5 Nd5 14.Bc4 (14.Nd4 Qf7+/–) 14...Bc6 15.Nd4 (15.Be2 Qd7+/–) 15...Ne3 (15...Nb4 16.ab4 Bh1 17.Be6=) 16.de3 Bh1 17.Be6 Be4 (17...Rg6 18.Qb3+=) 18.Qb3 Rf8 (18...Rg6!?+=) 19.f3+/– Bc6 20.Nf5 Qg5 21.Ng7 (21.e4 Rd8 22.Ng7 Ke7+/–) 21...Ke7 22.Bg4 (22.f4 Qg6 23.Qc3 Rf6 24.Qf6 Qf6 25.Bf6 Kf6+=) 22...Bd5 23.Qc3?? (23.Qd3 Be5 24.Be5 Qe5+/–) 23...Rf7?? (better is 23...Bf3 24.Bf3 Rf3–+) 24.0–0–0 Rg8 (24...Rf3 25.Bf3 Bf3 26.Rd6 Kd6 27.Qc7 Kc7 28.Ne6 Kd6 29.Ng5=) 25.Nf5 (25.Qd3 Rgg7 26.Bg7 Qg7 27.Qd5 Qa1 28.Kc2 Qa3+/–) 25...Rf5+= 26.Bf5 Qf5 27.e4 Qg5 28.f4 (better is 28.Rd2!? Bc6 29.e5+=) 28...Bf4+= 29.gf4 Qf4 30.Kb1 (30.Qd2 Qd2 31.Kd2 Rg2 32.Kc3 Bc6+= (worse is 32...Be4 33.Re1+/–)) 30...Be4 31.Ka1 c6?? (better is 31...Rg6!?+=) 32.Qd4 (better is 32.Qc5 Ke8 33.Qd4+–) 32...Qf5 33.Qd6 Kf7 34.Qd4 (34.Qc7 Kg6+=) 34...Bd5= 35.Re1 (35.Qa7 Qd7 36.Qf2 Ke8 37.Re1 Kd8+/–) 35...Rg4 (35...Rg2 36.Qe3 Kg6 37.h3+=) 36.Qc5 (better is 36.Qb6!?+=) 36...Re4+= 37.Rg1 Rg4 (37...Ke6 38.Qa7+=) 38.Re1= Re4 39.Rg1 Rg4 (39...Ke6!?+=) 40.Re1= ½–½. zabazaba (1645) – snjoomann (1625), gameknot.com, 2014.

4.d3 e6 5.a3 c5 6.c3 Nc6 7.Nf3 c4 (better is 7...e5!?=+) 8.dc4+/– dc4 9.Qd8 Nd8 10.Bc4 g6 (10...Nc6 11.0–0+/–) 11.0–0 Bg7 12.Bd3 Nc6 13.c4 0–0 14.c5 Rd8 (Black gets the initiative) 15.Rd1 Ne4 16.Bg7 Kg7 17.Be2 Rd1 18.Bd1 Bd7 19.Bc2 Nf6 20.Bd3 (20.Nbd2 Rc8+–) 20...e5+/– 21.Nc3 Rd8 22.Rd1 Be6 23.h3?? (better is 23.Bc2 Rd1 24.Bd1+/–) 23...e4=+ 24.Ne4 (24.Be4 Ne4) 24...Ne4–/+ (25.Ne1 g5–/+) 0–1. Rosner,Dirk – Wobick,R, corr SOK–89–51, 1989.

4.Be2 e6 5.a3 Bd6 6.f4 0–0 7.Nf3 h6 8.c4 dc4 9.Bc4 c5 10.bc5 Bc5 11.Nc3 Nc6 12.0–0 b5 13.Be2 b4 14.ab4 Bb4 15.Qb3 Rb8 16.Qa4 (16...Rb6 17.Rfc1=; < 16.Ba6 Na5 17.Ra5 Qa5=+). ranzpendang – narendras, internet, 2007.

4.Bf6 ef6 5.a3 Bd6 6.Nf3 Bg4 7.Be2 0–0 8.Nd4 Bd7 9.Bg4 Bg4 (9...Be5!?+=) 10.Qg4+= Kh8 11.Nf5 Rg8 12.Nc3 Be5 (better is 12...c6+=) 13.f4?? (13.d4 Bd6+/–) 13...Bd6 (better is 13...Bc3 14.dc3 Qd7+=) 14.Nd5 c5 (14...a5!? 15.Rb1 Bb4 16.Nb4 ab4 17.ab4 Qd7+/–) 15.0–0+– Bf8 16.c4 cb4 17.ab4 Nc6 18.b5 Nb4 19.b6?? (better is 19.Nb4 Bb4 20.ba6 ba6 21.d4+–) 19...Nd5= 20.cd5 Qd5 21.d4 Qc6 (21...Qe6 22.Qh3=) 22.Rab1 (22.Qf3 Qd7 23.g4 Bb4=) 22...a5 23.Rfc1 Qe4 24.Re1 a4 25.Ra1 (25.Ng3 Qd5=) 25...Ra6 26.Ng3 Qc6 27.Reb1 Qc3 Black plans a3 (better is 27...Rb6!? 28.Rc1 Qe8+=) 28.Qf3+= a3 29.Rc1 Qd2 Black prepares a2 30.Rc7 Qb2 31.Qd1 Qb6 32.Rc8 Qd6 33.Rb1 a2 34.Ra1 b5 35.Qb3 b4 36.Ne2?? Ra3–+ 37.Qc4 Qe7?? 38.Qc1? Re3–+ 39.Ng3 b3 40.Rb8 Rd3 41.Ra8 Rd4 42.Nf5 Rd1 43.Qd1 Qc5 44.Kh1 Qf5?? 45.Qb3+= Qf4 46.Qf3 Qd2 47.R8a2 Qd4 48.Rd1 Qe5 49.Ra8 Qe7 50.g4 g6 51.h4 Qe5 52.Rdd8+= Qe1 53.Kg2 Qe7?? 54.Re8+– Qd6 55.Rad8 Qb4 56.Re4 Qb2 57.Kg3 f5= 58.gf5?? Qf6 59.Rg4?? Qd8–+ 60.f6 Qc7 61.Kh3 Bh6 62.Re4 Qd7 63.Kg2 Qd2 64.Re2 Qb4 65.Re5 Qh4 66.Re7 Qg5 67.Kf1 Qc1 68.Kg2 Qd2 69.Kh3 Qa2 70.Qe3 Be3 71.Rf7 Qf7 72.Kg4 Qf6 73.Kg3 Qf2 74.Kg4 Qf4 75.Kh3 Qf1 76.Kg4 h5 77.Kg3 Rf8 78.Kh2 Rf2 79.Kg3 Qg2 80.Kh4 Rf4 0–1. Willi_weizenkeim – Ivofle, playchess.de, 2005.

4.a3 b5

5.d3 Bb7 6.Nf3 e6 7.Be2 h6 8.c4 bc4 (8...dc4 9.dc4 Qd1 10.Kd1 bc4 11.Nbd2=) 9.dc4+= Ne4 (9...c5 10.bc5 Nbd7 11.0–0+=) 10.cd5 ed5 11.Nd4 Bd6 (11...Qg5 12.0–0+=) 12.0–0 (12.Nf5 Rg8+/–) 12...Nd7 (12...Qg5 13.Nf3 Qg6 14.Qd4+=) 13.Nc3 (13.Nf5!? Be5 14.Be5 Ne5 15.Ng7 Kf8 16.Nh5+/–) 13...0–0 14.Ne4 de4 15.Bh5 (15.Nf5 Ne5+/–) 15...Nf6 (15...Qg5 16.Rc1=) 16.Be2 Re8 (16...Nd7 17.Nf5 Ne5 18.Qd4+=) 17.Bc4 Re7 (17...Bd5!? 18.Bd5 Nd5+=) 18.Nf5+/– Re8 19.Qd4 (19.Qb3 Rf8+/–) 19...h5? (better is 19...Be5!? 20.Qd8 Rad8=) 20.Nd6 (20.Rfd1 Be7+–) 20...Qd6+/– 21.Qd6 cd6 22.h3 d5 23.Bb3 g5?? (better is 23...Rac8+/–) 24.Bf6+– g4 25.hg4 hg4 26.Rac1 Re6 27.Bd4 a5 (27...Rb8 28.f3 gf3 29.gf3 Rg6 30.Kf2 ef3 31.Rc7+–) 28.Rc7 Ba6 (28...a4 29.Ba2 Rb8 30.Ba7+–) 29.Rfc1 (29.Bd5 Rae8 30.Be6 Re6+–) 29...ab4 (29...Rd8 30.ba5 Red6 31.R1c5+–) 30.ab4 (30.Bd5 Rae8 31.Be6 Re6 32.ab4 Rd6+–) 30...Bb5 (30...Bc4 31.Bc4 dc4 32.R1c4 Rb8+–) 31.Bd5 Rae8 32.Be6 fe6 (32...Re6 33.R1c5 Be8 34.Rh5+–) 33.Rb7 (33.Rg7 Kf8 34.Rcc7 Re7 35.Rge7 g3 36.Rf7 Ke8 37.Rce7 Kd8 38.Bb6 Kc8 39.Rf8 Be8 40.Rfe8) 33...Ba4 (33...e5 34.Rb5 ed4 35.Rg5 Kf7 36.ed4 Rd8+–) 34.Rbc7 Bb5 35.Rc8 (35.Rg7 Kh8 36.Rcc7 e5 37.Rh7 Kg8 38.Bc5 Bd7 39.Rcd7 Re7 40.Rhe7 g3 41.Re8) 35...Kf7 36.Re8 Be8 (36...Ke8 37.Kh2+–) 37.Rb1 (37.Rc7!? Kf8+–) 37...Bb5 38.Rc1 Kg6?? (38...Be8 39.Rc7 Kf8+–) 39.Rc5+– Bd3 40.b5 Kf7 (40...g3 41.b6 Ba6 42.fg3+–) 41.b6 Ke7 42.b7 Kd6 (42...Ba6 43.Rc7 Kd6 44.b8Q Bc8 45.Rc8 Kd5 46.Qe5) 43.b8Q Ke7 (43...Kd7 44.Rc7 Kd6 45.Qd8) 44.Rc7 Kd6 45.Qd8 1–0. dsteel (2100) – valerypavlovich (2175), net–chess.com, 2016.

5.d4 Nbd7 6.Nd2 Nb6 7.Rc1 Bb7 8.Ngf3 e6 9.Bd3 Ne4 10.Be4 de4 11.Ne5 f6?? (better is 11...Qg5 12.Qg4 Qg4 13.Ng4 a5 14.ba5 Na4–/+) 12.Qh5+– Ke7 13.Ng6! hg6 14.Qh8 Kf7 15.Qh4 Be7 16.Qg4 (16.Ne4?! Nc4 17.Nd2 Nb2+=) 16...Qd5 17.Qe2 (17.c4 bc4 18.0–0 a5+/–) 17...Rh8? (better is 17...Qa2 18.Rb1 Nc4=) 18.c4+– bc4 19.Nc4 Na4 20.Ba1 Bc6 21.Qc2 Bb5 22.Nd2 Qg5 (22...Nb6 23.Bb2+– (23.Qc7 Rc8 24.Qc8 Nc8–+; 23.Ne4?! f5+/–)) 23.Qe4 Rh4 24.Qf3 Nb6 25.Rc7 Nd5 26.Ne4 (better is 26.Rc1!? Qh5 27.h3 Qf3 28.Nf3 Rh8+–) 26...Re4 27.Re7! (27.Qe4?! Nc7 28.Bb2 Bd6+=) 27...Ke7 (27...Ne7 28.Qe4 Zwischenzug; 27...Ke7 28.Qe4 Zwischenzug) 28.Qe4 Qh5 29.Qf3 Qh8 (29...Qf3 30.gf3 Nb6 31.Bb2+–) 30.Kd2 Qe8 31.e4 Nb6 32.Rc1 Nc4 (32...Qb8 33.e5+–) 33.Ke1 f5 (33...Qb8 34.e5! Nb6 35.Qe4+–) 34.ef5 gf5 35.Qg3 (35.Qb7 Qd7 36.Qd7 Kd7+–) 35...Qh5 (35...Qc6 36.Qg7 Ke8 37.d5 ed5 38.Rc2+–) 36.Rc4! Bc4 37.Qc7 Kf6 (37...Kf8 38.Qc4 Qh2 39.Qa6 Qg2 40.Qd6 Kf7 41.Bb2 Qe4 42.Kd2+–) 38.Qc4 (38.Qc4 Qh2 39.Qa6 Qg2 40.d5 Kg5 41.de6 Qh1 42.Qf1 Qe4 43.Kd2 Qd5 44.Kc2 Qe6 45.Bg7 Qc6 46.Kd2+–) 1–0. Haisma,Henk (1720) – Verweij,Florian (1625), Groningen Compact op–C, 2008.

5.Nf3 Nc6 6.d3 g6 7.c4 (White gets in control) 7...Bg7 8.cb5 ab5 9.d4 Bf5? (better is 9...Na7+=) 10.Bb5+– Bd7 11.Qc2 Na7 12.Bd7 Qd7 13.0–0 0–0 14.Rc1 Rfc8 15.Ne5 Qe8 16.Nd2 c6 17.Nb3 Rc7 (17...Ne4 18.f3 Nd6 19.Na5+–) 18.Nc5 Nb5 19.a4 Nd6 20.Ncd3 Rac8 21.a5 Nb5 22.Nc5 Ra7 23.Bc3 Qd8 24.Be1 Ne8 25.Na4 Be5 26.de5 Ng7 27.Nb6 Rcc7 28.f3 e6 29.Qd2 Nf5 30.Bf2 Ne7 (30...Qg5 31.f4 Qh6 32.e4 de4 33.Rc4+–) 31.e4 Ra6 32.Na4 d4 (32...Qe8 33.Qg5+–) 33.Nc5 Ra8 34.Rc4 Nc3 (34...Rcc8+–) 35.Rd4 (35...Ncd5 36.Bh4+–) 1–0. Skaza,Adam (1800) – Ciesielski,Stefan (1800), corr Poland, 1998.

5.Nf3 e6 6.Ne5 =.

4.a4 Nc6

5.b5= ab5 6.ab5 Ra1 7.Ba1 Na5 8.Bd4 b6 (8...Bg4 9.Be2 Bf5 10.Nf3+=) 9.Nf3+= Bg4 10.Be2 e6 11.Ne5 Be2 12.Qe2 Bd6 13.Nc3 (13.f4 Be5 14.fe5 Ne4=) 13...Qe7 (13...Be5 14.Be5 0–0 15.0–0=) 14.0–0 0–0 (14...Be5 15.Be5 Nc4 16.Ra1+/–) 15.Na4 (15.e4 Rd8+=) 15...Rc8 (15...Nd7 16.Nd7 Qd7 17.Qg4=+) 16.Ra1 (16.f4 Ra8=) 16...h6 (16...Be5 17.Be5 Nc4 18.f4=) 17.f4 c5 (17...Qe8 18.Nc3+=) 18.bc6 (18.Nb6 Rb8 19.Ra5 cd4+–) 18...Nc6 19.Nc6 Rc6+= 20.Nb6 Bc5 21.Bf6 Qf6 22.Ra8 Kh7 23.Nd7 Qe7? 24.Qd3 g6 25.Ne5 Rd6 26.Qc3 Bb6?? 27.Nc6 d4 28.Qd4?? Bd4?? 29.Ne7+– Bb6 30.Nc8 Rd2 31.Nb6 Rc2 32.Ra3 Kg7 33.Nd7 Rd2 34.Ne5 h5 35.Ra7 Re2 36.Rf7 Kh6 37.Rf6 Re3 38.Re6 Re4 39.Nf7 Kg7 40.Re4 Kf7 41.Kf2 Kf6 42.Kf3 Kf5 43.Re5 Kf6 44.g4 hg4 45.Kg4 Kf7 46.h4 Kg7 47.h5 Kh6 48.hg6 Kg6 49.Rg5 Kf6 50.f5 Ke7 51.Rg6 Kf7 52.Kg5 Ke7 53.f6 Kf8 54.Rh6 Kf7 55.Rh7 Kg8 56.Kg6 Kf8 57.Rh8# 1–0. Madel,K – Rehak,Martin (2230), Plzen KB op–B U18, 1997.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Na7 8.c4 c6 9.Nc3 (9.Qa4 Qb6+=) 9...dc4 (9...e5 10.d4 ed4 11.Qd4=) 10.Bc4 cb5 11.Nb5 Nb5 12.Bb5 Bd7 13.Bc4 (13.Bd7 Qd7 14.Nf3 Nd5=) 13...b5 (13...e6 14.Nf3=) 14.Bb3 (14.Be2 Bc6 15.Nf3 e6=) 14...e6 (14...Bc6 15.Nf3=) 15.Nf3= Bd6 16.0–0 0–0 17.d3 Qb8 (17...Ng4 18.h3 Nh6 19.Qe2=) 18.h3 (18.Bf6 gf6 19.Qa1 e5+=) 18...Bc6 (18...e5 19.Qe2=) 19.Nd4 (19.Bf6 gf6 20.Nd4 Rc8+=) 19...Bd5 (19...Ba8 20.Qe2=) 20.e4 (20.Bd5 Nd5 21.Qg4 Nf6+=) 20...Bb3 (20...Ba8!?=) 21.Qb3+= b4 22.e5 (better is 22.Nc2=) 22...Bc5?? (better is 22...Be5 23.Nc6 Bh2 24.Kh1 Qd6 25.Bf6 gf6 26.Qb4 Qb4 27.Nb4 Be5=) 23.ef6+– Bd4 (23...gf6 24.Nc2+–) 24.Bd4 g6 (24...Rd8 25.Bc5+–) 25.Bc5 (25.Rb1 Qb5+–) 25...Rc8 26.d4 (26.Qb4!? Qb4 27.Bb4 Rc2+–) 26...Qf4 27.Qb4 Qf6 28.Bd6 Qd8 29.Ra1 Rc6 (29...Ra8 30.Ra8 Qa8 31.Be5+–) 30.Bc5 (better is 30.Be5+–) 30...Qd5 (30...Rc8+–) 31.Ra8 Kg7 32.Bf8 Kf6 33.Qe7 (33...Kf5 34.Qf7 Ke4 35.Qf3 Kd4 36.Ra4 Qc4 37.Bg7 Kc5 38.Rc4 Kc4 39.Qc6 Kb4 40.Be5 Ka3 41.Qe6 Kb4 42.Qe7 Kc4 43.Qh7 g5 44.Qg8 Kc5 45.g4 Kc6 46.Kg2 Kc5 47.Qg5 Kc6 48.Qf6 Kb5 49.f4 Kc5 50.f5 Kb5 51.g5 Kc5 52.Qd6 Kb5 53.f6 Kc4 54.f7 Kb5 55.g6 Kc4 56.g7 Kb5 57.Qd5 Kb6 58.Qb3 Kc6 59.f8Q Kd7 60.Qd5#) 1–0. Fredek (2090) – Guest541622, Freundschaftspartie, 5m + 0s, 2005.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Na7 8.Nf3 Bg4 9.Bf6 ef6 10.c4 dc4 11.Bc4 Bd6 12.0–0 0–0 13.h3 Be6 14.d3 Qd7 15.Nd4 Rd8 16.Ne6 fe6 17.Qb3 Kf7 18.Nc3 Nc8 19.Ne2 Ke7? 20.Re1 e5 21.f4 Qf5 22.e4 Qh5 23.Ng3 Bc5 24.Kh2 Qg6 25.Nf5 Kf8 26.fe5 fe5? 27.Rf1+– Qg5 28.Nd6 Ke7 29.Nf7 Qh5?? 30.Nd8 Kd8 31.Rf8?? Bf8–+ 32.Bf7 Qh6 33.Qd5 Nd6 34.Be6 Qf4 35.Kh1 Be7 36.Bg4 Bg5 37.Qg8 Ne8 38.Qd5 Ke7 39.Qe6 Kf8 40.Qf5 Qf5 41.Bf5 g6 42.Be6 Nd6 43.Bc4 Nc4 44.dc4 Ke7 45.Kg1 Kd6 0–1. hal1958 – treebeard, HCL–A1536 playchess.de, 2003.

4.a4 Bd7

5.Nf3 e6 6.c3 c5 7.bc5 Bc5 8.c4 dc4 9.Bc4 Nc6 10.0–0 0–0 11.d4 Be7 12.Nc3 Rc8 13.Ba2 Na5 14.Ne5 Re8 15.Rc1 Nc6 16.f4 Nb4 17.Bb3 Nfd5 18.Nd5 Nd5 19.Bd5 (better is 19.Qh5!? Rf8 20.Qh3 Rc1 21.Rc1+=) 19...ed5 20.Qb3 Bc6 21.Ba3 f6 22.Nc6 bc6 23.Bc5 Bc5 24.Rc5 (worse is 24.dc5 Rb8 25.Qc3 Re4–/+) 24...Qe7 25.Re1 Qc7 26.Kf2 f5 27.Rec1 Re6? (better is 27...Qd7+=) 28.Rd5! g6?? (28...cd5 29.Qd5 Double attack (29.Rc7 Pinning; 29.Rc7 Deflection; 29.Rc5 Decoy; 29.Rc7 Clearance)) 29.Re5 1–0. Lauko,Marian (1885) – Kral,Ladislav, Tabor op, 2007.

5.Nf3 e6 6.c3 Nc6 7.d4 b5 (7...Bd6 8.Bd3=) 8.a5 (better is 8.ab5 ab5 9.Ra8 Qa8 10.Bb5+/–) 8...Bd6= 9.Nbd2 Ne4 10.Bd3 f5 11.Qc2 Ng5 12.Ke2 Nf3 13.Nf3 e5 14.de5 Be5 15.Bf5 Bf5 16.Qf5 Qf6 17.Qf6 Bf6 18.Rab1 0–0–0 19.Rhd1 Rhe8 20.Kf1 Ne5 21.Ne5 Be5 22.Rd2 c6 23.Rbd1 Bh2 24.g3 Re6? (better is 24...Bg3!? 25.fg3 Re3+/–) 25.Kg2+– Rh6 (better is 25...Bg3 26.Kg3 Rf8+–) 26.Rh1 Bg3 27.fg3 (better is 27.Rh6 gh6 28.Kg3+–) 27...Rh1 28.Kh1 Rf8 29.Kg2 Kd7 30.e4 Ke6 31.ed5 cd5 32.Re2 Kd6 33.Bc1 h6 34.Bf4 Kd7 35.Re5 Kc6 (35...g5 36.Be3 Re8 37.Rd5 Ke6+–) 36.Re6 Kb7 37.Re7 Kc6 (37...Kc8 38.Rg7 Rf6 39.Rc7 Kd8 40.Rc5+–) 38.Rg7 (38.Rc7) 38...h5 (38...d4 39.Rg6 Kd5 40.Rd6 Kc4 41.Bh6 Ra8 42.Rd4 Kc3+–) 39.Rc7 1–0. nbh999 (2040) – Ramesh 2.0, ChessWorld.net, 2003.

4.a4 e6

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4).

5.b5 ab5 6.ab5 Ra1 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1).

4.c4 dc4

5.Bc4 b5 6.Be2 Bb7 7.Nf3 e6 8.a3 c5 9.bc5 Bc5 10.0–0 0–0 11.h3 Nbd7 12.Ne5? (better is 12.d4!? Bd6 13.a4+=) 12...Ne5–+ 13.Be5 (better is 13.d4 Qd5 14.f3–+) 13...Qd5 14.Bf3 Qe5 15.d4 Bf3 16.de5? (16.Qf3 Bd4! 17.ed4 Qd4 18.Nc3–+) 16...Bd1 17.Rd1 Nd5 18.Kf1 Rfd8 19.Rc1 Rac8 20.Nd2 (20.Ke2 Be7 21.Rc8 Rc8–+) 20...Ne3! 21.Ke2 (21.fe3 Rd3 Double attack (21...Rd2 Discovered attack; 21...Rd3 Decoy)) 21...Ng2 22.Ne4 Bb6 23.Nd6 Bd4 (better is 23...Rc1!? 24.Rc1 Nf4 25.Kf1–+) 24.Rc8 Rc8 25.Rd1 Rc2 26.Kd3 (26.Kf3 Nh4 27.Kg4 Be5 28.Kh4 Rf2 29.Nc4 Rf4 30.Kg3 Rc4 31.Kf2–+) 26...Rc3 (better is 26...Rc5 27.Ne4 Rd5–+) 27.Kd4 Ra3 28.Kc5 Kf8 29.h4 (29.Kb4 Ra4 30.Kb3 f6–+) 29...h6 (29...Nh4 30.Kb4 Ra4 31.Kb3–+) 30.Kc6 (30.Rc1–+) 30...Nh4 31.Nb7 g5 32.Rd8 Kg7 33.Nd6 (33.Nc5 Nf3 34.Kb6 b4–+) 33...Nf3 34.Ne8 Kg6 35.Kb6 Ne5 36.Nc7 Nc4 (36...b4 37.Kc5 Rc3 38.Kb6–+) 37.Kb7 (37.Kc5 Nb2 38.Kb6 b4 39.Na6 b3–+) 37...b4 38.Na6 (38.Rg8 Kf6 39.Rh8 b3 40.Rh6 Kf5–+) 38...b3 39.Rd1 b2 40.Rb1 Ra1 41.Rb2 Nb2 0–1. Wiedermann,Jan (1740) – Sroubova,Lenka, Karlovy Vary op, 2009.

5.Bc4 e6 6.Nf3 Nc6 7.a3 Be7 8.0–0 0–0 9.d3 b5 10.Bb3 Bb7 11.Nc3 Qd7 12.Qe2 Rad8 13.Rad1 Bd6 14.e4 Bf4 15.Qc2 Qd6 (15...Ne5 16.Ne1=) 16.Ne2 Bh6?? (better is 16...Ne5 17.Be5 Be5+=) 17.e5+– Ne5 18.Be5 Qc6 19.Qc6 Bc6 20.Bc7 Rc8 21.Be5 Nd5 22.Bb2 Bb7 23.Ne5 Rc7 24.Bc1 Bc1 25.Rc1 Rfc8 26.Rc7 Rc7 27.Rc1 Rc1 28.Nc1 Nf4 29.g3 Nd5 30.Bd5 Bd5 31.Nd7 Bc6 32.Nc5 Kf8 33.Na6 h5 34.Ne2 g5 (34...Ke7 35.Nc5+–) 35.Nd4 Bd5 36.Nc7 1–0. Hal1958 – Goathed, playchess.de, 2005.

4.c4 c6

5.Qb3 Bf5 6.Nf3 e6 7.Be2 Bd6 (7...dc4 8.Qc4 Nbd7 9.0–0=) 8.Be5 (8.c5 Bc7=) 8...0–0 9.0–0 Bg4 10.Bd6 Qd6 11.d4 Nbd7 12.h3 Bh5 13.Nc3 Ne4 14.c5 Qe7 15.Rfe1 f5 16.Ne4 fe4 17.Ne5 (17.Nd2!? Qh4 18.Bh5 Qf2 19.Kh1 Qd2 20.Be2=+) 17...Ne5 18.Bh5 (18.de5 Qg5–/+) 18...Nd3 19.Re2 (better is 19.Rf1 Qh4 20.Qd1 Nf2 21.Qe2–+) 19...Qh4–+ 20.Bg4 Rf2 21.Be6 (21.Qd3 Rg2!! (21...ed3?! 22.Rf2 Qh6 23.Re1–+) 22.Rg2 ed3–+) 21...Kh8 22.Qc2 (22.Rf2 Qf2 23.Kh2 Qe3 24.Rb1–+) 22…Raf8 (23.Bd5 cd5 24.Rf2 Rf2–+; 22...Nb4?! 23.Qd2 Re2 24.Qe2–/+) 0–1. Basel,Karem – Adnani,Moklis, Arab–ch U18 Beirut, 2000.

5.cd5 cd5

6.a3 A) 6...Nc6 7.Bf6 (7.Nf3 Bg4 8.Be2 e6 9.0–0 Bd6 10.h3 Bf3 11.Bf3 0–0=; 7.Be2 e5 8.Nf3 Bd6 9.d4 e4 10.Ne5 Qc7 11.Nc6 bc6=; 7.b5 ab5 8.Bb5 e6 9.Nf3 Bd6 10.0–0 0–0 11.Qe2 Bd7+=) 7...ef6 8.d4 Bf5 9.Bd3 Bd3 10.Qd3 Rc8 11.Nc3 Qd6+=; B) 6...Nbd7 7.d4 (7.Nf3 e6 8.Be2 Bd6 9.0–0 0–0 10.Nc3 Qe7 11.Qb3 b5=) 7...e6 8.Bd3 Bd6 9.Nf3 a5 10.b5 0–0 11.0–0 Qe7=; C) 6...e6 7.Nc3 (7.Be2 Bd6 8.Nf3 0–0 9.0–0 Nc6 10.Nc3 e5 11.d4 e4+=; 7.Bd3 Bd6 8.Nf3 Nc6 9.0–0 e5 10.Be2 Qc7 11.Ne1 Be6+=; 7.Nf3 Bd6 8.Be2 0–0 9.0–0 Nc6 10.Nc3 e5 11.d4 e4+=) 7...Bd6 8.Rc1 0–0 9.Nf3 e5 10.Qb3 Bc7 11.Qa4 Bd7=.

6.Be2 A) 6...Bf5 7.Nf3 (7.a3 Nc6 8.Nf3 Qd6 9.0–0 Rc8 10.b5 ab5 11.Bb5 Bg4=; 7.b5 e6 8.Nf3 Bd6 9.ba6 Na6 10.Bb5 Kf8 11.0–0 Kg8=; 7.Bf6 ef6 8.a3 Nc6 9.d4 Rc8 10.Nf3 Bd6 11.Qb3 a5=) 7...Nc6 8.a3 Qd6 9.0–0 Rc8 10.b5 ab5 11.Bb5 Bg4=; B) 6...Nc6 7.b5 (7.a3 e5 8.Nf3 Bd6 9.0–0 0–0 10.d4 e4 11.Ne5 Qc7+=; 7.Bf6 gf6 8.a3 Rg8 9.g3 e5 10.d4 Be6 11.Nc3 Rc8+=) 7...ab5 8.Bb5 e6 9.Nf3 Bd6 10.0–0 0–0 11.Qe2 Bd7=; C) 6...e6 7.a3 Bd6 8.Nf3 0–0 9.0–0 Nc6 10.Nc3 e5 11.d4 e4+=.

6.Nf3 Qd6 7.Qa4 (7.Qb3 Bf5 8.Be5 Qe6 9.Nc3 Nc6 10.d4 Qd7 11.Bf6 ef6+=; 7.a3 Nc6 8.b5 ab5 9.Bb5 Bg4 10.d3 Ra5 11.a4 Nd7=; 7.b5 Nbd7 8.Be2 e5 9.ba6 ba6 10.Ba3 Qe6 11.Bf8 Rf8=) 7...Bd7 8.b5 Ne4 9.Nc3 Nf6 10.Ba3 Qb6 11.d4 Qe6 +=.

6.Nf3 Nc6 7.a3 (7.b5 ab5 8.Bb5 Bg4 9.h3 Bd7 10.Bf6 gf6 11.Nc3 e6=) 7...Qb6 (7...Bf5 8.b5 (8.Be2= Qd6 9.0–0 Rc8 10.b5 ab5 11.Bb5 Bg4=) 8...ab5 9.Bb5 Ne4 10.0–0 Nd6 11.Bc6 bc6=; 7...Bg4 8.Be2 e6 9.0–0 Bd6 10.h3 Bf3 11.Bf3 Rc8=) 8.Bf6 (8.Be2 Bf5 9.Bf6 gf6 10.Nc3 e6 11.d4 Bd6=) 8...ef6 9.d4 Bd6 10.Be2 (10.Bd3 Be6 11.Nc3 Rc8+=) 10...0–0 (10...Be6 11.Nc3 Rc8=) 11.0–0 (11.Nc3 Be6=) 11...Bf5 (11...Be6=) 12.Nc3 Rac8 13.Nd5 Qd8 14.Nf4 g5 (14...Bf4 15.ef4 Qd6 16.Re1=) 15.Nd3+/– a5 16.Nc5 Bc5? (better is 16...ab4!? 17.Nb7 Qe7 18.Nd6 Qd6+/–) 17.bc5+– (17.dc5?! ab4 18.ab4 Qd1 19.Rfd1 Nb4+=) 17...Qd5 18.Nd2 Bg6 (18...Rfd8 19.Nc4 Rc7 20.Qd2+–) 19.Bf3 Qd7 20.Nc4 Rb8 21.Nb6 Qd8 22.Qa4 Bd3 (22...Kg7 23.Bc6 bc6 24.Qc6+–) 23.Rfd1 Ba6 24.Bc6 bc6 25.Qc6 Bb7 26.Qd7 Qe8 (26...Be4 27.d5+–) 27.Qe8 Rfe8 (27...Rbe8 28.Nd7 Rd8 29.Nf8 Kf8 30.Rab1+–) 28.Nd7 Rbd8 (28...Be4 29.Nf6 Kf8 30.d5+–) 29.Nf6 Kf8 30.Ne8 Ke8 31.Rab1 (31.Rab1 Be4 32.Rb5+–) 1–0. pzn2pawn (1855) – Donidon (1945), redhotpawn.com, 2016.

6.Nf3 e6 7.Qa4 (7.a3 Bd6 8.Be2 0–0 9.0–0 Nc6 10.Nc3 e5 11.d3 Bg4=) 7...Bd7 8.b5 Bd6 9.Be2 0–0 10.0–0 Qe7 11.Be5 Ne4 =.

6.Nf3 Bg4 7.h3 (7.Be2 e6 8.a3 Bd6 9.0–0 0–0 10.Nc3 Nc6 11.h3 Bf3=; 7.a3 e6 8.h3 Bh5 9.g4 Bg6 10.Ne5 Nbd7 11.Ng6 hg6=; 7.b5 e6 8.Nc3 Bd6 9.ba6 Na6 10.Bb5 Nd7 11.h3 Bh5=) 7...Bh5 8.g4 Bg6 9.Ne5 Qd6 10.Qa4 Nbd7 11.g5 Ng8 +=.

6.Bf6 A) 6...ef6 7.a3 (7.Qa4 Bd7 8.b5 Bc5 9.Nc3 d4 10.Ne4 Qe7 11.Nc5 Qc5=; 7.Qb3 Nc6 8.a3 Be6 9.d4 Rc8 10.Nc3 Bd6 11.Nf3 a5=) 7...Bd6 8.Qf3 Be6 9.Nc3 d4 10.ed4 Qe7 11.Qe3 Nd7=; B) 6...gf6 7.Nf3 (7.a3 e5 8.d4 Nc6 9.Nc3 Be6 10.Nf3 Rc8 11.Qb3 Bd6=; 7.d4 e5 8.a3 Nc6 9.Nc3 Be6 10.Nf3 Rc8 11.Qb3 Bd6=; 7.Nc3 Nc6 8.a3 e5 9.d4 Be6 10.Nf3 Rc8 11.Qb3 Bd6=) 7...e5 8.a3 Nc6 9.d4 Bg4 10.Nc3 ed4 11.ed4 Rc8=.

4.c4 e5

5.c5 Nc6 6.a3 (6.Nf3 Bg4=+) 6...Bf5 (6...Be7 7.Nf3 e4 8.Ne5=+) 7.Nf3 Bg4 (7...e4 8.Nd4 Nd4 9.Bd4=) 8.Be2 (8.h3 Bf3 9.Qf3 Qd7=) 8...Bf3 (8...e4 9.Ne5 Be2 10.Qe2 Ne5 11.Be5=) 9.Bf3= e4 10.Be2 Be7 (10...d4 11.ed4 Nd4 12.0–0=) 11.d3+= Qd7 (11...0–0 12.0–0+=) 12.de4 Ne4 (12...de4 13.Qd7 Nd7 14.Nc3+/–) 13.0–0 (13.Bg4 f5 14.Bh5 Kf8+=) 13...Bf6+= 14.Bf6 gf6 (14...Nf6 15.Re1+=) 15.Bg4 (15.f3 Ng5+=) 15...f5+= 16.Bf3 (16.Be2 d4+=) 16...0–0–0= 17.Nd2 (17.Qe2 d4=) 17...Rdg8 (17...Rhe8 18.Qc2=) 18.Nb3+= f6 (18...Ne5 19.Rc1+=) 19.Kh1 (19.Re1 Rg7+=) 19...Ne5 20.Be2 (20.Rc1 c6+=) 20...Qg7 (20...Rg2 21.Kg2 Rg8 22.Kh1=) 21.g3 h5 (better is 21...Nc3 22.Qd2 Ne2 23.Qe2 Qg4=) 22.Bh5?? (22.Qd5 h4 23.Na5=+) 22...Nc3 23.Qc2 Rh5 24.Qc3 (24.Nd4 Rgh8 25.f3 Qg3 26.Rf2–+) 24…Qg4 (25.Qe5 fe5–+; 24...Nf3 25.h4 Rh4 26.Kg2 Rh2 27.Kf3 Qg4#) 0–1. uno (1860) – METHUSALAH (1990), ICC, 2003.

5.Be5 Nc6 6.Bc3 Bb4 7.Bb4 Nb4 8.Qa4 Nc6 =+.

5.Be5 Nc6 6.Bc3 Nb4 7.Bb4 Bb4 8.Qa4 b5 9.Qb4 dc4 10.a4 +–.

4.c4 Bg4

5.Qa4 Bd7 6.Qc2 e6 7.c5 Nc6 8.a3 b5 (8...e5!?+=) 9.Nf3= Be7 10.Be2 0–0 11.0–0 a5 12.Bb5 (12.Qb3 Na7+=) 12...ab4?? (better is 12...Nb4 13.ab4 Bb5+=) 13.ab4?? (better is 13.Bc6!? Bc6 14.ab4 Ra1 15.Ba1+=) 13...Ra1?? (better is 13...Nb4 14.Qc3 Bb5 15.Qb4 Bf1 16.Kf1 Ra1 17.Ba1 Qb8 18.Qb8 Rb8–+) 14.Ba1+= Nb4 15.Qa4 Bb5 (15...Bc5? 16.Bf6 Qf6 17.Bd7+–) 16.Qb5 Nd3?? (better is 16...Qb8 17.Qe2 Bc5 18.Bf6 gf6+=) 17.Bf6+– Bf6 18.Qd3 c6 19.Qa6 Qc7 20.d4 h6 21.Nc3 Rb8 22.Na4 g5 23.Nb6 g4 24.Nd2 e5 25.Nb3 h5 26.g3 e4 27.Nc1 h4 28.Ne2 h3 29.Ra1 Rb7 30.Qa8 Kg7 31.Qc8 Qc8 32.Nc8 Rb5 33.Na7 Rc5 34.dc5 Ba1 35.Nc6 Kf6 36.Ncd4 Ke5 37.Kf1 f5 38.c6 Kd6 39.Ke1 Bb2 40.Kd2 Ba3 41.Nb5 Kc6 42.Ned4 Kc5 43.Na3 Kb4 44.Nac2 (44.Nac2 Kc4 45.Nf5+–) 1–0. Hal1958 – SMLooking, playchess.de, 2005.

5.Qc2 Nbd7 6.cd5 (6.f3 Be6=) 6...Nd5=+ 7.a3 e6 8.Nc3 N7f6 9.Bd3 Be7 10.Nge2 Rc8 11.b5 ab5 12.Nd5 (12.f3!? Bf5 13.e4 Nc3 14.Nc3=) 12...Qd5–/+ (< 12...Nd5 13.Bg7 Rg8 14.Bb5 c6 15.Qh7+–; 12...ed5?! 13.Bb5 c6 14.Bd3=) 13.Nf4 Qc6 (13...Qd7 14.h3 Bf5 15.Bf5 ef5 16.0–0=+) 14.Rc1 (better is 14.Qc6!? bc6 15.h3=) 14...Qc2–/+ 15.Rc2 c6 16.Bb5 e5 17.Bc6? (17.Be5 cb5) 17...Rc6–+ 18.Rc6 bc6 19.Be5 0–0 20.a4 Ra8–+ 21.0–0 Ra4 22.h3 Bf5 23.Rc1 c5 24.Bf6 Bf6 25.Rc5 Be6 (26.d4 Ra1 27.Kh2 g5 28.Ne6 fe6–/+) 0–1. Gross,Wilhelm – Merten,Rainer, GER theme m Germany, 1988.

5.Nf3 Nbd7 6.cd5 Nd5 7.a3 e6 8.Bc4 N5f6 9.d4 Be7 10.Nbd2 0–0 11.0–0 Nb6 12.h3 (12.Bd3!?+=) 12...Nc4= 13.Nc4 Bh5 14.Nce5 Ne4 15.Qd3 (15.Qc2 Nd6=) 15...Qd5=+ 16.g4 Bg6 17.Ng6 hg6 18.Rac1 (18.Ne5 Bd6 19.Qc4 Rfe8=) 18...Rac8 (18...c5 19.bc5 Nc5 20.Qe2=+) 19.h4 (19.Ne5 a5=) 19...Nd6 (19...c5 20.bc5 Nc5 21.Qd1–/+) 20.Qe2 f5 (20...b5 21.Rfd1=) 21.g5 (21.Ne5 Kh7+= (21...Bh4? 22.Ng6 Bd8 23.Rc5+–)) 21...f4 (21...Qe4=) 22.ef4?? (better is 22.Rc5 Qa2 23.Qc2 fe3 24.Ra1 Qa1 25.Ba1 Rf3 26.fe3 Re3 27.Qg6+/–) 22...Rf4–+ 23.Ne5 Rh4 24.f3 Bg5 (24...Nf7 25.Ng6 Qg5 26.Qg2–/+) 25.Ng6?? (better is 25.Rc5 Qb3 26.Ng6 Be3 27.Kg2+=) 25...Rh6–/+ (25...Rd4?! 26.Rc5 Rd2 27.Qe1 Rb2 28.Rd5 ed5 29.Qe5+=) 26.Rc5 Rg6 27.Rd5 ed5 28.Rf2 Re8 29.Qd3 Re1 30.Kg2? (30.Rf1 Ree6 31.Rf2 Nc4–+) 30...Kf7 (better is 30...Ne4 31.fe4 Bh4 32.Kh2 Bf2–+) 31.f4?? (better is 31.Re2 Re2 32.Qe2 Bf4 33.Kh1 Rh6 34.Kg1–+) 31…Bh4 (32.Qg6 Kg6–+) 0–1. Gross,Wilhelm – Merten,Rainer, xii/25, 1985.

4.Nf3

4.Nf3 (--> 3.Nf3 a6 4.e3).

4.Nf3 e6 5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

3.e3 b6

4.b5 Bg4 5.Nf3 Bd7 6.c4 dc4 7.Bc4 Be6? (better is 7...e6!?+=) 8.Be6+/– fe6 9.Nc3 Nbd7 (9...a6 10.Qa4+–) 10.Ba3 (10.Ng5 Qc8+–) 10...h6 (10...a6 11.Ng5 Qc8 12.Qb3+/–) 11.0–0 g5 (11...a6 12.Nd4 Ne5 13.Ne6+–) 12.Nd4 Nd5?? (better is 12...Ne5+–) 13.Qh5 1–0. Speedy – wernt, internet, 2017.

4.c4 Bb7 5.Nf3 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

4.c4 c5 5.bc5+= bc5 6.Bf6 ef6 7.cd5 (7.Nc3 d4 8.Qf3 dc3 9.dc3 Nc6 10.Qc6 Bd7 11.Qe4 Be7+=) 7...Qd5= 8.Nc3 Qd8?? (better is 8...Qd7=) 9.Qa4+– Bd7 (9...Nc6 10.Bb5 Rb8 11.Bc6 Bd7+–) 10.Qe4 Be7 11.Qa8 1–0. poesimannen (2125) – frodan (1760), gameknot.com, 2013.

4.Nf3 e6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3).

4.Nf3 g6 5.Be2 Bg7 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 b6).

4.Bf6 ef6 5.c3 Bb7 6.d4 Nd7 7.Nd2 Bd6 8.Bd3 Qe7 9.Ne2 g6 10.h4 (10.0–0 0–0+=) 10...h5 11.g3 f5 12.Qc2 Nf6 13.0–0 Ne4 14.a4 a6 15.a5 b5 16.Nb3 (16.Kg2 g5 17.Nf3 f6+=) 16...f6 (16...g5!? 17.hg5 Qg5–/+) 17.Kg2 g5 18.Rh1 Bc8 (18...f4 19.ef4 gf4 20.Rhe1+=) 19.Nc5 Bc5 (19...Qg7 20.hg5 (worse is 20.Ne4 fe4 21.Be4 de4 22.Qe4 Kf7+=) 20...fg5 21.f3= (worse is 21.Ne4 fe4 22.Be4 de4 23.Qe4 Kf7+=)) 20.dc5 c6 (20...Bd7 21.Nd4 Qe5 22.c6=) 21.Nd4+/– Bd7 22.f3 gh4 23.fe4 (23.Rh4 Ng5+/–) 23...h3 24.Kh2 (24.Kf2!? fe4 25.Bf1+/–) 24...fe4= 25.Bf1 h4 26.Qf2 Qe5 27.Qf4 0–0–0? (27...hg3 28.Qg3 Ke7 29.Ne2+=) 28.gh4 (better is 28.g4+/–) 28...Rh4= 29.Qg3 Rg8 30.Qe5 fe5 31.Ne2 Bg4 32.Rg1 Rf8?? (better is 32...Kc7=) 33.Rg4!+– Rg4 34.Bh3 Rf2?? (better is 34...Rh8 35.Rg1 Rh3 36.Kh3 Rg1 37.Ng1 Kd7+–) 35.Kh1 Re2 (35...Kd8 36.Bg4 Kc7+–) 36.Bg4 (36.Bg4 Kd8 37.Be2+–) 1–0. orangutandu – poutu54, internet, 2012.

4.c4 e6

5.b5 Be7 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.c4 b6).

5.Nf3 Bb7 6.Qb3 a6 7.Be2 Bd6 8.Nc3 Ne4 (8...dc4 9.Qc4 Nbd7 10.d4=) 9.Ne4 (better is 9.cd5!? ed5 10.Nd5+=) 9...de4+= 10.Ne5 (10.Nd4 Nd7+=) 10...Be5 (better is 10...f6!? 11.Qa4 b5 12.cb5 fe5 13.ba6 c6–/+) 11.Be5= f6 12.Bc3 e5 13.0–0 Bc8 14.c5 b5 (14...Ra7!?+=) 15.a4 Bd7? (better is 15...ba4 16.Qa4 c6+–) 16.ab5+– Qe7 (16...Ra7 17.ba6 c6 18.d4 ed3 19.Bd3+–) 17.ba6 Be6 18.Bc4 Bc4 19.Qc4 Nd7 20.Qe4 0–0 21.Qc4 Kh8 22.Rfb1 Rfb8 23.d4 c6 24.d5 cd5 25.Qd5 h6 26.Rd1 Rd8 27.Qd6 Qd6 (27...Qe8 28.a7 Kh7 29.b5 Nc5 30.Qc5+–) 28.Rd6 Kh7 29.Rad1 Ra7 30.b5 (30.b5 Rb8 31.Rd7 Rd7 32.Rd7 Rb5 33.f4 Rc5 34.a7+–) 1–0. orangutanb4 (2025) – adighyzu (1920), internet, 2011.

4.Nf3 Bb7

5.a3 Nbd7 6.c4 dc4 7.Bc4 c5 8.0–0 e6 9.bc5 Bc5 10.Be2 0–0 11.d4 Bd6 12.Nbd2 Rc8 13.a4 Nd5 14.Qb3 Qe7 15.Rfc1 N7f6 16.Ne5 Rc7 17.Rc7 Bc7 (17...Qc7 18.Ndc4 Ba6 19.Nd6 Be2 20.Ba3+/–) 18.Ba3+= Bd6 19.Bd6 Qd6 20.a5 Rc8 21.ab6 Qb6 22.Rb1 (22.Qa3 Qd8 23.Ndc4+/– (worse is 23.Qa7 Ra8 24.Qb7 Ra1 25.Nf1 Qc7 26.Qc7 Nc7+=)) 22...Nc3= 23.Qb6 ab6 24.Rb6 Ne2 25.Kf1 Rb8 (better is 25...Nd4 26.ed4 Rc1 27.Ke2 Rc7=) 26.f3?? (better is 26.Nc6 Nd7 27.Ke2 Nb6 28.Nb8 Bg2 29.f3+=) 26...Nc3–+ 27.Kf2 Ncd5 (27...Nd1 28.Kg1 Ne3 29.Ne4–/+) 28.Rb2 Ne7 (better is 28...h6!?–/+) 29.g4 (29.Ne4 Ne4 30.fe4 Nc8+/–) 29...h6 (29...Ng6 30.Ndc4 Ne5 31.Ne5=) 30.h4 (30.Ne4 Ne4 31.fe4 Nc8+=) 30...g5 (better is 30...Ng6 31.Ndc4 Nh4=) 31.hg5+/– hg5 32.Ndc4 Ra8?? (better is 32...Ne8=) 33.Rb7+– Ra2 34.Kg3 Ned5? 35.Nf7 Rc2 36.Ng5 Rc4 37.e4 Ne3? 38.Ne6 Rc3 39.Rg7 Kh8 (39...Kh8 40.Rf7 Neg4+–). orangutandu – gadzet2004, internet, 2012.

5.a3 Nbd7 6.d4 g6 7.Bd3 Bg7 8.0–0 0–0 9.Nbd2 Re8 10.c4 dc4 11.Bc4 Ne4?? (better is 11...a6+=) 12.Ne4+– Be4 13.Bd3 (better is 13.Ng5 Bf5 14.Nf7+–) 13...Bd3+= 14.Qd3 c5 15.bc5 bc5 16.Rfc1 cd4 (better is 16...e5 17.de5 Ne5 18.Ne5 Be5=) 17.Bd4?? (better is 17.Nd4 Nb6 18.Qe2+=) 17...e5–+ 18.Bc3 e4 (18...e4 19.Qd5 ef3 20.Bg7 Kg7 21.Qf3 Ne5–+) 0–1. Fournier,Frederic – Dimexel, Partie evaluee, 1m + 2s, 2009.

5.c4 c6 6.a3 Nbd7 7.d4 g6 (7...e6 8.cd5 cd5 9.Bd3=) 8.cd5 cd5 9.Nbd2 Bg7 10.Bd3 Rc8 11.Qa4 0–0 12.0–0 (12.Qa7? Bc6 13.Bg6 Ra8 14.Qa8 Qa8–+) 12...Ra8 13.Rac1 a6 14.Rc2 b5 15.Qb3 Nb6 16.Rfc1 Nc4 17.Ba1 (< 17.Nc4 dc4 18.Bc4 bc4 19.Qc4 Be4–/+) 17...Rc8 18.Nb1 (< 18.Nc4 dc4 19.Bc4 Rc4 20.Rc4 Bd5–+) 18...Ne4 19.Nc3 Nc3 20.Rc3 (20.Qc3? Ne3 21.fe3 Rc3 22.Bc3 Qd7–+; 20.Bc3?! f6=) 20...Rc7 21.a4 e6 22.Bc2 Qe7 23.a5 Rfc8 24.Bd3 Nd6 25.Rc7= Rc7 26.Rc7 Qc7 27.Qc2 Nc4 28.Qd1 Bf8 29.Qe1 Qd6 30.Bc3 f6 31.Bc2 Bh6 32.Bb3 Qc6 33.Ba1 Nd6 34.Bb2 Ne4 35.Nd2 Nd6 36.Ba1 Bg7 37.Nf3 Bc8 38.Nd2 Bh6 39.Nb1 Ne4 40.Nc3 Nd6 41.Qd1 Bb7 42.Ba2 Bg7 43.Qe1 f5 44.Bb3= Kf7 45.Ne2 Bh6 46.Nc1 Ne4 47.Nd3 (White fights for the Initiative) 47...Bg7 48.Ne5+/– Be5 49.de5 Ng5 50.f3 h6 51.Bb2 Nh7 52.Qh4 h5 53.Qd8 Qc8 54.Qd6 Qc6 55.e4 fe4 56.fe4 Qd6 57.ed6 de4 58.Bd4 Bc6 59.g3 Nf8 60.h4 Nd7 61.Bc2 Bd5=+ 62.Kf2 e5 63.Bb6 Ke6 64.Bc7 Kf5 65.Bb1 Bc6 66.Ba2= Nf6 67.Bb6 Bd7=+ 68.Bb3 Ng4 69.Ke2 Nf6 70.Kf2 Ne8 71.Bc5 Nf6 72.Bb6 ½–½. Bonetti,Shane – patologo (1675), ICC, 2002.

5.c4 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 d5).

5.c4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3 Bb7 6.c4).

5.c4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 b6 5.Nf3 Bb7 6.c4).

5.c4 e6 6.b5 c6 7.bc6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 d5 6.c4 c5 7.bc6).

3.e3 c5

4.b5 a5 5.c4 e6 6.Nc3 d4 7.ed4 cd4 8.Nce2 e5 9.Nf3 Bd6 10.g3 10...Bg4–+ 11.Bg2 d3 12.Nc3 e4 13.Ne4 Ne4 14.0–0 0–0 15.h3 Bh5 16.g4 Bg6 17.Qb3 Re8 18.Qd3 Bh2!! (19.Kh2 Qd3–+) 0–1. Reimer,Karl (1700) – Auer,Peter (2070), It (open) Pfalz GER, 1991. (Same as the game below; which is correct?)

4.b5 a5 5.c4 e6 6.Nc3 d4 7.ed4 cd4 8.Nce2 (8.Na4!?=) 8...e5+= 9.Nf3 Bd6 10.g3 (better is 10.c5!? Bc5 11.Ne5+=) 10...Bg4–/+ 11.Bg2 d3 12.Nc3 e4 13.Ne4 Ne4 14.0–0 (better is 14.Bg7 Rg8 15.Bd4–+) 14...0–0 15.h3 Bh5 16.g4 Bg6 17.Qb3 (17.Ne5 Be5 18.Be5 Re8–+) 17...Re8 18.Qd3 (18.a4–+) 18…Bh2!! (18...Bh2 19.Kh2 Qd3–+) 0–1. Reimer,Karl – Walker,Erik, RLPF–op Hauenstein, 1991. (Same as the game above; which is correct?)

4.b5 a6 5.c4 Bf5 (5...e6 6.Qf3=+) 6.Nc3 (6.cd5!? Nd5 7.ba6 ba6 8.Nc3=) 6...d4=+ 7.Nce2 d3 (7...ab5 8.Ng3 Bg4 9.Qb3 de3 10.Qe3 bc4 11.Bc4=) 8.Nc3 e5 (8...Nbd7=+) 9.Nf3 (Better is 9.Qf3!? Bc8 10.e4+=) 9...Nbd7 10.g3 Be7 11.Bg2 0–0 12.Nh4 Bg6 13.Ng6+= fg6 14.Bb7 Rb8 15.ba6 e4 16.Ba3 h5 17.Rb1+– Qc7 18.a7?? Rb7–+ 19.a8Q Ra8 20.Rb7 Qb7 21.Bc1 Ng4 22.0–0 Rf8 23.Qa4 Nde5 24.h3 Nf3 25.Kg2 Nge5 26.Qb5 h4 27.Qb7+– 1–0. slavisa3 – bampot, Live Game Caissa's Web, 2004.

4.bc5 Ne4 +=.

4.bc5 e6 (--> 1.b4 d5 2.Bb2 e6 3.e3 c5 4.bc5 Nf6).

4.a3 e6

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5).

5.b5 Bd6 6.c4 0–0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0–0 7.c4).

4.bc5 Nc6

5.d4 Bf5 6.c4 a6 7.Nd2 e6 8.Ngf3 e5? 9.cd5+– Na5? 10.Ne5 Qc7 11.d6 Qd8 12.Ndc4 Nc6 13.Bd3 Bd3 14.Qd3 Nb4 15.Qd1 b5 16.Nb6 Bd6 17.Na8 Be5 18.0–0 Bb8 19.e4 0–0 20.e5 Nfd5 21.Qg4 Nd3 22.Bc1 Ne5 23.de5 Be5 24.Bg5 Qa8 25.Rac1 Qc6 26.Rfd1 Nf6? 27.Qf5+– Re8 28.Re1 g6 29.Qf3 Qf3 30.gf3 Kg7 31.Bf6 Kf6 32.f4 Bb2 33.c6 Rc8 34.Rc2 Ba3 35.Rd1 Kf5 36.c7 Be7 37.Rd7 Bh4?? 38.Rf7 Kg4 39.Rh7 Bf6 40.Rf7 Kf5 41.Rc6 Kf4 42.Rff6 Ke5 43.Rg6 (43...b4 44.Rge6 Kf4 45.Red6+–) 1–0. ncc_1701 – michaelanthony, ChessWorld.net, 2005.

5.Nf3 Bg4 6.Be2 e5? 7.Ne5+/– Be2 8.Qe2 Bc5 9.0–0 0–0 10.d4 Bd6+= 11.c4 Qc7 12.f4 Ne4 13.Nd2 Nd2= 14.Qd2 dc4 15.Nc6 Qc6= 16.Qc3 Qb5 17.d5 f6 18.e4 Rac8 19.a4 Qb3 20.e5 Qc3 21.Bc3+= fe5 22.fe5 Rf1 23.Rf1 Bc5 24.Kh1 g6 25.e6 Rf8 26.Re1 Be7 27.g3 Rf3 28.Bd4?? Rd3= 29.Ba7 c3 30.Rc1 Rd5?? 31.Rc3+/– Rd1 32.Kg2 Rd2 33.Kh3 Kg7 34.Rc7 Kf6+/– 35.Rb7 Ke6 36.a5 Ra2 37.Bb6 h6 38.Rb8 Bd6 39.Re8 Kf7 40.Re3 Bb4 41.Re5 ½–½. gtate (1905) – wmalone (2100), net–chess.com, 2004.

3.e3 c6

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6).

4.a3 Bg4 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.a3).

4.a4 e6 5.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3).

4.c4 a5 5.b5 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 a5).

4.c4 dc4 5.Bc4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 dc4 6.Bc4).

4.c4 e6 5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4).

4.a3 Bf5

5.Nf3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.Nf3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

4.c4 Nbd7

5.a3 e6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 e6 5.a3 Nbd7).

5.cd5 cd5 6.a3 e5 7.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.c4).

5.Nf3 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.c4 Bf5

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 c6).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.c4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.Be2 Bf5

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6).

4.Nf3 Nbd7

5.a3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.a3 e6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.Nf3 e6

5.a3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.a3 Be7 6.d4 0–0 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.d4).

4.Nf3 Bg4

5.a3 e6 6.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3).

5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

5.c4 e6 6.Qb3 Nbd7 (--> 1.b4 d5 2.Bb2 Bg4 3.c4 e6 4.Qb3 Nf6 5.e3 Nbd7 6.Nf3 c6).

5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.f4 g6

5.Nf3 Bg7 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 c6).

5.Nf3 Bg7 6.Be2 0–0 7.0–0 Bg4 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 Bg4 7.0–0 c6).

3.e3 Nc6

4.a3 d4 5.ed4 (5.b5!? Ne5 6.Bd4+/–) 5...Nd4= 6.Nf3 Nf5 7.d4 Ne4 8.Bd3 Ned6 9.Nbd2 Be6 10.0–0 b5 11.Rc1 g6?? (better is 11...a5+=) 12.d5!+– Bg7 (12...Bd5 13.c4 Double attack (13.Bh8 Discovered attack; 13.c4 Decoy)) 13.Bg7 (13.de6?! Bb2 14.Rb1 Bf6+/–) 13...Ng7 14.de6 Ne6 15.c4 a6 16.cb5 (better is 16.c5!? Nf5 17.Be4 Ra7+–) 16...ab5 17.Qe2 Ra3 18.Bb5 Nb5 19.Qb5 Kf8 20.Nc4 Nd4 (20...Rd3 21.Ne3+–) 21.Qe5 (21.Nd4 Rd3 22.Nc6 Rd5+–) 21...f6 (21...Nf3 22.gf3 f6+–) 22.Qd4 Qd4 23.Nd4 (23.Na3?! Qb4 24.Nc2 Qb7+=) 23...Kg7 (23...Ra4+–) 24.Na3 Rd8 25.Rfd1 (better is 25.Ne6 Kh6 26.Nd8 g5+–) 25...Ra8 26.Nc4 Ra4 27.b5 c5 28.bc6 Kf7 29.c7 Ra8 30.Nb6 Rf8 31.c8Q (better is 31.Nc6 Kg7 32.Rd8 Rf7+–) 31...Rc8 32.Rc8 h5 33.Nf3 1–0. Fournier,Frederic – altoybajo, Active, 2008.

4.a3 Bd7 5.Nf3= e6 6.c4 dc4 7.Nc3 Be7 8.Bc4 0–0 9.0–0 Bd6 10.Nb5 a6 11.Nd6 cd6 12.Rc1 d5 13.Be2 e5? (better is 13...Rc8!?+/–) 14.Ne5+– Ne5 15.Be5 Ne4 (15...Qe7 16.f4+–) 16.d3 Ng5 17.f4 Ne6 (17...Qe7+–) 18.f5 Ng5 19.h4 f6 20.Bc7 (20.hg5?! fe5 21.f6 gf6+=) 20...Qe7 21.hg5 Qe3 22.Rf2 (22.Kh1 fg5 23.Bg4 Rf6+–) 22...Bf5?! (22...fg5 23.Bf3 Rf5+–) 23.Bf3 Kh8 24.Bd5 fg5 25.Qd2 Qd2 (25...Qd4 26.Bb7 Rae8 27.Ba6+–) 26.Rd2 Rac8 (26...h5 27.d4+–) 27.Bb7 Rc7 (27...Rce8 28.Ba6 h5 29.b5+–) 28.Rc7 Rb8 (28...Rf6 29.Rf2 h5 30.Be4 Be4 31.Rf6 gf6 32.de4+–) 29.Ba6 Ra8 (29...h5 30.Rf2 Bg6 31.Bc4+–) 30.Rf2 Bg6 (30...g6 31.Re2 g4+–) 31.Rc8 Be8 32.Rf8 1–0. usingprogram (2040) – paaponen, internet, 2011.

4.a3 e6 5.Be2 =.

4.a3 g5 5.h3 g4 (5...Bg7 6.Nf3=) 6.hg4 (better is 6.Bf6 ef6 7.hg4+/–) 6...Ng4?? (better is 6...Bg4 7.f3 Be6+=) 7.Bh8+– f6 (7...Bf5 8.Be2 Qd7 9.b5+–) 8.Rh7 Bh6 (8...Bf5 9.Rh5 Qd7 10.d4+–) 9.Bg7 Bg7 10.Rg7 Nh6 (10...Qd7 11.Nf3 Qd6+–) 11.Qh5 Kf8 (11...Kd7 12.Qd5 Ke8 13.Qh5 Kd7 14.Qh6 Qf8+–) 12.Qh6 Ke8 13.Rg8 (13.Qh5 Kd7 14.Qd5 Ke8 15.Rg8) 13...Kf7 14.Qg6 Ke6 15.Rd8 Bd7 16.Ra8 (16.Qg4 f5 17.Qg6 Ke5 18.Nf3 Ke4 19.Nc3) 16...Ne5 17.Qg8 Kd6 18.Nf3 f5 19.Ne5 Ke5 20.Nc3 Bb5 (20...c6 21.Qg3 f4 22.Qf4 Ke6 23.Ne4 de4 24.Bc4) 21.f4 Kd6 22.Qd5 1–0. Fournier,Frederic – blek13, Active, 2008.

4.a3 g6 5.Nf3 Bg7 6.Be2 0–0 7.d3 Bg4 8.Nbd2 a6 9.0–0 Qd7 10.c4 Bf3 11.Nf3 (worse is 11.gf3 Rfd8+=) 11...dc4 12.dc4 Qd1 13.Rfd1 Rad8 14.Rd8 Rd8 15.Rd1 Rd1 16.Bd1 Nd7 17.c5?? (17.Bg7 Kg7 18.Nd2 f5+=) 17...Na7 (better is 17...Bb2 18.Be2 Ba3–+) 18.Bg7+= Kg7 19.Ba4 Nf6 20.Nd4 c6 (20...e5 21.Nf3 e4 22.Nd4+=) 21.f3 (21.Nb3 Nb5 22.Bb5 ab5+/–) 21...Nb5 22.Bb5 ab5 23.Kf2 Nd5 24.Ke2 (24.Nb3!?+/–) 24...Nc3+= 25.Kd3 Nb1 26.Nc2 e5 27.e4 f6 28.g3 Kf7 29.h4 h5 30.g4 (30.Ke3 g5+=) 30...hg4 (30...g5 31.hg5 h4 32.Ke2 fg5 33.Kf2–/+) 31.fg4= g5?? (better is 31...Kg7=) 32.h5+– Kg7 33.Ke3?? (better is 33.Ne3 Na3 34.Nf5 Kf8 35.Nd6+–) 33...Nc3 (33...Kh8 34.Na1=) 34.Kd3 Nb1 35.Ke3 (better is 35.Ne3 Na3 36.Nf5 Kf8 37.Nd6+–) 35...Nc3+= 36.Kd3 Nb1= ½–½. Fournier,Frederic (1950) – championchafa (1920), Active, 2004.

4.b5 Na5 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 d5).

4.b5 Nb8 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Nf6).

4.b5 Ne5?? 5.Be5 e6 6.c4 dc4 7.Bc4 Ne4 (7...Nd7 8.Bc3+–) 8.d3 (8.Nh3 Nd6 9.Qb3 Bd7+–) 8...Nf6 (8...Qg5 9.Nf3 Qg2 10.Rf1+– (10.de4?! Qh1 11.Ke2 Qd1 12.Kd1 Bd7+/–)) 9.Nf3 Bb4 10.Bc3 Bc3 11.Nc3 Nd5 (11...0–0 12.d4+–) 12.Qb3 Nc3 13.Qc3 0–0 14.0–0 c6 (14...a6 15.a4+–) 15.a4 (15.bc6 bc6 16.d4 Qd6+–) 15...cb5 16.Bb5 a6 17.Bc4 b5 18.ab5 Bd7 19.ba6 Bc6 20.Ne5 Qb6 21.Rfb1 Qc5 22.d4 f6 23.Be6 (23...Kh8 24.Qc5 Bg2 25.Nf7 Rf7 26.Bf7+–) 1–0. wlittle (2245) – johansson, net–chess.com, 2004.

4.Bb5 Bd7 5.a3 =+.

4.a3 a6

5.c4 e6 6.cd5 ed5 7.Nf3 Bd6 8.Be2 Ne7 (8...Bf5 9.0–0=) 9.0–0 0–0 (9...Nf5 10.Qc2=) 10.h3 (10.Bf6 gf6 11.d4 Bf5+/–) 10...c5 (better is 10...Ng6!?=) 11.bc5 Bc5 12.d3 (12.Bf6!? gf6 13.d4+/–) 12...Nf5 Black intends d4 13.Nbd2 d4 (13...Be3 14.fe3 Ne3 15.Qb3 Nf1 16.Rf1=) 14.ed4 (better is 14.Nb3!? b6 15.Nfd4 Nd4 16.Nd4+/– (16.ed4?! Be7=)) 14...Bd4 15.Nd4 Nd4 16.Nf3 Nf5 17.d4 Ne7 18.Rc1 Bf5 19.Bd3 Bd3 20.Qd3 Ng6 21.Rfe1 Re8 22.Re8 Qe8 23.Qc3?? (23.Qb3 Qd7=) 23...Ne4?? (better is 23...Nf4 24.Kh2 Ne2–+) 24.Qc2 Nd6 25.d5 Rc8 26.Qd2 Ne4 27.Rc8 Qc8 28.Qd4 Qc2?? (better is 28...Nf6 29.Ne5 Ne5 30.Qe5 Qd7+=) 29.Qg7 1–0. Fournier,Frederic (1755) – DADYYAN, Active, 2005.

5.Nf3 b5 6.d4 Bg4 7.h3 Bh5 8.a4 e6 (8...Bf3!? 9.gf3 Rb8+=) 9.ab5+/– ab5? (better is 9...Na7 10.Ra6 Bg6+/–) 10.Bb5+– Ra1? (10...Bb4 11.c3 0–0 12.Bc6 Ra1 13.Ba1 Be7+–) 11.Bc6 (11.Ba1?! Qa8 (11...Bb4? 12.c3 0–0 13.Bc6+–) 12.g4 Bg6+/–) 11...Ke7 (11...Nd7 12.Ba1 Bb4 13.c3 Bd6+–) 12.Ba1 Ne4 (12...Nd7 13.e4 Nb8 14.ed5 Nc6 15.dc6+–) 13.Nbd2 f5 (13...Qd6 14.b5 Nd2 15.Qd2+–) 14.g4! fg4 (14...Be8 15.Ne5 Qd6 16.b5 Bc6 17.Nc6 Kf7 18.c4 dc4 19.Nc4+–) 15.hg4 Bg6 (15...Bg4 16.Ne4 de4 17.Be4+–) 16.Ne5 Ng5 (16...Be8 17.Ne4 de4 18.c4+–) 17.Ng6 Kf6 18.Nh8 Bb4 19.c3 Bd6 20.Rh7! Nh7 21.Qf3 Kg5 22.Ne4! de4 23.Nf7 Kg6 24.Be4# 1–0. orane – GlobeisWarming2, Live Game Caissa's Web, 2006.

5.Nf3 e5 6.b5 ab5= 7.Bb5 Bg4 (7...e4!? 8.Ne5 Qd6=) 8.Be5+= Be7 9.Bb2 0–0 10.Be2 Ne4 11.d3 Bf3 12.Bf3 (worse is 12.de4 Be4 (worse is 12...Bg2 13.Rg1+/–) 13.Nc3 Bf6+=) 12...Ng5 13.0–0 d4? (better is 13...Bf6 14.Nc3 Re8+=) 14.Bc6+– bc6 15.Bd4 c5 16.Be5 f6 17.Bf4 Bd6 18.Bd6 (18.Qg4 Re8+–) 18...cd6 19.Nd2 Qd7 20.Nf3 h5? (better is 20...d5+–) 21.Ng5 fg5 22.Qh5 Ra4 (22...Qf5 23.a4+–) 23.Qg5 Rg4 (23...d5 24.Rfe1+–) 24.Qd5 Rf7 25.g3 (25.Rfb1 Qc7+–) 25...Qe7 26.Rab1 g6 (26...Rg6 27.Rb8 Kh7 28.c4+–) 27.e4 (27.Rb6 Kh7 28.e4 c4 29.Qd6 Qh4+–) 27...Kg7 (27...Rg5 28.Rb8 Kg7 29.Qa2+–) 28.Rb6 Rg5 29.Qd6 Qf8 (29...c4 30.Rfb1+–) 30.Qf8 Rf8 31.f4 Rh5 32.Rb7 Kg8 33.Rfb1 g5 34.fg5 Rg5 35.Rb8 (35.Rc7 Ra8+–) 35...Rg4 (35...c4 36.d4+–) 36.Rf8 Kf8 37.a4 1–0. Fournier,Frederic (1925) – second, Active, 2011.

5.Nf3 e5 6.Be5?! Ne5 7.Ne5 Bd6 =.

5.Nf3 e5 6.Ne5 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.d4 Bg4 10.Be2 Be2 11.Qe2 0–0 12.Nd2 Rfe8 13.0–0 c6 14.c4 Ne4 15.Rfc1 a5 16.cd5 Qd5 17.Nc4 ab4 18.Nb6 Qa5? (better is 18...Nc3!? 19.Rc3 Qd8 20.Rc6 bc6 21.Na8 Qa8+–) 19.Na8 Ra8 20.Qb2 Qf5 21.ab4 Re8 22.Ra5 (22.Ra5 Qf6 23.Re5+–) 1–0. b4_player – story, casual, 2013.

5.Nf3 e6 6.d4 Be7 7.Bd3 h6 8.0–0 0–0 9.Nbd2 b5 10.c3 Bb7 11.a4 ba4 12.Qa4 Bd6 13.Rfb1 Qc8 14.Re1 Re8 15.Qc2 Ne7 16.Ne5 Be5 17.de5 Nd7 18.f4 c5 19.Qd1 cb4 20.cb4 Qc6 21.Bd4+/– Nb8 22.Nb3 Nd7 23.Qg4 Rec8?? 24.Rec1+– Qc1 25.Nc1 Rc1 26.Rc1 a5 27.Rc7 ab4 28.Rd7 (28...Bc6 29.Re7+–) 1–0. kamret (2185) – G_Kasparov (1620), GameColony.com, 2005.

5.Nf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.h4 (8.b5!? ab5 9.Bb5=) 8...Ng4–/+ 9.h5 Be4 10.d3 Bf5 11.Bh3 (11.Be2 e5+=) 11...e5 12.Ne5 (12.Qe2!?–/+) 12...Nce5 13.Be5 Ne5 14.Bf5 Qg5 (14...Qf6 15.d4 Qf5 16.de5–/+) 15.d4? (better is 15.Bh3=) 15...Qg2–+ 16.Kd2? (better is 16.Rh3!? Qg1 17.Ke2–/+) 16...Qf2 17.Kc1 Nc4 (17...Qf5 18.de5 Qe5 19.Qd4–+) 18.Bd3 (18.Qd3 Be7 19.Nc3 Qe3 20.Kb1–+) 18...0–0–0 (better is 18...Qe3!? 19.Nd2 Qd4 20.Qe2 Kd7 21.Ra2–+) 19.Qg4 (19.Bc4 Qe3 20.Qd2 Qd2 21.Nd2 dc4–/+) 19...Kb8 (19...Rd7 20.Bc4 Qe3 21.Kb2 dc4 22.Rf1–+) 20.Qf4 (20.Rh3 Ne3 21.Qf3 Qg1 22.Kb2 Nc4 23.Bc4 Qd4 24.Nc3 Qc4 (24...dc4? 25.Rd1+–) 25.Qf7 Qg4–+) 20...Qe3 21.Qe3 Ne3 22.Nc3 c6 23.Re1 Nc4 24.Bc4 dc4 25.Kb2 g6 26.Rh1 Bg7 27.Ne2 Rhe8 28.Rae1 Re4 29.h6 Bh8 30.c3 b5 31.Ng3 Ree8 32.Ne4 f5 33.Nc5? f4 34.Na6 Kb7 35.Nc5= Kc8 36.a4 f3 37.Rhf1 Re1 38.Re1 g5 39.Kc2 g4 40.Ne4? Re8 41.a5?? g3!–+ 42.Nd6 Kd7 43.Re8 f2 44.Rh8 Kd6 45.Rf8 g2 46.Rf2 g1Q 47.Rd2 Qg6 48.Kb2 Qh6 49.a6 Qd2 50.Kb1 Kc7 0–1. willi_weizenkeim – FabianW, playchess.de, 2002.

5.Nf3 Bg4 6.Be2 e6 7.h3 Bh5 8.d4 Be7 9.c4 dc4 10.Bc4 b5 11.Be2 Nb8 12.Nbd2 c6 13.Rc1 Qb6 (13...a5 14.g4 Bg6 15.Ne5=) 14.0–0 0–0 15.Ne5 Exerts pressure on the backward pawn (15.Qc2 a5=) 15...Be2 16.Qe2 Rc8 (16...a5 17.ba5 Ra5 18.Qf3=) 17.Rc2 (17.Nb3 Nbd7+=) 17...Nbd7 18.Nd7 Nd7 19.Nf3 (19.Nb3!?+/–) 19...a5= 20.ba5 Ra5 21.Rc3 b4 (21...Qa6 22.Ra1+=) 22.ab4 Qb4 23.Rfc1 Ra2 24.R3c2 Nb8 25.Qd2 Qd2 26.Nd2 Bb4 27.Nc4 (27.Bc3 Rc2 28.Rc2 Be7+=) 27...h6 28.Bc3 Rc2 29.Rc2 Bc3 30.Rc3+= Na6 31.Na5 c5 32.dc5 Rc5= 33.Rc5 Nc5 34.Nc4 f6 35.Kf1 Kf7 36.Ke2 e5 37.f3 g5 38.e4 Ke6 39.Ne3 Nb3 40.Nf5 Nd4 41.Nd4 ed4 42.Kd3 Ke5 43.g3 h5 44.Ke2?? h4 45.gh4 gh4 46.Kd3 Kf4 47.Kd4 Kf3 48.Kd3?? Kg3 49.Ke3 Kh3 50.Kf3 Kh2 51.Kf2 Kh3 52.Kf3 Kh2 53.Kf2 Kh3 54.Kf3= ½–½. Fournier,Frederic – prisha (1710), Active, 2007.

4.a3 b5

5.Bb5+/– a5?? 6.Bc6+– Bd7 7.Ba8 Qa8 8.ba5 d4 9.Bd4 (better is 9.Nf3 de3 10.fe3 Qa5 11.0–0+–) 9...Qg2 10.Qf3 Qf3?? (10...Bc6 11.Qg2 Bg2+–) 11.Nf3 Bc6 12.Ke2 Nd5 13.Nc3 Nc3 14.Bc3 e6 15.Rab1 f6 16.Rb8 Kf7 17.a6 g6 18.a7 Bg7 19.Rh8 Bh8 20.Rb1 Bg7 21.Rb8 e5 22.a8Q Ba8 23.Ra8 e4 24.Nd4 Bf8 25.Ra7 Bd6 26.Bb4 Bh2 27.a4 Ke8 28.a5 Kd8 29.Ne6 Kc8 30.a6 Kb8 31.Rb7 Kc8 32.Nc5 Bd6 33.d4 h5 34.c3 h4 35.Ne4 Bb4 36.cb4 h3 37.Kf1 g5 38.Kg1 g4 39.Kh2 f5 40.Nc5 c6 41.a7 1–0. Fournier,Frederic – memofe, Active, 2009.

5.Bb5+/– Qd7 6.Nf3+– a6? (better is 6...Bb7+–) 7.Ne5 Rb8 (7...Ne5 8.Bd7 Ned7 9.Bf6 Nf6+–) 8.Bc6 Kd8 9.Bd7 Bd7 10.Nf7 Ke8 11.Nh8 g6 12.Bf6 Bg7 13.Bg7 (13.Bg7 Rd8 14.c4 dc4 15.Qf3+–) 1–0. b4_player (2245) – filiforme, GameColony.com, 2003.

5.Bb5+/– Bd7 +/–.

4.a3 Qd6

5.Nf3 a6 6.c4 dc4 7.Bc4 g6 (7...Bg4!?=) 8.Ng5+/– Ne5 9.Qb3 Nc4 10.Qc4 Be6 11.Ne6 fe6 12.f4 Bg7 13.Be5 Qd5 14.Qe2 (worse is 14.Qc7 Qg2 15.Rf1 Nd5 16.Qb7 Nf4 17.Qg2 Ng2 18.Kf2 Be5–/+) 14...Rc8 15.0–0 0–0 16.Rc1 c6 17.Nc3 Qd7 18.Na4 Rcd8 19.d4 Rf7 20.Nb6 Qe8 21.Bc7 Rd7 (better is 21...Rd5!?+/–) 22.Nd7+– Qd7 23.Be5 Qd5 24.Rc5 Qe4 25.Rac1 Kh8 26.Kf2 (26.Qf3 Qf3 27.gf3 Nd7 28.Bg7 Kg7+–) 26...h5 (26...Nd5 27.Bg7 Kg7 28.R5c4+–) 27.h3 (27.Kg1 Nd5 28.Bg7 Kg7+–) 27...Kg8 (27...Nd5 28.Bg7 Kg7 29.g3+–) 28.g4 (28.Qc2!? h4+–) 28...hg4 29.hg4 Nd7 30.R5c3 (30.R5c4!? Ne5 31.de5 Qe5+–) 30...Be5+/– 31.de5 Ne5 32.Ke1 Nf3 33.Kd1 Rh7 34.Qd3 Rh1 (34...Rh2 35.Rb3+= (35.Qe4?? Rd2)) 35.Kc2+= Rh2 (35...Ne1!? 36.Re1 Qd3 37.Kd3 Re1+=) 36.Kb3 Nd2 37.Ka4 (better is 37.Kb2+/–) 37...Qf3?? (better is 37...Nc4! 38.Qd8 Kf7 39.Rc4 b5 40.Ka5 bc4=) 38.R1c2 (better is 38.Qg6 Kf8 39.Rd3 Qd5 40.Rd5 ed5 41.Qf5 Kg7 42.Qe5 Kf7+–) 38...b5?? (better is 38...Qd5 39.Qd5 ed5+– (worse is 39...cd5 40.Rc7+–)) 39.Ka5 Nc4 (39...Kf7 40.Rd2 Rd2 41.Qd2+–) 40.Rc4 bc4 (40...Kg7 41.Qd7 bc4 42.Qe7 Kg8 43.Rh2 Qd5 44.Kb6 Qd8 45.Qd8 Kg7 46.Qh8 Kf7 47.Rh7) 41.Qg6 Kf8 42.Rh2 Qd5 43.Ka6 Qb5 44.Ka7 Qa4 45.Kb7 Qb5 46.Kc7 Qb6 (46...Qe5 47.fe5 c3 48.Rh8) 47.Kb6 c3 48.Rh8 1–0. Holz auf der Heide,Gerhard (1865) – Plumbaum,Nadja, Leipzig VfB op, 2009.

5.Nf3 e5 6.b5+/– Na5 7.Be5 Qc5 8.Bd4 Qd6 9.Be2 Be7 10.0–0 0–0 11.d3 c5 12.bc6 bc6 13.Bc3 Nb7 14.Nbd2 Bg4 15.d4 Bd8 16.Bb4 c5 17.dc5 Nc5 18.Nb3 Bb6 19.c4 Rad8 20.cd5 Nd5 21.Bc4 Nb4 22.Qd6 Rd6 23.ab4 Nb3 24.Bb3 Rfd8 25.Rfd1 Rd3? (better is 25...Bf3 26.gf3 Kf8+=) 26.Rd3 Rd3 27.Bc4 (better is 27.Bf7!? Kf8 28.Ne5+–) 27...Rc3+/– 28.Bf1 Rc2 29.Ne5 Be6 30.Nc6?? (better is 30.b5+/–) 30…Rc6–+ 0–1. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

5.Nf3 Bg4!? =.

4.a3 e5

5.b5 Nb8 6.Be5 Bd6 7.Bd6 Qd6 8.Nf3 0–0 9.Be2 Nbd7 10.0–0 Ne5 11.Ne5 Qe5 12.d4 Qg5 13.g3 (13.Nd2 Bh3 14.Bf3 a6+/–) 13...Bh3 14.Re1 Ne4 15.Bf1 Bd7 16.Bg2 (16.Qf3 a6 17.ba6 b5+/–) 16...f5 (better is 16...Bb5!? 17.f3 Nf6=) 17.Qd3+/– Qh5 18.Nd2 Rae8 19.Ne4 (better is 19.Nf3+/–) 19...fe4= 20.Qf1 Bg4 21.a4 Bf3 22.Rec1 Rf7 23.c4 (23.Bf3 Rf3 24.c4 c6+=) 23...Ref8 (23...Be2 24.Qe1 Bc4 25.Rab1–/+) 24.cd5?? (better is 24.Rc2 c6 25.Bf3 Rf3 26.cd5 cd5 27.Rac1+=) 24...Bg2–+ 25.Qg2 Rf2 26.Qh1? (better is 26.Qf2 Rf2 27.Kf2 Qh2 28.Kf1 Qh1 29.Ke2 Qf3 30.Kd2 Qf2 31.Kc3 Qe3 32.Kc4 Qd3 33.Kc5 Qg3 34.a5–+) 26...Qe2 (better is 26...Rd2 27.Re1 Qh6–+) 27.Re1? (27.Qe4 Rh2 28.Rf1 Rhf2 29.Rf2 Qf2 30.Kh1 Qg3+=) 27...Qc2 28.Rac1 Qa2 29.Ra1 Qd5–/+ 30.Rf1? Qf5 31.Rfe1–/+ Qg4 32.Rf1?? Qe2 33.Rfe1 Qg4 34.Rf1 Qf5 35.Rfe1–/+ h6 36.Rad1 h5 37.Rc1?? h4 38.Rcd1 h3 0–1. Fournier,Frederic (1630) – dieguito (1730), Active, 2007.

5.b5 Nb8 6.Be5 Nbd7 +=..

5.b5 Nb8 6.Be5 Ne4 7.Nf3+/– Bg4 8.h3 Qh4? (better is 8...Be6+/–) 9.Nh4+– Bd1 10.d3 (10.Kd1?! Nf2 11.Ke1 Nh1 12.Bc7 Be7=; 10.Bc7?! Bc2 11.Nc3 Nc3 12.dc3 Nd7+/–) 10...Bc2 11.de4 Be4 (11...Nd7 12.Bc7 Rc8 13.Bf4+–) 12.Nc3 f6 (12...Nd7 13.Bc7 Rc8 14.Ne4 de4 15.Bh2+–) 13.Bg3 (13.Bc7 Nd7+–) 13...Nd7 (13...c6 14.f3 Bg6 15.Ng6 hg6 16.Bd3+–) 14.f3 (14.Bc7?! Rc8 15.Ne4 de4+–; 14.Ne4?! de4 15.Bc7 Rc8+–) 14...Bc2 (14...g5 15.fe4 gh4 16.Nd5+–) 15.Nd5 (15.Bc7?! Rc8 16.Kd2 Bb3+–) 15...0–0–0 16.Bc7 Re8 17.Rc1 Bb3 18.Bc4 Bc4 (18...Ba3 19.Rc3 (19.Bb3?! Bc1 20.Nf5 Nc5+–) 19...Bc4 20.Rc4+– (20.Ra3?! Bd5 21.Bg3 Ne5+/–)) 19.Rc4 b6 (19...Nc5 20.b6 a6 21.Nf5+–) 20.Bb6 Kb8 21.Ba7! Ka7 22.Rc7 Kb8 23.Rd7 Ba3 24.Rg7 Bd6 (24...Re5 25.e4 Rd8 26.0–0 Bc5 27.Kh1+–) 25.Nf5 Bc5 (25...Re5 26.e4 Rf5 27.ef5+–) 26.Nf6 Ba3 (26...Bb4 27.Kf2 Rc8 28.Rh7 Rh7 29.Nh7 Rc2 30.Kg3+–) 27.Ne8 Re8 28.Rh7 Bb4 29.Ke2 Rd8 30.Nd4 Re8 31.Nc6 1–0. Cirulis,Ilmars (1905) – Norris,Hugh (1800), FICGS, 2016.

5.b5 Bg4?? 6.f3+– Ba3? 7.Na3 Bf5 8.bc6 bc6 9.Ne2 (9.Be5 0–0+–) 9...a5 (9...Qe7 10.f4 ef4 11.Nf4+– (worse is 11.ef4 0–0+–)) 10.Ng3 Qc8 (10...Bg6 11.Be5 0–0 12.Be2+–) 11.Nf5 (better is 11.Be5 Qe6 12.Nf5 Qf5 13.Bc7 Qd7+–) 11...Qf5 12.Bd3 e4 (12...Qe6 13.f4! e4 14.Be2+–) 13.fe4 Ne4 14.Qf3 Qf3 15.gf3 Nd6 (15...Nf6 16.Rg1+–) 16.e4 (better is 16.Rg1 Ke7 17.Bg7 Rhb8 18.Bh7 Rb4+–) 16...de4 17.Be4 Ne4 18.fe4 a4 (18...0–0 19.Rf1 a4 20.d3+–) 19.Bg7 Rg8 20.Be5 1–0. Fournier,Frederic – COMP Demoschach, France, 2000.

5.b5 Bg4?? 6.f3+– Bc8 7.bc6 Bd6 8.cb7 Bb7 +–.

5.b5 Bg4?? 6.f3 Ne4 7.fg4 Qh4 8.g3 Ng3 +–.

5.b5 Bg4?? 6.f3 Bf3 7.Nf3 +–.

5.Bb5 a6 6.Ba4 Bd7 7.Bb3 Bd6 8.Nc3 Be6 9.Nce2 (9.Nce2 0–0 10.Nf3+=). babai (1630) – GazzaK, internet, 2008.

5.Bb5 Qd6 A) 6.Bc6 bc6 7.d3 (7.Nf3 e4 8.Ne5 c5 9.bc5+=; 7.c4 a5 8.Nf3 Nd7 9.c5=) 7...a5 8.Nd2 Bg4 9.Ngf3=; B) 6.d4 B1) 6...e4 7.c4 (7.Nd2 a6 8.Be2 Be7 9.c4+=; 7.Ne2 a6 8.Ba4 Be7 9.c4+=) 7...a6 8.c5 Qe6 9.Be2=; B2) 6...Nd7 7.Bc6 (7.Ne2 a5 8.0–0 ab4 9.ab4=; 7.Nf3 e4 8.Nfd2 a5 9.c3+=) 7...bc6 8.de5 Ne5 9.Nd2=; B3) 6...ed4 7.Bd4 (7.ed4 a5 8.Qe2 Be7 9.ba5+=; 7.Qd4 Bd7 8.Qd1 a5 9.Ba4+=) 7...a6 8.Bc6 Qc6 9.Nc3+=; C) 6.Nf3 C1) 6...e4 7.Ne5 (7.Nd4 Bd7 8.0–0 a5 9.ba5=) 7...a6 8.Bc6 bc6 9.c4=; C2) 6...Nd7 7.0–0 (7.d3 a5 8.ba5 f6 9.d4=; 7.Nc3 e4 8.Nh4 Nb6 9.Qh5=) 7...a5 8.d3 ab4 9.ab4=.

5.Bb5 e4 6.Nc3 A) 6...a5 7.Bc6 (7.ba5 Bd7 8.Nge2 Na5 9.Ng3+=; 7.Ba4 Bg4 8.f3 ef3 9.gf3+=) 7...bc6 8.ba5 Bd6 9.d3+=; B) 6...Bd6 7.Bc6 (7.d3 a5 8.de4 de4 9.Qd4+=; 7.Nge2 0–0 8.Bc6 bc6 9.0–0+=) 7...bc6 8.d3 Rb8 9.de4=; C) 6...Bd7 7.Nge2 (7.d3 a5 8.de4 de4 9.Nd5+=; 7.Bc6 Bc6 8.Nge2 Bd6 9.Nd4+=) 7...Bd6 8.0–0 a5 9.Bc6+=.

5.Bb5 e4 6.d3 A) 6...Bd7 7.Nd2 (7.Ne2 Bd6 8.de4 de4 9.Nd2=; 7.de4 de4 8.Nd2 a5 9.Bf6+=) 7...a6 8.Ba4 Be7 9.de4=; B) 6...Bg4 7.Ne2 (7.f3; 7.Qd2) 7...Bd7 8.de4 de4 9.Nd2=; C) 6...a5 7.Bc6 (7.ba5 Bd7 8.de4 de4 9.Nd2+=; 7.de4 Ne4 8.Nd2 Bd7 9.Ne4+=) 7...bc6 8.ba5 Rb8 9.Bc3=.

5.Bb5 e4 6.Ne2 A) 6...Bd6 7.0–0 (7.Bf6 Qf6 8.Nbc3 Qg5 9.h4+=; 7.Nd4 Bd7 8.Bc6 bc6 9.Nb3=) 7...a5 8.f3 ab4 9.ab4=; B) 6...Bd7 7.d3 (7.0–0 a5 8.Bf6 gf6 9.Nbc3=; 7.Bf6 Qf6 8.Nbc3 Qg5 9.0–0=) 7...Bd6 8.de4 de4 9.Nd2=; C) 6...a5 7.ba5 (7.Bc6 bc6 8.ba5 Bd6 9.d3+=; 7.Nd4 Bd7 8.ba5 Nd4 9.Bd7+=) 7...Bd7 8.Nf4 Ra5 9.Bf6=.

5.Bb5 Bg4 6.f3 (6.Bc6 bc6 7.f3 Be6 (7...Bf5 8.Be5 a5 9.ba5 Nd7 10.Bg3 Ra5+=; 7...Bd7 8.Be5 c5 9.Nc3 c6 10.Rb1 Nh5+=) 8.Be5 Nd7 9.Bf4 a5 10.ba5 Qf6+=) 6...Bd7 7.Bc6 e4?? (better is 7...Bc6 8.Be5 a5 9.ba5 Ra5 (9...Nd7+= 10.Bd4 Bd6+=) 10.Ne2 Bd6=) 8.Bf6 Bc6 (8...Qf6 9.Bd7 Kd7+–) 9.Bd8 (9.Bd8 Rd8 10.Nc3+–) 1–0. pierre – gmmutti, internet, 2008.

5.Nc3 Bd6+= 6.Bb5 0–0 7.Bc6 bc6 8.b5 (8.Nf3 a5+=) 8...c5 (8...Rb8 9.a4–+) 9.Nf3 (9.Rb1 Rb8–/+) 9...e4 10.Ng5 (better is 10.Ng1–/+) 10...d4?? (10...h6 11.Nh3–/+) 11.ed4?? (11.Nce4 Rb8 A) worse is 12.ed4 A1) 12...Rb5?! 13.dc5 (worse is 13.Nd6 Qd6 14.Qc1 Re8 15.Kf1 cd4–+) 13...Ne4 14.Ne4=; A2) 12...Re8 13.d3 Ne4 14.Ne4 f5–/+; B) 12.a4+=) 11...cd4–/+ 12.Nd5? (better is 12.Ne2 h6 13.Nh3 Bh3 14.gh3–/+) 12...Nd5–+ 13.Ne4 (13.h4 Bc5–+) 13...Qe7 14.d3 Bf4 (better is 14...f5 15.Bd4 fe4 16.0–0–+) 15.Bd4 (15.0–0 f5 16.Nd2–+) 15...Bf5 (better is 15...f5 16.Qh5 g6–+ (16...fe4?! 17.Qd5 Be6 18.Qe4–/+)) 16.Bc5 (better is 16.0–0–+) 16...Qh4?? (better is 16...Bd6 17.Bd6 cd6–+) 17.Bf8 (17.g3 Qh3 18.gf4 Be4 19.de4=) 17...Be3?? (17...Rf8 18.g3 Qe7+=) 18.g3+– Bf2?? 19.Nf2 Qg5?? 20.Bc5 Re8 21.Qe2 Re2+= 22.Ke2 Nc3 23.Kf1 Qf6 24.Ba7 Bh3+= 25.Kg1?? Ne2 0–1. Pekin Dragons – interloper, ChessWorld.net, 2011.

5.c4 dc4 6.Bc4 a6 7.Nf3 b5 8.Bb3 h6 9.Ne5 Ne5 10.Be5 Ng4 (10...Bd6!? 11.d4 Be5 12.de5 Qd1 13.Bd1 Nd7+=) 11.Bb2 Bb7?? (better is 11...Nf6+–) 12.Qg4 h5 (12...Qd3 13.Bc3+– (13.Bg7 Rg8 14.Bf7 Kf7 15.Qf4 Kg7 16.Qc7 Kh8 17.Qb7 Bg7–/+)) 13.Qf5 f6 (13...Qd7 14.Qe5 Qe7 15.Qg3+–) 14.Qg6 Kd7 15.Qf7 (15.0–0!? Qe8 16.Qf5 Kd8+–) 15...Kc8 (15...Qe7 16.f3+–) 16.0–0 Qe7 17.Nc3 Qf7 18.Bf7 Be7 (18...Kd7 19.Rfc1+–) 19.Rac1 h4 (19...Kd7 20.d4+–) 20.Nd5 Bd5 21.Bd5 Ra7 (21...Rb8 22.Rc6 Rb6 23.Rb6 cb6 24.Rc1 Kd7 25.Bb7+–) 22.Bd4 Rd8 (22...c5 23.bc5 Rc7 24.e4+–) 23.Be6 Kb8 (23...Kb7 24.Ba7 Rd2 25.Bd4+–) 24.Ba7 Ka7 25.Rc7 (25.Rc7 Kb8 26.Re7 Rd2 27.Rc1+–) 1–0. mgriffin (1640) – tbear (1640), net–chess.com, 2001. (=1.a3 d5 2.b4 Nf6 3.e3 Nc6 4.Bb2 e5)

5.c4 dc4 6.Bc4 Bf5 7.Nc3 (better is 7.Nf3 Bd6 8.d3=) 7...Bc5?? (better is 7...Bd3 8.Qb3 Qd7+=) 8.bc5+– 0–0 9.Nge2 Ne4 (9...Bd3 10.Qa4+–) 10.Ne4 Be4 11.f3 (11.0–0 Na5 12.Ba2 Qg5+–) 11...Bg6 (11...Bf3 12.0–0 Bd5 13.Bd5 Qd5 14.Qc2+–) 12.Qb3 (12.Bb5 Qg5+–) 12...b6 (12...Na5 13.Qb4 Nc4 14.Qc4+–) 13.cb6 (13.Qc3 a6+–) 13...cb6 14.d4 (14.Qa4 Na5 15.Ba6 Re8+–) 14...Re8 (14...Na5 15.Qb4 Nc4 16.Qc4 Qg5+–) 15.de5 (15.Bb5 Rc8+–) 15...Ne5? (better is 15...Na5 16.Bf7! Bf7+/–) 16.Be5+– Re5 17.Rd1 Qe7 (17...Qh4 18.g3 Qe7 19.e4+–) 18.e4 b5 (18...b5 19.Bd5 Re8+–). mgriffin (1815) – yvesr (1660), net–chess.com, 2001. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.c4 Ne4 6.Nc3 (6.d3 Ng5 7.b5+=) 6...Bf5 (6...Nc3!? 7.dc3 dc4 8.Qd8 Nd8 9.Bc4 Be6=) 7.Nd5 (better is 7.cd5 Nb8 8.Bb5 c6 9.dc6 bc6 10.Ne4 Be4 11.Bf1+/–) 7...Nf2?? (better is 7...Bd6+=) 8.Kf2+– Qh4 (8...Bd6 9.Nf3+–) 9.g3 Qg4 (9...Qd8+–) 10.Qg4 Bg4 11.Nc7 Kd7 12.Na8 Bd6 (12...Be7 13.b5 Na5 14.Be5+–) 13.Nb6! ab6 14.Be2 Bf5 15.Nf3 e4 16.Ng5 (16.Nh4 Be6 17.Bg7 Rg8+–) 16...Bg6 (16...f6 17.Nf7 Ra8 18.Nd6 Kd6 19.Rhd1+–) 17.Bg7 Re8 18.Rad1 (better is 18.Rhf1 Be5 19.Be5 Ne5+–) 18...Re5 (18...f6 19.Nh3+–) 19.Be5 Ne5 20.d4 White plans c5 (better is 20.Nh3 Nd3 21.Bd3 ed3+–) 20...Nc6 21.c5 bc5 22.dc5 Ne5 23.Rd6 Ke7 24.Rhd1 h6 25.Nh3 Bf5 26.Nf4 Bg4 27.Bg4 Ng4 28.Ke2 Nh2 29.Rd7 Kf6 30.R1d6 Ke5 31.Re7 Kf5 32.Rf7 Ke5 33.Ng6 1–0. rommeltdf (1780) – ofi, net–chess.com, 2002. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.c4 Be6 6.Nf3 e4 (6...dc4 7.b5 Na5 8.Be5+=) 7.Nd4 (7.Ng5 Bg4 8.Be2 Be2 9.Qe2 h6 10.cd5 Qd5+= (worse is 10...hg5 11.dc6 bc6 12.Nc3+/–)) 7...Nd4+= 8.Bd4 dc4 9.Nc3 Nd5 (better is 9...Be7!?+=) 10.Ne4= Bf5 (10...Nf4 11.Nc5 Bc5 12.Bg7+=) 11.Ng3 (11.Qf3 Be6+/–) 11...Bg6 (11...Bd3!?+/–) 12.Bc4 Qd6 (12...Nb6 13.Bb3+/–) 13.0–0 Qe6?? (better is 13...Nb6 14.Qf3 c6+–) 14.e4! Be4 15.Ne4 Qe4 (15...Qd7+–) 16.Re1 Ne3 (16...Qe1 17.Qe1 Ne7+–) 17.Re3 (17.Re3 Qe7 18.Qa4 c6 19.b5 Qe3 20.de3+–) 1–0. thedesertfox (1750) – choffman, net–chess.com, 2004. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.c4 Bf5 6.d3 (6.b5 Na5 7.cd5 Qd5 8.Nf3=) 6...Be7 (6...dc4 7.b5 Na5 8.e4–/+) 7.Nc3 (7.cd5 Qd5 (worse is 7...Nd5 8.b5 Na5 9.e4+–) 8.e4 Ne4 9.de4 Qe4 10.Qe2 Nd4 11.Qe4 Be4+=) 7...Bg4 (7...d4 8.Nd5 a6 9.Nf3=) 8.f3 (8.Be2 d4 9.ed4 Qd4 10.Bg4 Qg4 11.Qg4 Ng4 12.Nd5+=) 8...Bf5 (better is 8...Be6!?=) 9.cd5+/– Nd5 (better is 9...Nb8!?+/–) 10.Nd5+– Qd5 11.e4 Qe6 12.ef5 Qf5 13.Ne2 0–0–0 (13...a6 14.f4+–) 14.Ng3 (14.b5!? Nd4 15.Nd4 ed4+–) 14...Bh4+/– 15.Kf2 e4 16.Qd2 (16.de4?! Bg3 17.hg3 Rd1 18.ef5 Rd2 19.Ke3 Rb2=) 16...Rhe8 (16...ef3 17.gf3 (17.Bg7?! Rhg8 18.Bc3 Ne5=) 17...Nd4 18.Bd4 Rd4 19.Rc1+/–) 17.Re1+– Re6 18.Kg1 Bg3 19.hg3 ef3 (19...ed3 20.Rd1+–) 20.Re6 (20.gf3 Kb8+–) 20...fe6 (better is 20...fg2 21.Qg2 fe6+–) 21.Bg7 (21.gf3 Rd7+–) 21...Nd4? (better is 21...Rg8 22.b5 Qb5+/–) 22.Bd4+– Rd4 23.Kf2 (23.gf3 Qf3 24.Qf2 Qf2 25.Kf2 Rd7+–) 23...e5? (better is 23...fg2 24.Kg2 Qd5 25.Kg1 Qe5+–) 24.gf3 Kb8 25.g4 Qf7 26.Qh6 Rg4 27.Qh7 Threatening mate: Qxf7 27...Qa2 28.Ke3 Rg8 29.Rh6 Rc8 30.Bh3 Qa1 Do you see the mate threat? 31.Bc8?? Qe1 0–1. babai – scheisster, internet, 2007.

5.c4 Bg4 6.Qc2 Be7 7.b5 Na5 8.Be5 Nd7?? (better is 8...dc4 9.Bc3 c6 10.bc6 bc6=) 9.Bg7+– Rg8 10.Qh7 (10.Qh7 Rg7 11.Qg7+–) 1–0. Wall,Bill – Laprade,Maria, Palm Bay, FL, 2003.

5.c4 Bg4 6.Be2 dc4?? (better is 6...Be2 7.Ne2 dc4+=) 7.Bg4+– Ng4 8.Qg4 f5? (8...Qd3+–) 9.Qf5 Ne7 (9...Qd5 10.Nf3 g6 11.Qf6+–) 10.Qe5 Qd5 11.Qd5 (11.Nf3 c6+–) 11...Nd5 12.Nf3 Rd8 (12...a5 13.b5+–) 13.Nc3 Nf6 (13...Nb6 14.Rc1+–) 14.0–0–0 (14.Ne5 c6+–) 14...Bd6 15.Nb5 c3 (15...a6 16.Nd6 Rd6 17.Ne5+–) 16.Nd6 (16.dc3 a6 17.Nd6 cd6+–) 16...Rd6 17.Bc3 g5 (17...Ne4 18.Rdf1+–) 18.Bf6 (better is 18.e4!? Rc6+–) 18...Rf6 19.Ng5 Ra6 (19...Rf2 20.Rhg1+–) 20.Kb2 Rg8 21.f4 Rb6 (21...h6 22.Ne4 Rg2 23.f5+–) 22.g3 Rb5 (22...h6 23.Ne4+–) 23.Kc3 (23.Nh7 Rg6+–) 23...Rd5 (23...h6 24.Nf3+–) 24.Nh7 Rg7 (24...Rg6 25.d4 Ra6+–) 25.Nf6 Ke7 26.Nd5 Ke6 27.e4 Rd7 28.d4 Rd5 (28...Rd5 29.ed5 Kd5+–). rommeltdf (1800) – dschultz, net–chess.com, 2002. (=1.a3 e5 2.b4 Nc6 3.e3 d5 4.Bb2 Nf6)

5.d3 Bd6!? +=.

5.d3 g6 6.Nf3 Bf5 7.Be2 (7.b5 Nb8+/–) 7...a5 8.c3 (8.b5!? Na7 9.Ne5+/–) 8...ab4 9.cb4 Be7 (9...Bd6 10.b5 Na7 11.Ne5 Nb5 12.g4+=) 10.Nbd2 (10.Ne5 Ne5 11.Be5 0–0+/–) 10...0–0 (10...Bd6 11.b5 Na7 12.Ne5 Nb5 13.g4+=) 11.0–0 Nd4?? (better is 11...e4 12.de4 de4+=) 12.ed4+– ed4 13.Nd4 Bd3 (13...Bd7+–) 14.Bd3 Qd6 15.N2f3 Ne4 16.Be4 (16.Qc2 c5 17.Be4 de4 18.bc5 Qd5+–) 16...de4 17.Nd2 Qd4 (17...f5+–) 18.Bd4 Bg5 19.Bb2 (better is 19.Ne4!? Be7 20.Qc1 c5 21.Bc5 Bc5 22.bc5 Rfd8+–) 19...Bd2 20.Bc1 (better is 20.Qd2 Rae8+–) 20...e3 (20...Bc3 21.Rb1 Rfe8 22.Qb3+–) 21.fe3 Bc1 22.Qc1 Rfd8 23.Re1 Re8 24.Qb2 Re4 25.Qe2 Rd8 26.Rad1 Ra8 27.Rd4 Re3 28.Qe3 Ra5 29.ba5 b6 30.ab6 cb6 31.Qe7 b5 32.Qe8 1–0. Fournier,Frederic (1915) – desigallango, Active Blind, 2007.

5.d4 ed4 6.b5 de3 7.bc6 ef2 8.Kf2 Ne4 9.Ke2 bc6 10.Qd4 +=.

5.d4 ed4 6.Nf3 de3 7.Nd4? (better is 7.fe3 Ng4 8.b5 Ne3 9.Qc1–+) 7...ef2 (7...Ne4!? 8.fe3 Qh4 9.g3 Ng3 10.hg3 Qh1 11.Nc6 bc6 12.Qd4–+) 8.Kf2 Ne4 9.Ke3 (9.Kg1 Qf6 10.Qf3–+) 9...Bd6 (better is 9...Qg5 10.Ke2 Qf6 11.Nf3 Qb2 12.Qd5 Qc2 13.Ke3–+) 10.b5 (10.Qe1 Qg5 11.Ke2–+) 10...Qg5 11.Kd3 Nf2 (11...Bg4 12.Nf3 Ne5 13.Be5 Nf2 14.Kc3 Qe3 15.Bd3 Be5 16.Kb3 Nd1 17.Nc3 Bc3 18.Rad1–+) 12.Ke2 Bg4 (12...Nd1 13.Nf3 Bg4 14.Kd1–+) 13.Nf3 (13.Kf2 Bd1 14.bc6 bc6–+) 13...Nd1 14.Kd1 Ne5 (14...Qe3 15.Nbd2 Nd4 16.Bd3 Bf3 17.Nf3 Nf3 18.gf3 Qf3 19.Kd2 Qf4 20.Kc3–+) 15.Be2 Nf3 16.gf3 Bf3 17.Bf3 0–0 18.Nc3 Rae8 19.Nd5 c6 20.bc6 bc6 21.Nc3 Rd8 22.Bc6 Bh2 23.Nd5 Qg4 24.Kd2 Qg2 25.Kc3 Be5 26.Kc4 Qc2 27.Bc3 Bc3 28.Ne7 Kh8 29.Rag1 Bf6 30.Kb5 Be7 31.Rg4 Qc5 32.Ka6 Qc6 0–1. klittlefield – dengel, net–chess.com, 2000.

5.d4 e4 6.Bb5 (6.c4 Bg4 7.Qc2 Ne7=) 6...a6 7.Bc6 bc6 8.Ne2 Bg4 (8...Rb8 9.Nd2=) 9.h3 Be2 (9...Bc8 10.Nd2=) 10.Qe2 Bd6 (10...Qb8 11.Nd2=) 11.0–0 (11.c4 a5+=) 11...g6 (11...0–0 12.c4+=) 12.c4+= 0–0 13.c5 Be7 14.Nd2 Nh5 15.f3 (15.g4 Ng7=) 15...f5 (15...Ng3 16.Qf2 Nf1 17.Rf1–+) 16.fe4 (16.Qe1 Rb8+=) 16...fe4?? Black creates threats along the open f–file (better is 16...Ng3 17.Qd3 Nf1 18.Rf1 fe4–+) 17.Rf8 Qf8 18.Rf1 (18.Re1 Qf6=) 18...Qg7 (18...Qh6 19.Kh2=) 19.Qg4 Rf8 (19...Kh8 20.Qe6 Bg5 21.Re1=) 20.Qe6+/– Rf7 (20...Kh8 21.Rf8 Qf8 22.Qe5 (22.Qc6 Bh4 23.Kh1 Qf2 24.Qe8 Kg7 25.Ne4 de4 26.Qe7 Be7 27.d5 Qb2 28.d6 Ng3 29.Kh2 Nf1 30.Kg1 Ne3 31.de7 Qg2) 22...Bf6 23.Qc7+/–) 21.Rf7 (21.Qc6 Ng3 22.Qe8 Rf8 23.Rf8 Qf8 24.Qf8 Kf8+=) 21...Qf7+= 22.Qc6 (22.Qc8 Kg7 23.Qa6 Ng3+/–) 22...Bg5 (22...Bh4 23.Kh1 Be1 24.Ne4 de4 25.Qa8 Kg7 26.d5 Kh6 27.Qa6 Qd5 28.Qc8–+) 23.Nf1= Bh4 24.Qa8? (24.g3 Ng3 25.Qa6=) 24...Kg7–+ Threatening mate... how? 25.Qa6 Bf2 (25...Qf2 26.Kh1 Ng3 27.Ng3 Bg3–+) 26.Kh1+– Ng3 (26...Be3 27.Ne3 Qf2 28.Bc1 Ng3 29.Kh2+–) 27.Ng3 Bg3 28.b5?? (better is 28.Qe2+–) 28…Qf1 0–1. CSLewis – xyzzy, ChessWorld.net, 2005.

5.Ne2 Bd6 6.Ng3 +=.

5.Ne2 Bg4 6.h3 (6.b5 Na5 7.Be5 Nc4+=) 6...Bh5 (6...Be2 7.Be2 Bd6 8.0–0=) 7.Nbc3 (7.b5!? Na5 8.Be5+=) 7...d4+= 8.ed4 Nd4 9.g4?? (9.f3 Bg6 10.Nd4 Qd4+=) 9...Bg6 (9...Nf3) 10.Rg1?? (better is 10.Nd4 Qd4 11.Bg2=) 10…Nc2 (10...Nc2 11.Qc2 Bc2–+; 10...Nf3) 0–1. keeder – Zbicyclist, ChessWorld.net, 2010.

5.Nf3 d4 6.ed4 (6.b5 Na5+=) 6...ed4 (6...e4 7.Qe2 Be7 8.Ne5+=) 7.Qe2 (7.Bb5 Qd5 8.Qe2 Kd8+/–) 7...Be7+= 8.d3 (better is 8.b5 Nb8 9.Bd4+=) 8...0–0–/+ 9.Nbd2 Re8 10.0–0–0 (better is 10.Ne4 b5 11.Rc1–/+) 10...a5 11.ba5 Ra5 (11...Nd5 12.Ne4–+) 12.Nb3 (12.Ne4 Ng4 13.h3 Nge5–+) 12...Ra6 (12...Ba3?! 13.Na5 Re2 14.Nc6 Bb2 15.Kb2 Rc2 16.Kc2 bc6 17.h3–+) 13.Nfd4 (13.Qd2 Ba3 14.Ba3 Ra3 15.Kb2–+) 13...Nd4 14.Nd4 (14.Qd2 Ba3 15.Ba3 Ra3–+) 14...Ba3 (14...Ra3?! 15.Qf3–+) 15.Ba3 Ra3 16.Nb3 Bg4 (16...Bg4 17.Qd2 Bd1 18.Qd1 Nd5–+) 0–1. Fournier,Frederic (1930) – Viktor7 (1770), Active, 2004.

5.Nf3 Be6 6.Ne5+= Bd6 7.Nc6 bc6 8.Be2 0–0 9.d3 (9.0–0 c5+=) 9...Re8 10.Nd2 Bf5 (10...c5 11.bc5 Bc5 12.c4+=) 11.Nf3 Qe7 12.0–0 Be5?? (better is 12...a5+/–) 13.Ne5 Ng4 (13...Qd6 14.Nf3+–) 14.Nc6 (14.Bg4 Bg4 15.Qg4 Qe6+–) 14...Qe6 (14...Qg5 15.Nd4 Bd7 16.Nf3+–) 15.Bg4 (better is 15.Nd4 Ne3 16.Qc1 Qg6 17.fe3 Bh3+–) 15...Bg4 16.f3 (16.Nd4!? Qg6 17.Qd2 Rab8+–) 16...Bh5 (16...Qe3 17.Kh1 Bd7 18.Nd4+–) 17.Nd4 Qg6 (17...Qe3 18.Kh1 f6 19.Re1+–) 18.Ne2 (better is 18.g4!? Qg5 19.Nf5 f6+–) 18...Re3 19.Ng3 (19.g4 Bg4 20.fg4 Qg4 21.Kf2 Rh3+–) 19...Rae8 (19...Qb6 20.Kh1 (20.Nh5?! Re1 21.Kh1 Rd1 22.Rfd1 d4+–) 20...Bg6 21.Ne2+–) 20.Nh5 (20.Bd4 R3e6+–) 20...Qh5 21.Bd4 R3e6 22.Qd2 Rh6 23.h3 Qh4 24.Rae1 Qd4+/– 25.Kh1 Re1 26.Re1 f6? 27.Qe3 Qe3+/– 28.Re3 Kf7 29.c3 f5 30.Kg1 Ra6+/– 31.Re5 Ra3 32.Rf5 Ke6= 33.Rg5 g6 34.Rg4 Rc3+= 35.d4 Rb3–+ 36.Kf2 Rb4 37.Rh4 a5 38.Rh7–/+ a4 39.Rc7 a3 40.Ra7 Rb2 41.Kg3 a2 42.Ra6 Kf5 43.h4 g5 44.hg5 Kg5= 45.Kh3 Kf4 46.Ra5? Ke3–/+ 47.Ra4 Rd2 48.g4 Rd4 49.Ra2= Kf3 50.Ra3 Kf4 51.Rg3 Kg5 0–1. Fournier,Frederic (1915) – domimus, Active, 2005.

5.Nf3 Be6 6.Ne5+= Ne5 7.Be5 Bd6 8.Bb2 0–0 9.f4 Ne4 10.Be2?? (better is 10.Qh5=) 10...Qh4–+ 11.g3 Ng3! 12.hg3 (12.hg3 Qh1 Pinning (12...Qh1 Deflection)) 12...Qh1 13.Kf2 (13.Bf1–+) 13...Qh2 14.Kf1 (14.Kf3 g5! 15.e4 Bf4 16.gf4 de4 17.Ke3 Qf4 18.Kd4 Rad8 19.Kc3 Qe5 20.d4 ed3 21.Kd2 de2 22.Bd4 Rd4 23.Ke1 Qg3 24.Ke2 Re4 25.Kd2 Qe3) 14...Bh3 15.Ke1 Qg1 (15...Qg3) 16.Bf1 Qf1 0–1. Fournier,Frederic – fritzman, Active, 2007.

5.Nf3 Be6 6.Ne5+= Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.d4 +=.

5.Nf3 Qe7 6.Be2 (6.b5!? Na5 7.Ne5+/–) 6...e4= 7.Nd4 Bd7 8.0–0 0–0–0 9.c4 Nd4 10.Bd4 dc4 11.Bc4 (worse is 11.Ba7 b6 12.Qc2 Be6+=) 11...Bc6 (11...Be6 12.Qc2 Bc4 13.Qc4 Ng4=) 12.Bc5 (12.b5!? Bd7 13.Nc3+/–) 12...Qe5= 13.Bd4 Qd6 (13...Rd4!? 14.ed4 Qd4=) 14.Bf7 Rd7 (14...Bb5 15.Re1+/– (worse is 15.Ba7 Bf1 16.Qf1 b6+=)) 15.Bb3 Be7 (15...h5 16.Nc3 (16.Ba7?! b6=) 16...Ng4 17.g3+/–) 16.Bc5 (better is 16.Nc3!?+–) 16...Qe5+= 17.Nc3 (17.Be7 Qe7 18.Qe2 Rhd8+=) 17...Bc5= 18.bc5 g5 (worse is 18...Qc5 19.Be6+–) 19.a4 b6? (19...Kb8!?=) 20.a5 g4? (better is 20...b5!?+/–) 21.ab6+– ab6 22.Ra7 (22.cb6 cb6 23.Ba4 Kb7+–) 22...bc5? (22...Kd8 23.cb6 cb6 24.Ra6+–) 23.Qa1 (better is 23.Ba4!? Bd5 24.Qa1+– (24.Bd7?! Kd7 25.Nd5 Qd5+–)) 23...g3?? (better is 23...Rdd8+–) 24.Ra8! 1–0. pieeater – allknight, ChessWorld.net, 2011.

5.Nf3 Bf5 6.Bb5 Bb4?? (better is 6...e4 7.Ne5 Qd6=) 7.ab4+– 0–0 8.0–0 (better is 8.Bc6 bc6 9.Be5+–) 8...Nb4 9.Ba4 Nc2?? (better is 9...e4 10.Nd4 Bd7+–) 10.Bc2+– e4 11.Ne5 d4 (11...c5 12.f3+–) 12.Bd4 c5 (12...Qd6 13.Nc3 c5 14.Nc4+–) 13.Bb2 (13.Bc5!? Qc7 14.Bd4 Rfe8+–) 13...Qd6 14.Na3 Ng4 (14...Rfd8 15.Nec4 Qe6 16.f3+–) 15.Nac4 (15.Ng4!? Rfd8 16.Ne5 Qd2+–) 15...Qh6 (15...Qe6 16.f3 Ne5 17.Ne5 (17.Be5?! Qc4 18.fe4 Bg6+–) 17...ef3 18.Bf5 (18.Qf3?! Bc2 19.Rfc1 Qb3+–; worse is 18.gf3 b5+–) 18...Qf5 19.Nf3+–) 16.h3 (16.Ng4!? Qe6 17.Nge5 b5+–) 16...Nf6 (16...Ne5 17.Ne5 (worse is 17.Be5 Qe6+–) 17...Qb6 18.Qb1+–) 17.Nd6 Bh3 (17...Be6+–) 18.Nef7 (better is 18.gh3 Qh3 19.Ne4+–) 18...Rf7? (18...Qg6 19.g3 Rf7 20.Bb3+– (20.Nf7?! Qf7 21.Re1 Ng4+–)) 19.Nf7 (better is 19.gh3 Qg6 20.Kh2 Ng4 21.Qg4 Qd6 22.Kh1 Re7+–) 19...Kf7?? (19...Qg6 20.g3 Qf7+–) 20.Bf6 Qf6 21.gh3 Qg5 22.Kh2 Re8 23.Rg1 Qe5 24.Kh1 Kg8 25.Rg7! Kg7 26.Qg1 Kh8 27.Ra7 Rg8 28.Qb1 Qg5 29.Qb2 Rg7 30.Ra8 Qd8 31.Rd8 1–0. pieeater – interloper, ChessWorld.net, 2011.

5.Nf3 Bf5 6.d3 Bd6 7.Be2 (7.b5 Nb8 8.Be5 Be5 9.Ne5 Nbd7+=) 7...0–0 (7...Qe7 8.0–0+=) 8.0–0 (8.b5 e4 9.Nh4 Ne7+=) 8...d4 (8...Qe7 9.Nbd2+=) 9.e4 (9.b5!? Ne7 10.ed4 ed4 11.Bd4+/–) 9...Bg4 10.h3 Bh3?? (better is 10...Be6=) 11.Ng5?? (better is 11.gh3!? Qd7 12.Kg2+–) 11...Bg2?? (better is 11...Bd7–/+) 12.Kg2+= Qc8 13.Rh1 Qd8 14.Rh4 Be7? 15.Qh1+/– h6 16.Nd2?? h5?? 17.Bh5+– Nh5 18.Rh5 g6 19.Rh8 Kg7 20.Qh7 Kf6 21.Rf8 Qf8 22.Nf1 Kg5= 23.Bc1 Kg4?? 24.f3 1–0. pieeater – interloper, ChessWorld.net, 2011.

5.Nf3 Bf5 6.Ne5 Ne5 7.Be5 Qe7 8.Bb2 0–0–0 9.Bd4 Qe6 10.Be2 Be4 11.0–0 Bd6 12.c4 (12.Nc3 Be5+/–) 12...Rhe8 (12...dc4 13.Nc3 (13.Ba7? Qe5 14.Bg4 Nd7–+) 13...Bd3 14.Bd3 cd3 15.Qa4+/–) 13.f3 Bf5 14.Nc3 c6? (better is 14...Be5!? 15.Be5 Qe5+/–) 15.cd5 cd5 (better is 15...Nd5 16.Nd5 Qd5 17.Ba7 Bc7+–) 16.Ba7 Be5 (16...Re7 17.Nb5 Bc7 18.Bc5+– (worse is 18.Nc7 Rc7 19.Rc1 Ne8+–)) 17.Rc1 Bc7 18.Qa4 Qe5 (18...Rd6+–) 19.f4 (19.f4 Qe7 20.Bc5+–) 1–0. ekosachro (2160) – angelbearoh, net–chess.com, 2014. (=1.a3 e5 2.e3 Nc6 3.b4 d5 4.Bb2 Nf6)

5.Nf3 Bg4 6.Be2 Bd6 7.0–0 Bf3 8.Bf3 0–0 9.Nc3 e4 10.Be2 a6 11.d4 b5 12.Qd2 Re8 13.Rad1 Qd7 14.g3 g6 15.Kg2 Reb8 (15...Ne7!?+=) 16.f3= Re8 (16...ef3!? 17.Bf3 Qe6+/–) 17.fe4+/– Ne4 18.Ne4 Re4 19.Bf3 Ree8 20.Bd5 Re7?? (20...Bb4 21.Bf7 (worse is 21.ab4 Qd5 22.Kg1 a5–/+) 21...Qf7 22.Rf7 Bd2 23.Rc7=) 21.Bc6 (21.Qc3 Bb4 22.Qc6+– (worse is 22.ab4 Qd5 23.Kg1 a5+=)) 21...Qc6+/– 22.d5 Qd7 23.Qd4?? (better is 23.Bf6 Re4 24.Rf3+/–) 23...Be5–/+ 24.Qc5? (better is 24.Qe5 Re5 25.Be5–/+) 24...Bb2–+ 25.Rd3 Rc8 26.Qa7 Qd6 27.c3 c6 28.Qa6 Qe5 29.Re1 cd5 30.Qb5?? Rd8 31.c4?? Bc3 32.a4?? Be1 33.cd5 Rb8 34.Qc6 Qe4 (34...Qe4 35.Kg1 Qd3–+) 0–1. Neumann,Frank – Bokros,Csaba, RN–2012–0–00484, 2012.

5.Nf3 Bg4 6.Be2 Bf3 7.Bf3 e4 8.Be2 Be7 9.0–0 0–0 10.d3 Re8 11.de4 (11.b5 Nb8+=) 11...de4 (11...Ne4 12.b5 Na5 13.Nd2=) 12.Qd8 (12.b5 Nb8=) 12...Rad8= 13.c4 h6 14.Nc3 (14.Bc3 Bd6=) 14...Rd2 15.Rab1 Red8 (15...a5 16.ba5 Na5 17.Rfd1+=) 16.Rfd1 Rd1 (16...Rc2 17.Kf1 Ne5 18.Rd8 Bd8 19.Ba1+=) 17.Rd1+= Rd1 18.Bd1 Ne5 19.c5 (19.Ne4 Nc4 20.Nf6 gf6+/–) 19...Nd3 20.Ba1 c6? (20...a5 21.c6 bc6 (21...ab4? 22.cb7 Nd7 23.ab4+–) 22.ba5 Ba3+=) 21.Bc2+– b6 22.cb6 ab6 23.Kf1 (23.Ne4 Ne4 24.Bd3 Nf6+–) 23...c5? (23...Ng4 24.Ne4 Ndf2 25.Ke2 Ne4 26.Be4=) 24.bc5 (24.Ne4 Ne4 25.Bd3 Nd6+–) 24...bc5 (24...Nc5 25.Nb5=) 25.a4 (better is 25.Ne4 Ne4 26.Bd3+–) 25...c4= 26.a5 Nd7? 27.Nd5 Bc5+/– 28.Ba4 N7e5 29.Bd4 Bd4 30.ed4+– Nc6 31.Bc6 f5 32.a6 Nb2 33.a7 c3 34.Nc3 1–0. thedesertfox (1750) – dbeckett (1685), net–chess.com, 2004. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6)

5.Nf3 h6 6.Be2 (6.Ne5!? Ne5 7.Be5+/–) 6...Bd6 7.0–0 0–0 (7...Qe7 8.d4=) 8.d3 (8.b5!? e4 9.bc6 ef3 10.cb7 Bb7 11.Bf3+=) 8...a6 9.Re1 b5 10.Nc3 Bg4 11.h3 Bh5 12.Qd2 e4 13.de4 de4 14.Nh4?? (14.Nd4 Be2 15.Qe2 Ne5+=) 14...Be2 (better is 14...Bh2! 15.Kh2 Qd2–+) 15.Re2 Ne5 16.Nf5 Nc4 17.Qc1 Qc8 18.Nd4 (better is 18.Nd6 cd6 19.Nb1+=) 18...Nh5?? (18...c5 19.bc5 Qc5 20.Re1–/+) 19.Nc6?? (better is 19.Ne4 Be5 20.a4+/–) 19...Qf5 20.Ra2 Rae8 21.Qd1 Re6 22.Nd5 Kh7 23.c3? Rg6–+ 24.Nde7?? Be7 25.Ne7–/+ Rg2 26.Kg2 Qf3 27.Kg1 Qh3 28.Qd5 Qf3?? 29.Nf5?? Qe2–+ 30.Qe4 g6 31.Nh4?? Nf6 32.Qd4 Ng4 33.Qf4 Nce5 34.c4 Nc4 35.Qd4 Qf2 36.Kh1 Qh2 0–1. pieeater – calchess10, ChessWorld.net, 2011.

5.h3 Be7 6.Nf3 (6.b5 Na5 7.Be5 Nc4 8.Bc4 dc4+=) 6...Bd6 (6...e4 7.Nd4+=) 7.c4 (7.b5 e4 8.bc6 ef3 9.Qf3 bc6 10.Bf6 Qf6 11.Qf6 gf6+=) 7...Be6 (7...e4 8.Nd4 Nd4 9.Bd4 dc4 10.Bc4+=) 8.cd5 (better is 8.c5!? Be7 9.Ne5 Ne5 10.Be5+=) 8...Bd5+= 9.Be2 (9.Nc3 Be6=) 9...0–0 10.0–0 Ne4 (10...Bf3 11.Bf3 e4 12.Be2=) 11.Nc3 (11.b5 Na5 12.d4 Nb3 13.de5 Be7= (13...Na1? 14.ed6 Qd6 15.Qd4+–)) 11...Nc3+= 12.Bc3 f5 (12...e4 13.Ne1+=) 13.Rc1 (better is 13.b5!? e4 14.bc6 ef3 15.Bf3 bc6 16.d3+=) 13...e4+= 14.Nd4 Qg5 (14...Nd4 15.Bd4 a5 16.d3+=) 15.Nc6= bc6 (15...Bc6 16.Qb3 Kh8 17.b5=) 16.f4 ef3 17.Bf3 Qg3 18.Bd5 cd5 19.Rf3 (better is 19.Qf3!? Qf3 20.Rf3+=) 19...Qh2–/+ 20.Kf1 Bg3 21.Qc2?? (better is 21.Bd4–/+) 21...Qh1–+ 22.Ke2 Qg2 (22...Qg2 23.Kd3 Qf3–+) 0–1. thedesertfox (2100) – tahafathi (2185), net–chess.com, 2004. (=1.a3 e5 2.b4 Nf6 3.Bb2 Nc6 4.e3 d5)

5.b5 Na5

6.d4 ed4 7.Bd4= Bf5 (7...Nc4 8.Nc3 Be6 9.Bc4 dc4 10.Qf3+=) 8.Bd3 Bg4 9.f3 Bd7 (9...Be6 10.Bc3 c6 11.Qd2+=) 10.Ne2 c5 (10...Nc4 11.Nec3=) 11.bc6+= Nc6 12.Bb2 (12.0–0 Nd4 13.Nd4 Bd6=) 12...Qe7 13.Qd2 0–0–0 (13...Rc8 14.Nd4=) 14.0–0 (14.Nd4 Re8 15.Kf2 Nd4 16.Bd4 b6+=) 14...Re8 15.Kf2 Kb8 16.Nf4 (16.Nd4 Ne5=) 16...Qd6 17.Bb5 Attacks the isolani on d5 (17.Kg1 d4 18.Re1 g5–/+) 17...h6 (17...Ne5 18.Be5 Qe5 19.Bd7 Nd7 20.Nc3=) 18.c4 dc4 (18...a6 19.Bc6 bc6 20.Rd1+=) 19.Rd1 (19.Bf6 gf6 20.Bc4 Be6+=) 19...Qd2= 20.Nd2 White fights for the Initiative (worse is 20.Rd2 Bc5 21.Re2 Ne5 22.Be5 Re5 23.Bc4 Rhe8–+) 20...c3 (20...Na5 21.Bc4 Bc5 22.Bd4 Bd4 23.ed4 Nc4 24.Nc4+=) 21.Bc3+= Bc5 22.Nc4 Rd8 (22...Be6 23.Ne6 Re6 24.Bf6 Rf6 25.Rd5+/–) 23.Rab1 Ka8 24.Nd3 (24.Bf6 gf6 25.Rd5 Be7+/–) 24...Be7 25.e4 Nd4? (25...Be6 26.Kg1+/–) 26.Bd7+= (26.Bd4?! Bb5 27.Nb6 ab6 28.Bf6 Bd3 29.Be7 Bb1 30.Bd8 Bc2+–) 26...Rd7 27.Nde5 Nb5 28.Rd7 Bc5 29.Ne3 Nc3 30.Rbb7 Nd7 31.Rd7 f6 32.N5c4 g5 33.Kg3 Ne2 34.Kg4 h5 35.Kf5 Rh6 36.e5 Nd4 37.Ke4 fe5 38.Ke5 Nc6 39.Kf5 Be7 40.Ke4 Ba3+/– 41.Nf5 Bf8 42.Nh6 Bh6 43.Rd6 Kb7 44.Rh6 Nd8 45.Nd6 Kc6 (45...Kc7 46.Nb5 Kb7 47.Rh5+–) 1–0. SuperForte 5 Mhz – GrandMasterChess 80286, 1994.

6.d4 e4 7.Qd2 Nc4 8.Bc4 dc4 9.Ne2 +=.

6.Be5 Ne4 7.Nf3 Bd6 (7...f6 8.Bc3 c6 9.Nd4+/–) 8.Bd6 (better is 8.Bg7!? Rg8 9.Bb2+–) 8...Qd6+/– 9.d3 Bg4?? (better is 9...Qf6 10.Ra2 Be6+/–) 10.de4+– 0–0–0 (10...de4 11.Qd6 cd6 12.Nd4+–) 11.ed5 Rhe8 (11...Bf3 12.Qf3 Qd5 13.Qd5 Rd5 14.Bd3+–) 12.Be2 (better is 12.Nc3 Kb8+–) 12...Re5 (12...Qd5 13.Qd5 Rd5+–) 13.Ne5 Be2 14.Ke2 (better is 14.Qd4 Qd5 15.b6 ab6 16.Ke2 Qg2 17.Qg4 Qg4 18.Ng4 Nc6+–) 14...Qe5 15.Nd2 (15.Qd4!? Qd4 16.ed4 Rd5+–) 15...Rd5 16.Qc1 Qh5 17.f3 Qg5 18.Kf2 Qh4 19.g3 Qh3 (19...Qd8 20.Rd1 Rb5 21.Rb1+–) 20.Ne4 (better is 20.c4 Rd3 21.Qc2 Qd7+–) 20...Nc4 21.Qf1 Nd2 (21...Qf1 22.Rhf1 Rb5+–) 22.Qh3 (22.Qh3 f5 23.Rad1 Rb5 24.Rd2+–) 1–0. Fournier,Frederic – pasdibe, Active, 2007.

6.Be5 Qe7 7.Bb2 Qd6 8.Nf3 Be7 9.d4 0–0 10.Nbd2 Bg4 11.Be2 Ne4 12.h3 Nd2 13.Qd2 (worse is 13.Kd2 Bf3 14.gf3 Nc4 15.Bc4 dc4=) 13...Bf3 14.Bf3 Nc4 15.Qc3 Nb2 (15...Qd7 16.a4+=) 16.Qb2+/– a6 17.ba6 Ra6 (17...Qa6 18.a4+=) 18.0–0 c6 (18...Rb8!?+/–) 19.Qb7+– Ra3? (better is 19...Raa8 20.Bg4 Rfb8+–) 20.Ra3 Qa3 21.Qc6 Rd8 22.Bd5 Qa7 23.c4 Qb8 24.Qb7 Qd6 25.Bf3 (25.Ra1 g6+–) 25...Bf6 (25...Rb8 26.c5 Qd8 27.Qd5+–) 26.c5 Qe6 27.Qc6 (27.c6 Re8 28.Bg4 Qe4+–) 27...Qe7 (27...Qa2 28.Rd1+–) 28.Qb5 g6 29.c6 Qc7 (29...Rc8 30.Ra1 Qf8 31.Ra7+–) 30.Qb7 Rc8 31.Qc7 (31.Ra1!? Bd8+–) 31...Rc7 32.d5 Be7 33.Rd1 Bd6 34.Rb1 Kg7 35.Rb7 Kf6 36.g3 Rb7 37.cb7 Ke7 38.e4 Kd8 39.Kf1 Kc7 40.Ke2 Kb7 41.Kd3 Kc7 42.Kd4 f6 43.Bg4 h6 44.f4 White prepares e5 44...g5 45.e5 fe5 46.fe5 Bf8 47.d6 Kd8 48.Kd5 Ke8 49.Bh5 Kd8 50.e6 Kc8 51.e7 Be7 52.de7 Kd7 53.e8Q 1–0. Fournier,Frederic (1905) – aresess (1720), Active, 2011.

6.Be5 Qe7 7.Nf3 c6 8.Nc3 Nc4 (8...Ne4!?+/–) 9.Bc4+– dc4 10.bc6 bc6 11.Qe2 Bg4 12.Qc4 Bf3 13.gf3 Rc8 14.Qa6 Qe6 (14...Kd8 15.Bd4+–) 15.Bf6 gf6 16.Qa7 Bg7 17.Rg1 0–0 18.Rb1 Kh8 19.Rb7 Ra8 20.Qc5 f5 21.a4 Be5 (21...Rfb8 22.Rb8 Rb8+–) 22.Re7 Bd6 (22...Ra5 23.Nb5 Qd5 24.Qd5 cd5 25.Re5 Ra4 26.Ke2+–) 23.Qd4 Be5 24.Qe5 Qe5 25.Re5 f6 (25...Rfb8 26.Ke2+–) 26.Rf5 Rab8 (26...Rf7 27.Ke2+–) 27.d4 Rb2 (27...Ra8 28.a5+–) 28.Kd2 Rf7 29.Ne4 Ra2 (29...Rg7 30.Rg3 Rg3 31.fg3 Kg7+–) 30.Rf6 Rf6 (30...Ra3 31.Rf7 Rd3 32.Kd3 h5 33.Rf5 h4 34.Rh5) 31.Nf6 1–0. Fournier,Frederic (2125) – slash25(C) (1725), Active, 2006.

6.Be5 Be7 7.Nf3 (7.Qf3 Be6+/–) 7...Bd7 (7...0–0 8.d4+=) 8.Bc3 (8.Nc3 0–0+/–) 8...Nc4+= 9.Bc4 dc4 10.Nd4 0–0 (10...a6 11.a4+=) 11.Qe2+/– c6 (11...a6 12.Qc4 ab5 13.Nb5+/–) 12.bc6 Bc6 (12...bc6 13.Qc4 c5 14.Nf3+/–) 13.Nc6+– bc6 14.Qc4 Rc8 (14...Qd6 15.0–0+–) 15.0–0 Nd5 16.Bb2 Nb6 (16...Rb8 17.Bd4 Bf6 18.Nc3+–) 17.Qg4 g6 (17...Bf6 18.Bf6 Qf6 19.Nc3+–) 18.d3 h5 (18...f5 19.Qf3+–) 19.Qf3 Re8 (19...Qd5 20.e4 Qc5 21.Bc3+–) 20.Nd2 c5 (20...h4 21.Ne4 f5 22.Nc3+–) 21.Ne4 (21.Rfd1 Qc7+–) 21...c4 (21...f5 22.Nc3+–) 22.Qf4 (better is 22.Rfd1+–) 22...cd3?? (better is 22...Nd5 23.Qg3 h4+–) 23.Qh6 f6 (23...Bf6 24.Bf6 Qf6 25.Nf6) 24.Qg6 Kh8 (24...Kf8 25.Ng5! fg5 26.Qg7) 25.Ng5 1–0. Wall,Bill – Lantic, internet, 2004.

6.Be5 Bg4 7.Be2 Nc4 8.Bd4 Be2 9.Ne2 +/– (worse is 9.Ke2 Be7=).

6.Be5!? Bg4 7.Nf3 +=.

5.b5 Ne7

6.Be5 b6 7.Bf6+/– gf6 8.Nc3 (8.Nf3 a6+–) 8...Bg7 9.Nf3 f5 10.d4 Bb7 (10...a6 11.ba6 0–0 12.Bd3+/–) 11.Bd3+– 0–0 (11...a6 12.a4+–) 12.0–0 (12.Ne2 a6+–) 12...f4 (12...a6 13.a4+–) 13.Ng5 (better is 13.ef4 a6 14.ba6 Ba6 15.Re1 Bd3 16.Qd3+–) 13...fe3?? (13...h6 14.Qh5 fe3 15.fe3 Qe8 16.Nf7 Rf7 17.Rf7 Qf7 18.Bh7 Kf8+–) 14.Bh7 Kh8 15.Qh5 1–0. Wall,Bill – Pitts, internet, 2000.

6.Be5 c6 7.Bf6 gf6 8.Nf3 Bg7 9.d4 Bg4 10.bc6 bc6 11.Nbd2 0–0 (11...Qa5 12.Be2+/–) 12.Bd3 Re8 13.0–0 Bf5 14.Bf5 Nf5 15.c4 Rb8 16.Qa4 Qc7 17.Rfc1 dc4 18.Qc4 Ne7 19.Rab1 Rb1 20.Rb1 Rb8 21.Rb8 Qb8 22.Qc5 Bf8 23.h3 Ng6 24.Qc6 Bd6 25.a4 f5 26.Qd7 f4 27.e4 Ne7 (27...Qc7 28.Qc7 Bc7 29.Nb3+–) 28.e5 Bb4 29.Ne4 Qa8 (29...Kg7 30.Nf6+–) 30.d5! Nd5 (30...Qd5 31.Nf6) 31.Qd5!! (31.Qd5 Qd5 32.Nf6 Kf8 33.Nd5+–) 1–0. Trkn – guest5328, ICC, 2004.

6.Be5 Qd7 7.Nf3 Qe6? (7...Ne4 8.d3 Nd6 9.c4+/–) 8.Nc3 (8.Bc7!? Nf5+–) 8...c6 9.bc6 bc6 10.Be2 Ng6 11.Bg3 Bd6 (11...Bc5 12.0–0+/–) 12.Bd6 (better is 12.Nd4!? Qd7 13.Nc6 Bg3 14.hg3+–) 12...Qd6+/– 13.0–0 0–0 14.d4 Ne4 15.Ne4 de4 16.Nd2 Re8 17.c4 c5 18.d5 Rb8 19.Rb1 Ba6 20.Rb8 Qb8 21.Qb3 Qd6 22.Rb1 f5 23.g3 Ne5+/– 24.a4 Nf3? 25.Nf3+– ef3 26.Bf3 f4 27.ef4 Qg6 1–0. Fournier,Frederic (1740) – ORCAS8, Active, 2011.

6.Be5 Nd7 7.Bb2 Nf5 8.Nf3 Nf6 9.c4 Be7 10.Be2 0–0 11.0–0 c6 12.bc6 bc6 13.cd5 cd5 14.Nc3 Bb7 15.d4 Ne4 16.Ne4 (16.Qa4 Qd6+/–) 16...de4 17.Ne5 f6? (17...Bd5 18.Qa4+/–) 18.Nc4 (better is 18.Qb3!? Bd5 19.Bc4+–) 18...Bd5 19.Rc1 Rc8 20.Qa4 Bc6 (better is 20...Rc7!?+/–) 21.Qa7+– Rc7 22.Qb6 Qc8?? (22...Bd5 23.Qa5 Rb7 24.Rc2+–) 23.Qa5 (better is 23.Na5!? Qb8 24.Rc6 Rc6 25.Qc6 Qb2 26.Qe6 Kh8+–) 23...Bd8?! (23...Rd8 24.Nb6 Qb8 25.Rc2+–) 24.Qd2 (better is 24.Bg4!? g6 25.Nd6 Qb8 26.Nf5 gf5 27.Bf5 Qb7+–) 24...Bb5 25.Nb6 (better is 25.Qb4 Qa6+–) 25...Qb7? (better is 25...Qa6 26.Bb5 Qb5+–) 26.Bb5 Rc1 27.Rc1 Bb6 (27...Qb6 28.Bc4 Kh8 29.Bd5+–) 28.a4 (28.Bc6 Qa7 29.Be4 Nd6 30.Bd5 Kh8+–) 28...Rc8 (28...Qe7 29.Rc6 Bd8 30.Qc1+–) 29.Rc8 (29.Qb4 Rc1 30.Bc1 Qb8+–) 29...Qc8 30.Qc3 Qc3 31.Bc3 Nd6 32.Bb4 (32.Bb4 Nb5 33.ab5+–) 1–0. Fournier,Frederic (1990) – jrecatepec, Active (3/0), 2005.

6.Be5+= Bf5 7.Nf3 (7.Bf6 gf6 8.Nf3 Rg8+/–) 7...Ng6+= 8.Bb2 (8.Bd3 Bd3 9.cd3 Ne5 10.Ne5 Bd6+=) 8...Bd6 9.c4 0–0 10.Nc3 White launches an attack 10...c6 (10...dc4 11.Bc4 Ne5 12.Ne5 Be5 13.d4+/–) 11.bc6+= bc6 12.Nd4 Qd7 (12...Ne7 13.Nf5 Nf5 14.Bd3+/–) 13.cd5+/– cd5 (13...Nd5 14.Nd5 (worse is 14.Nf5 Qf5 15.Nd5 cd5+/–) 14...cd5 15.Bb5+– (15.Nf5?! Qf5 16.Rb1 Rfb8+/–)) 14.Bb5 Qc8 15.Rc1 Be6? (15...Bc7!?+–) 16.Nd5! Qd8 (16...Bd5 A deflection 17.Rc8) 17.Nc6 (17.Ne6?! fe6 18.Nf6 gf6+–) 17...Qe8 (17...Qc8 18.Nce7! Ne7 19.Rc8 Rfc8 20.Nf6 gf6 21.Qf3+–) 18.Nf6 (better is 18.Nce7! Be7 19.Be8 Bd5+–) 18...gf6 19.Qh5 (19.Bf6 Ba3 20.Qh5 Bc1=) 19...Be5 (19...a6 20.Ba4+–) 20.Be5 (20.d4 a6 21.Ba4 Bd6+–) 20...fe5 21.Bd3 (21.d4 ed4 22.Nd4 Rc8+–) 21...Bd7 (21...Rc8 22.Bb5 Bd5+=) 22.Bg6 (better is 22.Ne5 Rb8 23.Nd7 Qd7 24.Bf5+–) 22...fg6 23.Qe5 (better is 23.Qh4!?+–) 23...Bc6+= 24.Qe8 Be8 25.0–0 (25.d4 Rb8+=) 25...Bf7 (25...Bb5 26.Rfe1=) 26.Rc7 Rfd8 (26...Rfc8 27.Rfc1 Rc7 28.Rc7+=) 27.d4+/– Rac8 (27...Be6 28.Rb1 Rab8 29.Rd1+=) 28.Rfc1 (28.Ra7!? Ra8 29.Ra8 Ra8 30.Ra1+/–) 28...Rc7+/– 29.Rc7 Rb8 30.h3 a6 31.Rc6 Ra8 32.Kh2 Bd5+= 33.Rc3 Rb8 34.f3 Rb2 35.e4+/– Bb7 36.d5 Rb6 37.Kg3 Rd6 38.Kf4 Rd7 39.Ke5 Kf7 40.f4 Ke7 41.g4 White prepares f5 41...h6 42.f5 Kf7 43.fg6 Kg6 44.Ke6 Rd8 45.Ke7 Rc8 46.Rc8 Bc8 47.e5 Kg7 48.d6 Kg6 49.e6 (49.e6 Be6 50.Ke6+–) 1–0. Wilk,E – Sobocinska, Augustow Poland, 1994.

6.Be5 Ng6 7.Bb2 Bd6 8.Nf3 0–0 9.d4 c6 10.bc6 bc6 11.c4 dc4 (11...Bf5 12.c5 Rb8 13.Ra2+=) 12.Bc4+= Nd5 13.Nbd2 Bg4 14.Be2 Qe7 15.0–0 Rab8 16.Rb1 (16.Nc4 Ngf4 17.ef4 Rb2+/–) 16...Rfe8 (16...Bf5 17.e4 Ngf4 A) worse is 18.ef5 Ne2 (worse is 18...Qe2 19.Qe2 Ne2 20.Kh1+=) 19.Kh1 Nec3–/+; B) 18.Bc4 Be4 19.Re1=) 17.Qc1 (17.Nc4 Bc7+/–) 17...Rec8 (17...Bf5 18.Ra1= (worse is 18.Qc6 Ne3 19.fe3 Bb1+=)) 18.h3 (18.Qc2 c5 19.Nc4 cd4 20.Bd4 Rb1 21.Rb1 Ba3+=) 18...Be6 (better is 18...Bf5!? 19.e4 Be4 20.Ne4 Qe4=) 19.Nc4 Bc7 20.Nce5 (20.Qc2!?+/–) 20...Ne5+= 21.Ne5 Be5 22.de5 Qg5 23.Bd4 Bh3 24.Bf3 Be6? (better is 24...Nb6!?+=) 25.Rb8+/– Rb8 26.e4 Nf4+= 27.g3 Rf8?? 28.Qf4+– Qh5 29.Qh4 (29.Qh4 Qf3 30.Rc1+=) 1–0. Fournier,Frederic – Guest402596, Partie amicale, 1m + 0s, 2007.

6.Be5 Ng6 7.Bb2 Be7 8.Nf3 0–0 9.c4 Bg4 10.h3 Be6 11.Qc2 c6 12.Be2 cb5 13.cb5 Ne4 14.Nc3 Rc8 15.Qa4 Qb6 (15...Nc5!? 16.Qd1 Re8+=) 16.Ne4+– de4 17.Qe4 f5 18.Qd4 Qd4 19.Bd4 (19.ed4?! Nf4+=) 19...Nh4 20.Nh4 Bh4 21.Ba7 Rc2 22.Bd3 Rcc8 23.Bd4 Be7 24.0–0 f4 25.a4 f3 26.Be4 fg2 27.Bg2 Rc7 28.Rfc1 Rd7 29.b6 Bf6 30.Bf6 Rf6 31.d4 Rg6 32.Kf1 h6 33.Rc7 Rf6 34.a5 Rff7 35.Rac1 Kh7 (35...Rf5 36.a6 ba6 37.b7+–) 36.Ke1 Kg6 (36...Rc7 37.Rc7 Rc7 38.bc7+–) 37.R1c5 (37.Bb7 Kf6 38.R1c6 Kg5+–) 37...Rde7 (37...Rc7 38.bc7 Bc8 39.Bd5+–) 38.Re7 (better is 38.Bb7 Kf6+–) 38...Re7 39.Rc7 (39.Rc7 Rc7 40.bc7+–) 1–0. combijack (1790) – floyd_page, gameknot.com, 2012.

6.Be5 Ng6 7.Bd4 +=.

6.Be5+= Ng6 7.Nf3 +=.

5.Bb5 Bd6!?–/+

6.Nf3 0–0 7.Bc6 bc6 8.Ne5 Ne4 9.Nc6 Qg5 10.Rg1 (better is 10.g3+/–) 10...Bh2+= 11.Rf1 Qg2 12.d3? (better is 12.Qe2 Bh3 13.d3 Nf2 14.Rf2–/+) 12...Bg4 13.Qc1 Nf6 (better is 13...Ng3 14.Nd2 Bg1 (14...Nf1?! 15.Nf1 Bd6 16.Qd2–+) 15.Ne7 Kh8–+) 14.Bd4 Qf3 15.Qd2 Bh3 0–1. cindya (2235) – ditto (1905), net–chess.com, 2011.

6.Nf3 Bd7 7.Bc6 Bc6 8.Ne5 Be5 9.Be5 0–0 10.Bd4 Ne4 11.0–0 Qh4 12.d3 Nf6 13.Nc3 Ng4 14.h3 Nf6 15.Qf3 Nh5? (better is 15...a6+–) 16.b5 Bd7 17.Qd5 Bh3 (17...Bc8+–) 18.gh3 Qh3 19.Qb7 Rfc8 20.Qg2 (20.Ba7?! Ra7 21.Qh1 Qg4 22.Qg2 Qh4+–) 20...Qg2 21.Kg2 c6 22.bc6 Rc6 23.Rfb1 Rc7 24.Rb2 f5 25.Rab1 g6 26.Nd5 Rd7 27.c4 Kf7 28.Rb7 Rb7 29.Rb7 Ke8 (29...Kg8+–) 30.Nc7 (30.Nc7 Kd8 31.Na8+–) 1–0. Klaus Behrmann (2390) – Geordiedazza, ChessWorld.net, 2003.

6.Nf3 Nd7 7.d3 (7.0–0 a5 8.ba5 Ra5 9.c4=; 7.Nc3 Ne7 8.Be2 e4 9.Nd4=) 7...a5 8.ba5 Ra5 9.c4 =.

6.Nf3 Qe7 7.d4 (7.c4 dc4 8.Bc6 bc6 9.Qc2=; 7.Bc6 bc6 8.d4 ed4 9.Nd4=) 7...e4 8.Ne5 Bd7 9.Bc6 =.

6.Nf3 Bg4 7.c4 dc4 8.Bc6 bc6 9.h3 =.

6.Nf3 Bg4 7.Bc6 bc6 8.h3 Bf3 9.Qf3 =.

6.Nf3 Bg4 7.h3 Bf3 8.Qf3 0–0 9.0–0 (9.c4 e4 10.Qf5 Be7=) 9...e4 (9...a5 10.Bc6 bc6 11.ba5 Ra5 12.Qf5=) 10.Qe2 (10.Bf6 ef3 11.Bd8 fg2 12.Kg2 Nd8=) 10...a6 (10...Ne5 11.f4 ef3 12.gf3+=) 11.Bc6= bc6 12.d3 (12.f3 Qe7=) 12...Re8 (12...a5 13.de4 Ne4 14.Qg4=) 13.Bf6 (13.c4!?=) 13...Qf6+= 14.Nd2 Be5 (14...Qe5 15.g3+=) 15.Rab1 (15.d4 Bd6+=) 15...ed3 16.cd3 d4 (16...a5 17.Nf3=) 17.e4 (17.Ne4 Qe6+=) 17...Rab8 (17...a5 18.ba5 Ra5 19.Nc4+=) 18.Nb3 (18.Qf3 Qh6 19.Nb3 Ra8+=) 18...Bd6 (18...Qf4 19.g3 Qg5 20.Kh2+/–) 19.Qb2 (19.f4 c5 20.e5 cb4+/–) 19...Be5 (19...c5!? 20.bc5 Bc5=) 20.Nc5 Ra8 21.g3 Qd6? (21...Qf3 22.Rfe1+=) 22.Nb7 (better is 22.f4 Bf6 23.e5 Be5 24.fe5 Qe5 25.Rf4+–) 22...Qe6 (22...Qd7 23.Kg2+/–) 23.Nc5 (better is 23.Kg2+/–) 23…Qh3 +=. minn (2000) – mwojo (1745), net–chess.com, 2004.

6.Nf3 Bg4 7.h3 Bf3 8.Qf3 a6 9.Bc6 =.

5.Bb5 Bd7

6.Bc6= bc6 7.Be5 a5 8.ba5 Ng4 9.Bc3 +/–.

6.Bc6= Bc6 7.Be5 a5!? 8.ba5 (8.b5 Bb5= 9.Nc3=) 8...Ra5 9.Nf3 +=.

6.Bc6= Bc6 7.Be5 Bd6 8.Nf3+= (8.Bd6 Qd6 9.Ne2+=) 8...0–0 (8...a5 9.Bd6+= (9.Nc3 Ne4 10.Bd6 Qd6 11.Nd4+=)) 9.0–0 (9.Bd6 Qd6 10.Nc3 a5+=) 9...Qe7 (9...a5 10.Nc3+=) 10.Bd6 cd6 (10...Qd6 11.Nc3+/–) 11.Nc3 (11.Nd4 a5 12.b5 Bd7+/–) 11...Ne4 12.d3?? (better is 12.a4+/–) 12...Nc3–+ 13.Qd2 d4! 14.ed4?? (14.ed4 Ne2; 14.Nd4 Na4) 14...Bf3 (better is 14...Ne2 15.Kh1 Bf3 16.gf3 Nd4 17.Rae1–+) 15.Rfe1 (15.gf3 Ne2 16.Kg2 Nd4 17.c3–+) 15...Ne4! 16.gf3? (16.de4 Bg4; 16.Re4 Be4) 16…Nd2–+ (16...Nd2 17.Re7 Nf3 18.Kg2 Nd4–+) 0–1. saetta – loves, ICS, 1999.

6.Ne2 Bd6 7.d3 0–0 8.c4 a6 (8...dc4 9.Bc4 a6 10.0–0+=) 9.cd5?? (better is 9.Bc6 Bc6 10.c5+/–) 9...Nd5 10.Bc4 Nf6 white timed out 0–1. alaamattar (2215) – tjong (2285), net–chess.com, 2012.

6.Nf3 e4= 7.Bc6 Bc6 8.Ne5 Qd6 =.

6.Nf3 e4+= 7.Nd4 a6 8.Nc6 bc6 9.Ba4 (9.Be2 c5=) 9...Qb8 (9...a5!?+=) 10.Bf6 gf6 11.0–0 Bg7 12.Nc3 f5 13.Rb1 0–0? (better is 13...Rg8!?+=) 14.Nd5!+– Rd8? (14...cd5 15.Bd7) 15.Ne7 Kf8 16.Nc6 Bc6? (better is 16...Qb6 17.Nd8 Ba4 18.Nf7 Kf7+/–) 17.Bc6+– Ra7 18.c4 (18.d4!? Qb6 19.d5 a5+–) 18...Qc8 19.a4 (19.f3 Rd6 20.Bd5 c6 21.Be4 fe4 22.fe4 Rd3+/–) 19...Qe6 20.Bd5 Qg6 21.b5 ab5 22.ab5 (worse is 22.Rb5 c6 23.Rb6 Rd6 24.Rb8 Ke7+=) 22...Be5 (22...Ra3 23.f3 Rd7 24.fe4 fe4 25.Rf4+–) 23.Qb3 (23.f3 Qh5 24.g3 f4 25.fe4 Qd1 26.Rbd1 Rd5 27.ed5 fg3 28.hg3 Bg3+–) 23...Qf6 (better is 23...Qd6+–) 24.Bc6?? (better is 24.f3 Qh4 25.g3+–) 24...Rd2+/– 25.Bd5 (25.c5 Qh4 26.g3 Qg5+/–) 25...Qh6 (better is 25...Raa2+=) 26.Qb4?? (better is 26.h3 Raa2 27.c5+/–) 26...Ke8 (better is 26...Bd6 27.Qd6 Qd6–+ (27...cd6?! 28.b6 Raa2 29.b7–/+)) 27.h3 (better is 27.Bc6 Rd7 28.Bd7 Kd7+–) 27...Rda2?? (27...Raa2 28.Rfd1 Rd1 29.Rd1+–) 28.c5 R2a5 29.c6 Qd6 30.Qd6 Bd6 31.f3 Bc5 32.fe4 Be3 33.Kh1 f4 34.g3 Ra4 35.gf4+– Re4?? (35...Ra3+–) 1–0. ahmed sharkawy_1 – boldeagle, ChessWorld.net, 2005.

6.Nf3 e4= 7.Ng5 Ng4 (7...h6 8.Nh3–/+) 8.f3 (8.Nh3 Nce5 9.Bd7 Qd7=) 8...ef3 (better is 8...Qg5 9.fg4 Bg4–/+) 9.Qf3?? (better is 9.Nf3 a5 10.ba5 Ra5 11.a4=) 9...Qg5–+ 10.Rf1 (10.0–0 0–0–0 11.Qf7–+) 10...f6 11.Qf4 Qf4 12.Rf4 (12.ef4 Nh2 13.Rh1 Ng4–+) 12...Nh2 13.Nc3 Bd6 14.Rf2 (14.Nd5 Bf4 15.Nf4 Ng4–+) 14...Bg3 15.Bc6 Bc6 (better is 15...bc6 16.Ne2 Bf2 17.Kf2 Ng4 18.Kf1–+) 16.d4 (16.Ke2 Bd7–+) 16...Bf2 (better is 16...Ng4 17.Nd1–+) 17.Kf2 Ng4 (better is 17...f5 18.b5 Bd7 19.Nd5–+) 18.Ke2 (18.Kf3 f5 19.b5 Bd7 20.Nd5 Kd8–+) 18...0–0 (18...0–0–0 19.Kd2–+) 19.Kd3 (19.Kf3 f5 20.b5 Bd7 21.Nd5 c6–+) 19...Rae8 20.Re1 (20.b5 Bd7 21.Re1 Bf5 22.Kd2 Be4–+) 20...f5 21.g3 Nf6 22.Ne2 f4 23.gf4 Ng4 24.Ng3 Rf7 25.c4 Rfe7 26.Nf5 dc4 27.Kc4 Bd7 28.Ne7 Re7 29.e4 c6 30.e5 b5 31.Kc5 Nf2 32.Rf1 Nd3 33.Kd6–+ Rf7 34.Ba1 Nf4 35.Rf4 Rf4 Theme: Deflection from d7 36.Kd7 h5 37.e6 Re4 38.Kc6 a6 39.Kd7?? h4–+ 40.e7 Kf7 41.d5 h3 42.d6 h2 43.Bg7 h1Q 44.Bf8 Qh3 45.Kc7 Rc4 46.Kd8 Qc8 0–1. Cleopatre – therocketman, internet, 2007.

5.c4 d4

6.Qc2 de3 7.de3 a6 8.Nd2 Qd6 9.Ngf3 Nd7 10.b5 ab5 11.cb5 Nd8 12.Ne4 Qg6 13.Qc4 f6 14.Nh4 Qh5 15.Be2 Qh6 16.Nf5 Nb6? (16...Qg6 17.Neg3 Nb6 18.Qc7 Nd5 19.Nd6 Bd6 20.Qd6 Qc2 21.Be5 Nf7 22.Qd5 fe5+–) 17.Qc7?? (better is 17.Nh6 Nc4 18.Bc4+–) 17...Nd5?? (better is 17...Bf5 18.Ng3 Nd5 19.Nf5 Nc7 20.Nh6 gh6–/+) 18.Ned6 (18.Nh6?! Nc7 19.Rc1 Nd5+/–) 18...Bd6 19.Nd6 (19.Qd6?! Bf5 20.Qd5 Qg6+/–) 19...Kf8 20.Qd8 1–0. combijack (1790) – ciano999 (1670), gameknot.com, 2012.

6.c5 Be7 7.Bb5 0–0 8.Qf3 (8.Bc6!? bc6 9.Nf3=) 8...Bg4 9.Qg3 de3 10.Qe3? (10.fe3 e4=) 10...e4 (10...Nd4 11.Ba4 Nd5 12.Qg3–+ (12.Qe5?? Bf6 13.Bd4 Be5 14.Be5 Nb4 15.ab4 Qd5–+)) 11.h3 Nd5 (better is 11...Bd7!? 12.Nc3 a5 13.Ne4 Ne4 14.Qe4 Re8–/+) 12.Qe4+= Be6 13.Bd3 Bh4?? (better is 13...g6 14.Qf3 Bf6 15.Bf6 Nf6+=) 14.Qh7 1–0. Eries – interloper, ChessWorld.net, 2011.

6.c5 Bf5 7.Bb5 A) 7...Bg4 A1) 8.Qb3 Be6 (8...Qe7 9.Bc6 bc6 10.Qd3 Qe6 11.ed4 Rd8 12.Qe3 ed4 13.Qe6 fe6=) 9.Bc6 bc6 10.Qa4 a5 11.ed4 ab4 12.Qc6 Bd7 13.Qf3 e4=; A2) 8.Qc2 Qd7 (8...a5 9.Bc6 bc6 10.ed4 ed4 11.Qd3 Qe7 12.Kf1 Bc8 13.Ne2 Ba6+=) 9.ed4 ed4 10.Ne2 Be2 11.Be2 0–0–0 12.d3 Re8 13.0–0 Qf5=; A3) 8.Bc6 bc6 9.f3 Be6 10.ed4 ed4 11.Ne2 d3 12.Nd4 Qd7 13.0–0 Be7+=; B) 7...a5 B1) 8.Nf3 ab4 (8...Bg4 9.h3 Bd7 10.Bc6 Bc6 11.Ne5 Bg2 12.Rh2 Bd5 13.Bd4 ab4+=) 9.ed4 ba3 10.Ra3 Ra3 11.Na3 e4 12.Ne5 Be7 13.Bc6 bc6+=; B2) 8.ed4 ed4 9.Nf3 ab4 10.Qe2 Qe7 11.Nd4 Bb1 12.Nc6 Qe2 13.Ke2 Be4+/– 1.34; C) 7...Qd5 8.Nf3 0–0–0 (8...Bg4 9.ed4 Qe4 10.Qe2 Qe2 11.Be2 Bf3 12.de5 Bg2 13.Rg1 Nd7+/–) 9.Qa4 Kb8 10.0–0 Bg4 11.Bc6 bc6 12.Nh4 Be7 13.ed4 ed4=; D) 7...de3 8.Bc6 bc6 9.fe3 a5 10.Be5 Nd7 11.Bc3 ab4 12.Bb4 Bc5 13.Bc3 Qh4+=.

6.c5 Bf5 7.d3 Be7 (7...de3 8.fe3 Ng4 (8...e4 9.b5 Nb8 10.d4 Ng4 11.Qe2 Qg5 12.Bc1 Qf6 13.Qc2 Qh6=) 9.Qe2 Qf6 10.Nf3 0–0–0 11.Qd2 Be4 12.Be2 Qh6 13.Nc3 Bg6+=; 7...Qe7 8.Qa4 (8.b5 Nd8 9.Qe2 Ne6 10.Qf3 Qc5 11.Qf5 Qc2 12.Nd2 Qb2 13.Rb1 Qa3–+; 8.Nf3 de3 9.fe3 e4 10.Nd4 Nd4 11.Bd4 0–0–0 12.c6 Rd4 13.cb7 Kb8–/+) 8...Nd7 (8...de3 9.fe3 e4 10.d4 Nd5 11.Nc3 Nc3 12.Bc3 Qh4 13.g3 Qg5=) 9.Nd2 de3 10.fe3 Qh4 11.g3 Qh6 12.Nc4 Be6 13.Bc1 Qg6+=; 7...Be6 A) 8.Qa4 Nd7 (8...de3 9.fe3 Ng4 10.Nf3 Ne3 11.Ne5 Bd5 12.Ke2 Nf1 13.Rf1 Qe7–/+) 9.Nf3 Bd5 10.Nbd2 a5 11.Qb5 Ra6 12.e4 Na7 13.Qa6 ba6–/+; B) 8.Nf3 a6 (8...de3 9.fe3 Nd5 10.Qd2 f6 11.b5 Nce7 12.e4 Nf4 13.d4 Ng8+=) 9.Be2 Be7 10.ed4 ed4 11.0–0 0–0 12.Ng5 Bd5 13.Re1 Re8+=; 7...a5 8.ed4 (8.b5 Na7 9.Qf3 Be6 10.Qg3 Nb5 11.a4 Na7 12.Qe5 Nc6 13.Qg5 h6–+) 8...ed4 (8...Nd4 9.Nf3 Qd5 10.Nd4 ed4 11.Nd2 Bg4 12.f3 Be6 13.f4 Bg4+=) 9.Nf3 ab4 10.ab4 Ra1 11.Ba1 Qe7 12.Kd2 Nb4 13.Bd4 Na6–/+) 8.Qa4? (better is 8.b5!? Nb8 9.Qc1+= 0–0 10.ed4 ed4 11.Nf3 Re8 12.Be2 a6 13.Qc4 ab5–/+; 8.Nf3 de3 (8...a6 9.ed4 ed4 10.Be2 0–0 11.0–0 Qd7 12.Nbd2 Nh5 13.Nb3 Bf6=) 9.fe3 e4 10.b5 Nb8 11.c6 bc6 12.Nd4 Bg4 13.Qa4 ed3–/+) 8...de3–+ 9.fe3 0–0 10.b5 Bc5 (better is 10...Nb8 11.Be5 Bd3+=) 11.bc6+/– bc6 12.Bc1 (12.e4 Ne4 13.de4 Qh4 14.Kd1 Rad8 15.Nd2 Bg1+=) 12...e4 (better is 12...Ng4=) 13.d4+/– Bd4?? (better is 13...Bd6+/–) 14.ed4 Nd5 15.Qc6 Qh4 16.g3 Qg4 17.Qd5 Rad8 18.Qc5 e3 19.Be3 Rfe8 20.Qc3 Qd1 21.Kd1 Bg4 22.Kc1 Be6 23.Qc7 a6 24.Ba6 Bg4 25.Qf4 f5 26.h3 Re4 27.Qf2 Re3 28.Qe3 Kf7 29.hg4 Re8 30.Qb3 Kf8 31.Rh7 Re1 32.Kb2 fg4 33.Rh8 Ke7 34.Qb4 Kf7 35.Qe1 Kg6 36.Qe6 Kg5 37.Qe5 Kg6 38.Bd3 Kf7 39.Qe8 Kf6 40.Nd2 Kg5 41.Ne4 Kf5 42.Rf1 1–0. Eries – interloper, ChessWorld.net, 2011.

6.ed4 ed4 7.Nf3 (7.Qe2 Be7 8.Qd3+=) 7...Bd6 (7...d3 8.Ne5 Ne5 9.Be5 Ng4 10.Qa4 Bd7–+) 8.Qe2+= (8.Bd4? Nd4 9.Nd4 Be5–+) 8...Be6 9.Ng5 (9.b5 d3 10.Qd3 Na5+=) 9...0–0 10.Ne6 fe6 11.Qe6 (11.Ra2 a6 12.Qe6 Rf7=) 11...Kh8 12.Qh3?? (better is 12.Kd1=) 12...Qe7–+ 13.Kd1?? (13.Be2 Rae8 14.Qd3–+) 13...Ne4 14.Kc1 Nf2 15.Qh5 White intends c5 15...Nh1 16.Bd3 Rf1! 17.Bf1 Nf2 18.c5?? Be5 19.d3 Bf4 20.Kc2 Qe1?? 21.Be2 g6 22.Qd5?? Qb4 23.Qc6?? bc6?? 24.ab4+– Re8 25.Bd4 Kg8 26.Bf3 Re6 27.Bf2 Kf7 28.Ra7 Re8 29.Nc3 Re7 30.Ne4 Ke6 31.g3 Bh6 32.Bg4 Kd5 33.Nf6 Ke5 34.Ng8 Rg7 35.Nh6 1–0. thedesertfox (1905) – bar (1935), net–chess.com, 2004. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6)

6.Nf3 Be7 7.Bd3?? (better is 7.b5!? Nb8 8.Ne5 de3 9.fe3+=) 7...0–0 (7...e4 8.Be4 Ne4 9.d3–+) 8.0–0? (8.Qc2 Bg4+=) 8...Bg4 (better is 8...de3!? 9.Qc2 ef2 10.Kh1 Bb4 11.Ne5 Nd4 12.Bd4 Qd4–+) 9.h3= Bd7 (better is 9...Bh5 10.g4 e4 11.gh5 de3=) 10.ed4?? (10.b5 e4 11.Be4 Ne4 12.bc6 de3 13.cd7 ef2 14.Rf2 Nf2 15.Kf2 Qd7=) 10...ed4?? (better is 10...e4 11.Bc2 ef3 12.Qf3 Re8–/+) 11.b5 (11.Nd4? Nd4 12.Bd4 Be6 13.Bh7 Nh7–+) 11...Na5 12.Nd4 c5 13.bc6 bc6 14.Re1 c5 15.Nf5 Nc6?? 16.Ne7+– Ne7 17.Bf6 gf6 18.Nc3 a6 19.Qh5 f5 20.Re7 Qe7+/– 21.Nd5 Qd6 22.Qg5 Kh8= 23.Rb1 Rae8 24.Rb6 Re1 25.Bf1 Qe5 26.Ra6 Qe2 27.Ne3 Qd2?? 28.Qf6+– Kg8 29.Qg5 Kh8 30.Qe7 Re8 31.Qc5 f4= 32.Ra8?? Ra8–+ 33.Qe5 Kg8 34.Qg5 Kf8 35.Qc5 Kg8 36.Qg5= Kf8 37.Qc5 Kg8 38.Qg5= ½–½. mgriffin – tdutcher, net–chess.com, 2001. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6 5.c4 d4)

6.Nf3 Bg4 +=.

5.Nf3 Bd6

6.b5 e4 7.bc6 ef3 8.Qf3 bc6 9.Bf6 Qf6 (worse is 9...gf6 10.c4+/–) 10.Qf6 gf6 +=.

6.Bb5 Bd7 (6...Qe7 7.d4 e4 8.Ne5=) 7.Nc3 (better is 7.Bc6 Bc6 8.Ne5+/–) 7...0–0 8.0–0 a6 (8...a5 9.Bc6 Bc6 10.b5+=) 9.Ba4 b5 10.Bb3 Be6 11.Ne2 (11.d3 Ne7=) 11...e4 (11...Bg4+=) 12.Ng5 (12.Nfd4 Nd4 13.Nd4 Bd7=) 12...Ng4 (better is 12...Bh2 13.Kh2 Ng4 14.Kg1 Qg5–+) 13.Ne6?? (better is 13.f4 ef3 14.Nf3=) 13...Bh2–+ (13...fe6?! 14.Nf4 Qh4 15.h3 Bf4 16.ef4+=) 14.Kh1 fe6 Threatening mate... how? 15.Nf4 (15.Ng1 Qh4 16.Nh3 Rf2 17.Rf2 Nf2 18.Nf2 Be5 19.Kg1 Bb2–+) 15...Qh4 (better is 15...Rf4 16.ef4 Qh4 17.Qg4 Qg4 18.Kh2 Qf4 19.Kg1 Qd2–+) 16.f3 (16.Nh3 Rf2! 17.Rf2 Nf2 18.Nf2 Be5 19.Kg1 Bb2 20.Ra2–+) 16...Bf4 17.Kg1 Bh2 (17...Qh2) 18.Kh1 Be5 0–1. esso78 – PiedPiper, ChessWorld.net, 2004.

6.c4 Bf5 (better is 6...e4!? 7.Nd4 Nd4 8.Bd4 dc4 9.Bc4 a5+=) 7.b5 (7.c5 Be7 8.Ne5 Ne5 9.Be5 0–0+=) 7...e4 (better is 7...Ne7 8.Be5 Be5 9.Ne5 d4+=) 8.Nd4 (better is 8.bc6 ef3 9.cb7+/–) 8...Nd4+= 9.Bd4 0–0 (9...dc4 10.Bc4 0–0 11.Nc3=) 10.c5 (10.Nc3 c6+=) 10...Be7 11.Nc3 (11.Be2 Nd7 12.Qc2 c6+=) 11...h6 (11...c6 12.Rb1+=) 12.Be2 (12.d3 c6=) 12...Qd7 (12...Nd7 13.Bg4 Be6 14.c6 bc6 15.Be6 fe6 16.bc6+=) 13.Qb3 (13.0–0 Qe6=) 13...Rab8 (13...c6 14.0–0=) 14.a4 (better is 14.0–0=) 14...Ng4? (14...Rbd8 15.0–0=) 15.h3 (better is 15.Qd5 Nf6 16.Qd7 Nd7 17.c6 bc6 18.bc6+–) 15...Nf6= 16.g4 (16.0–0 c6=) 16...Bg6 (16...Be6 17.d3=) 17.g5 (17.h4!? c6 18.g5 hg5 19.h5=) 17...hg5+= 18.Bf6 (better is 18.h4!? gh4 19.Rh4+=) 18...Bf6–/+ (18...gf6?! 19.Nd5 Rfd8 20.Ne7 Qe7 21.Qc3+=) 19.Qd5?? (better is 19.Rd1 d4 20.Nd5–/+) 19...Qd5–+ 20.Nd5 Ba1 21.0–0 Be5 22.Ne7 Kh8 23.Nd5 Rbc8 24.Ne7 Rcd8 25.Ng6 fg6 26.Rd1 Rd7 27.d4 Bf6 28.a5 Kg8 29.Bg4 Re7 30.d5 Re5 31.Be6 Kh8 32.Kg2 Rd8 33.Rg1 b6 34.ab6 (34.cb6 cb6 35.a6 Be7–+) 0–1. michas – mcac, internet, 2007. (=1.a3 e5 2.b4 d5 3.Bb2 Nc6 4.e3 Nf6)

6.d4 0–0?? (6...e4 7.Ne5=) 7.Be2?? (better is 7.de5 Ne5 8.Be5 Be5 9.Ne5+–) 7...ed4 8.Bd4 Nd4 9.Qd4 Qe7 10.0–0 Ne4 (10...a5 11.b5+=) 11.Nc3 (11.Qd5 Rd8 12.Qc4=) 11...Qe6 (better is 11...Nc3!? 12.Qc3 Bf5+=) 12.Nd5+/– Bh2?? (better is 12...c5 13.Qd3 Bd7+/–) 13.Kh2 Qh6 (13...Qd6 14.Kg1 Re8 15.Bd3+–) 14.Kg1 Bf5 (14...Nd6 15.Nc7 Nf5+–) 15.Ne7 Kh8 16.Nf5 Qg6 17.Ne7 (better is 17.Qe4 Rfe8 18.Qf4 Qf6+–) 17...Qg4 18.Rad1 Qh5 (18...Qe6 19.Bd3 Nf6 20.Nf5+–) 19.Bd3 (better is 19.Qe4!? c6+–) 19...Ng3 (19...Nf6+–) 20.fg3 Rad8 21.Qe4 f5 22.Nf5 Rf5 23.Qf5 Qf5 24.Bf5 Rd1 25.Rd1 Kg8 26.Rd8 Kf7+– 27.Rd7 Kf6 28.Rc7 Kf5 29.Rg7 Ke4 30.Rh7 Ke3 31.Rb7 a5 32.Ra7 Ke2 33.Ra5 Kd1+– 34.c4 Kc1 35.c5 Kb2 36.c6 Kb3 37.c7 Ka2 38.c8Q Kb2 39.Re5 1–0. pieeater – interloper, ChessWorld.net, 2011.

6.Be2 Kf8 (6...0–0!?+=) 7.0–0 Bh3?? (7...a6 8.d3+=) 8.Ng5?? (better is 8.gh3 a6+–) 8...e4?? (better is 8...Bf5=) 9.Nh3+– (9.gh3?! h6 10.Ne4 de4+/–) 9...Qe7 (9...Kg8 10.f4+–) 10.d3 (10.f3 Be5 11.Nc3 Kg8+–) 10...ed3 (10...Kg8 11.Nd2 Rd8 12.Kh1+–) 11.Qd3 Rd8 12.Nc3 Be5 13.b5 Bc3 14.Bc3 Ne5 15.Be5 Qe5 16.a4 Ne4 17.c4 Nc5 18.Qd4 Qd6 19.Ra3 Kg8 20.Ng5 Ne4 21.Ne4 Qa3 22.cd5 f6 23.Bc4 Qa4 24.Nc5 Rd6 25.Nb7 Rb6 26.Nc5 Qb4 27.d6 Qc4 28.dc7 Qd4+– 29.c8Q Kf7 30.Qh8 Qc5 31.Qh7 Qg5 32.Rc1 Qe5 33.Rc7?? Ke6 34.Qg8 Kf5 35.Qc8 Ke4 36.Qg4 Kd3 37.Qc4 Kd2 38.Qc2 Ke1 39.Qc1 Ke2 40.Rc2 Kd3 41.Qd2 Ke4+– 42.Rc3 Qc3 43.Qd1 Rb5–+ 44.f3 Kf5 45.e4?? Kg5 46.h4 Kh4 47.g3 Kg3 48.Qd6 Kf3 49.Qd1 Ke4 50.Qg4 Ke5 51.Qe2 Kd6 52.Qb5 Qc5 53.Qc5 Kc5 54.Kf1 g5 55.Kg1 f5 56.Kg2 a5 0–1. pieeater – interloper, ChessWorld.net, 2010.

5.Nf3 e4=

6.Nd4 Nd4 7.Bd4 Be7 8.c4 0–0 9.cd5 Nd5 10.Nc3 Nc3 11.Bc3 (11.dc3 a5=) 11...b6 (11...Bf5 12.Qh5 Qd7 13.Be2+=) 12.Be2 Bb7 13.0–0 Bf6 (13...Bd6 14.f3=) 14.Bf6+= Qf6 15.f3 a5 16.b5 Rad8 17.fe4 Qh4 (17...Qe5!?=) 18.Rf4+/– Qg5 19.d4 (19.Qc2 Qg6+/–) 19...Rde8 (19...f5 20.Rc1+=) 20.Bf3 (better is 20.Qc2!?+/–) 20...Qb5+= 21.e5 Bf3 22.Qf3 Qb2 (22...Qb3!?=) 23.Qf2?? (better is 23.Rf1 Re7 24.a4+=) 23…Qa1–+ (23...Qa1 24.Qf1 Qa3–+) 0–1. Fournier,Frederic (1820) – JACAROL, Active, 2007.

6.Nd4 Bd6 7.Be2 (7.Nc6 bc6 8.Nc3 0–0 9.Be2 Qe7 10.0–0 Bd7 11.Na4 a5 12.Nc5 ab4) 7...Bd7 (7...0–0 8.Nc6 bc6 9.Nc3 Qe7 10.0–0 Bd7 11.Rb1 Rfb8 12.Ba1 h6) 8.Nc6 bc6 9.Nc3 a5 10.b5 0–0 11.0–0 Qe7 12.a4 Rfb8.

6.Nd4 Bd7 7.Bb5 Nd4 (7...a5 8.Nc3 ab4 9.ab4 Bb4 10.Ra8 Qa8 11.0–0 Nd4 12.Bd7 Kd7) 8.Bd7 Qd7 9.ed4 (9.Bd4!? Be7 10.Nc3+= 0–0 11.0–0 a5 12.b5 Qe6) 9...Bd6–/+ 10.0–0 (10.Nc3 0–0 11.0–0 a5 12.b5 c5) 10...c6 (10...0–0 11.d3–/+ (11.Nc3 Rfe8 12.Qe2 c6) 11...a5 12.ba5 Ra5) 11.Re1 (11.d3 Qc7 (11...0–0 12.de4 de4) 12.h3 (12.Nc3 0–0) 12...0–0+=; 11.f3 0–0 12.fe4 Ne4) 11...Bc7 (11...Qf5 12.f3–/+ (12.Qe2 0–0) 12...0–0; 11...0–0 12.Nc3 a5) 12.Nc3 Bb6 (12...Qd6 13.g3 0–0 14.d3+=; 12...0–0–/+) 13.Ne2 (better is 13.d3!?+/–) 13...Qd6 14.c3 Ng4 (14...Bc7 15.Ng3 0–0+=) 15.g3 (15.Ng3 h5 16.h3 Nf2=) 15...Qf6 (better is 15...Qh6!? 16.h4 g5–/+) 16.Nf4= Qg5 (better is 16...Qf5!?=) 17.d3 Bc7 (17...Nf6 18.f3+/–) 18.Bc1 (18.h4!? Qf5 19.f3+/–) 18...Bf4= 19.Bf4 Qf5 (19...Qh5!? 20.h4 Qg6+/–) 20.de4 de4 21.c4 (21.f3 Nf6 22.fe4 Qg6+/– (22...Ne4?? 23.Qf3+–)) 21...Qh5? (21...0–0–0!?=) 22.h4 (22.Re4!? Kd7 23.h4+–) 22...f5 23.d5 Rd8 24.d6 Rd7 25.c5 0–0 26.Qd4 b6?? 27.cb6+– ab6 28.Qb6 Rc8 29.Rac1 Qg6 30.a4 Nf6 31.a5 Nd5+/– 32.Be3?? Qd6 33.Qd4 Nb4?? 34.Qd6+– Rd6 35.Rc3?? Ra8 36.Bc5 Nd5 37.Bd6 Nc3–/+ 38.Kg2 Ra5?? 39.Kh3?? Nb5 40.Bf4 c5 41.Rd1 g6 42.Rd8 Kf7 43.Rd7 Ke6 44.Rh7 Ra2 45.Be3 c4 46.Rg7 Kf6 47.Rb7 c3?? 48.Rb5+/– c2 49.Rb6 Ke5 50.Rg6+– Ra1 51.h5 Kd5 52.Rg5 c1Q? 53.Rf5?? Ke6+/– 54.Kg4?? Qd1–+ 55.Kf4 Qf3 56.Kg5 Qf5 57.Kh4 Rh1 0–1. pieeater – allknight, ChessWorld.net, 2010.

6.Nd4 Bd7 7.c4 dc4 (7...a5 8.b5 Ne5 9.cd5 Nd5 10.Qc2 Qh4 11.Be2 f5 12.Nf5 Nd3) 8.Nc6 Bc6 9.Bc4 Bd6 10.Bd4 b5 11.Be2 Qd7 12.0–0 0–0.

6.Nd4 Bd7 7.Nc6 bc6 8.Nc3 a5 9.b5 Bd6 10.Be2 0–0 11.0–0 Qe8 12.a4 Qe5.

6.Nd4 Bd7 7.Be2 Nd4 (7...Bd6 8.Nc6 bc6 9.Nc3 a5 10.b5 0–0 11.0–0 Qe7 12.a4 Rfb8) 8.Bd4 a5= 9.Nc3 Bd6 10.Qb1 ab4 11.ab4 Ra1 12.Qa1 0–0.

6.Nd4 Be7 7.Be2 Qd6 (7...0–0 8.0–0 Qd6 9.Nc6 bc6 10.Nc3 a5 11.b5 h6 12.bc6 Qc6) 8.0–0 0–0 9.Nc6 bc6 10.Nc3 a5 11.b5 h6 12.Rb1 c5.

6.Ne5 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.Nc3 a5 10.Be2 Bd7 11.ba5 Ra5 12.Qb1 b6.

5.h3 Bd6

6.c4 d4 7.c5+= Be7 8.Nf3 Bf5 (better is 8...de3 9.de3 Qd1 10.Kd1 e4=) 9.Nh4?? (9.b5 Na5 10.Qa4 b6 11.Ne5 de3 12.de3 Qd5 13.cb6 ab6=) 9...Qd7 (better is 9...Be6!? 10.Nf3 0–0–/+) 10.Nf5+= Qf5 11.Qb3?? (11.Bb5 0–0+=) 11...0–0 (better is 11...Ne4 12.Bd3 Qf2 13.Kd1 Qg2 14.Be4 Qe4–+) 12.Be2+= Rfd8 13.ed4 (13.0–0!?+=) 13...Nd4–/+ 14.Bd4 Rd4 15.0–0 Nd5 16.Nc3 Nf4 17.Bf3? (better is 17.Bg4 Qg6 18.Ne2 Ne2 19.Be2 Rd2 20.Qe3–/+) 17...Nh3! 18.gh3 (18.Kh1 Rh4 19.Nd5–+) 18...Qf3 19.Rae1 Qh3 20.Re3 Rg4 21.Rg3 Rg3 22.fg3 Qg3 23.Kh1 Qh3 24.Kg1 Rf8 25.Qd1 Rd8 26.Qf3 Qh4 27.Qf7 Kh8 28.Nd5 Qg4 29.Kf2 Rf8 30.Qf8 Bf8 31.Ke1 Qh4 32.Kd1 Qg4 33.Ke1 Kg8 34.Rf6 Qh4 (34...Qh4 35.Rf2 Qh1 36.Ke2 Qd5–+) 0–1. Darkseid – pieeater, ChessWorld.net, 2012.

6.Nf3 e4 7.Nd4 +=.

6.Nf3 Bf5

7.b5 Ne7 8.Be5 Be5 9.Ne5 0–0 +=.

7.Bb5 a6 8.Be2 (better is 8.Bc6!? bc6 9.Ne5 Be5 10.Be5+=) 8...Qd7 (8...Qe7 9.d4–/+) 9.d4 0–0–0?? (better is 9...ed4 10.Nd4 Be5–/+) 10.de5+– Ne5 11.Be5 Be5 12.Ne5 Qe7 13.f4 (better is 13.Nf3 Ne4+–) 13...Ne4 14.g4?? (14.0–0 f6 15.Bg4 g6+–) 14...Ng3 (14...Qh4 15.Kf1 Qf2#) 15.Rg1+– (15.gf5?! Nh1 16.Qd4 Kb8+/–) 15...Qh4 16.gf5 Ne4 17.Kf1 Qh3 18.Rg2= Qe3?? 19.Nf7+– Ng3 20.Ke1 d4 21.Nh8 h6 22.Nf7 Re8 23.Ne5 Qf4 24.Qd3 Qe5 25.Nd2 h5 26.Rg3 h4 27.Rg2 Kb8 28.Rg7! Qh2 29.Nf1 Qh1 30.Qd4 h3 31.Kd2 h2 32.Rh7 Qg2 33.Rh2 Qg5 34.Ne3 Rd8 35.Rh8 Rh8 36.Qh8 Ka7 37.Qd4 b6 38.a4 Kb7 39.Qc4 Qf6 40.Qa6 Kb8 41.Rg1 Qd6 42.Bd3 c6 43.Qb6 Kc8 44.Rg8 Qd8 45.Rd8# 1–0. 488 – pieeater, ChessWorld.net, 2012.

7.Bb5 Bd7 8.Bc6+= Bc6 9.Ne5 0–0 (9...Ba4 10.Nc3 Be5 11.Na4 Bb2 12.Nb2+/–) 10.Nc6+/– bc6 11.0–0 Qe7 12.Nc3 (12.Qf3 Nd7+/–) 12...a5+= 13.ba5 Ra5 14.Qe2 (14.Ne2 Rb8 (worse is 14...Ba3 15.Nd4+–) 15.Nd4 Ra6+=) 14...Qe5 (14...Ba3 15.Nb1 Bb4 16.Ra5 Ba5 17.Qa6=) 15.f4+= Qh5 (15...Qe7!?+=) 16.Qh5+/– Nh5 17.Ne2 Re8 (17...Rb8 18.Ra2+/–) 18.g4 Nf6 19.Bf6 gf6 20.Ra2 (20.Nd4 c5 21.Nf5 c4+–) 20...Kg7 (20...Ra3!? 21.Ra3 Ba3+/–) 21.Nd4 c5 (21...c5 22.Nf5 Kg6 23.Nh4 Kg7+–). thedesertfox (1920) – shelob, net–chess.com, 2004. (=1.a3 e5 2.b4 d5 3.e3 Nf6 4.Bb2 Nc6)

7.Bb5 Nd7!? =.

7.Bb5 Qe7 8.d4 ed4 9.Nd4 Bd7 +=.

4.a3 Be6

5.Bb5 a5 A) 6.Nf3 Bd7 (6...ab4 7.ab4 Ra1 8.Ba1 Bd7 9.Bf6 ef6 10.c3 Ne5 11.Bd7 Qd7+=) 7.ba5 Na5 8.Bd7 Nd7 9.d3 Nc6 10.0–0 e5 11.Nbd2 Bd6=; B) 6.ba5 Bd7 (6...Ra5 7.Bc6 bc6 8.Nf3 Bg4 9.h3 Bh5 10.g4 Bg6 11.Ne5 Qd6=) 7.Nf3 Na5 8.Bd7 Nd7 9.d3 Nc6 10.0–0 e5 11.Nbd2 Bd6=; C) 6.Bc6 bc6 7.Ne2 ab4 8.ab4 Ra1 9.Ba1 Bd7 10.Nf4 Bf5 11.Bf6 ef6=.

5.Bb5 Qd6 A) 6.Nc3 a6 (6...Bd7 7.Be2 a6 8.Na4 Bf5 9.Nc5 0–0–0 10.Nf3 e5 11.d4 ed4=) 7.Be2 Bf5 8.Nf3 e5 9.0–0 d4 10.Na4 0–0–0 11.b5 ab5=; B) 6.Ne2 Bg4 (6...Bd7 7.c4 e5 8.c5 Qe6 9.d4 e4 10.0–0 a6 11.Nf4 Qf5=) 7.f3 Bd7 8.0–0 a5 9.Ba4 Ne5 10.Be5 Qe5 11.Bd7 Nd7=; C) 6.Nf3 Bg4 (6...0–0–0 7.Be2 Bf5 8.b5 Na5 9.0–0 e6 10.Ne5 Bg6 11.Bd4 Kb8+=) 7.h3 Bd7 8.0–0 a6 9.Bc6 Qc6 10.d3 a5 11.Nbd2 b5+=.

5.Bb5 Bd7 A) 6.Nf3 a5 (6...e6 7.Be2 Bd6 8.b5 Nb8 9.Be5 Be5 10.Ne5 a6 11.ba6 Na6=) 7.ba5 Na5 8.Bd7 Nd7 9.d3 Nc6 10.Nc3 e6 11.0–0 Bc5=; B) 6.Bc6 Bc6 (6...bc6 7.Nf3 e6 8.Bd4 a5 9.c3 Bd6 10.0–0 0–0 11.Ne5 Qe7=) 7.Nf3 a5 8.Nc3 Qd6 9.Ne2 e6 10.Bf6 gf6 11.c3 e5=; C) 6.Be2 a5 (6...e6 7.Nf3 Bd6 8.b5 Na5 9.Ne5 c6 10.a4 a6 11.0–0 0–0=) 7.b5 Na7 8.a4 c6 9.bc6 Nc6 10.Nf3 e6 11.Nc3 Rc8=.

5.Bb5 Bg4 A) 6.Bc6 bc6 7.f3 Bd7 8.Ne2 e6 9.0–0 c5 10.Bc3 cb4 11.ab4 Bd6=; B) 6.Ne2 a5 (6...Qd6 7.f3 Bd7 8.0–0 a5 9.Ba4 Ne5 10.Be5 Qe5 11.Bd7 Nd7=) 7.ba5 Bd7 8.a6 ba6 9.Bc6 Bc6 10.Bf6 ef6 11.Nd4 Bd7=; C) 6.Nf3 a5 (6...Qd6 7.h3 Bd7 8.0–0 a6 9.Bc6 Bc6 10.Be5 Qd7 11.Nd4 e6+=) 7.Ba4 e6 8.h3 Bf3 9.Qf3 ab4 10.ab4 Bb4 11.Bf6 gf6=.

5.Be2 Qd6 A) 6.d3 a6 (6...Bf5 7.Nf3 a6 8.Nbd2 Rd8 9.c4 dc4 10.Nc4 Qd7 11.Nfe5 Ne5+=) 7.Nd2 Bf5 8.c4 d4 9.ed4 Nd4 10.Ne4 Ne4 11.de4 Be4=; B) 6.Nf3 Bg4 (6...Bf5 7.b5 Na5 8.Bc3 Nc4 9.d3 Nb6 10.Be5 Qd7 11.Nd4 Bg6+=) 7.b5 Bf3 8.Bf3 Nd8 9.0–0 e5 10.Nc3 Ne6 11.Rb1 0–0–0=; C) 6.Nc3 Bf5 (6...a6 7.Nf3 Bf5 8.b5 ab5 9.Nb5 Qd7 10.Ne5 Ne5 11.Be5 Rc8+=) 7.Nb5 Qd7 8.Nf3 a6 9.Nbd4 Nd4 10.Bd4 g6 11.Ne5 Qa4+=.

5.Be2 Qd7 A) 6.d3 a5 (6...0–0–0 7.Nf3 Bg4 8.0–0 e6 9.Nbd2 h6 10.b5 Na5 11.Ne5 Be2+/–) 7.b5 Na7 8.a4 c6 9.bc6 Nc6 10.Nf3 Rc8 11.Nbd2 Bg4=; B) 6.Nc3 d4 (6...0–0–0 7.Nf3 d4 8.ed4 Nd4 9.Nd4 Qd4 10.d3 Bd7 11.Bf3 e5=) 7.ed4 Nd4 8.Nf3 0–0–0 9.Nd4 Qd4 10.d3 Bd7 11.Bf3 e5=; C) 6.Nf3 a6 (6...Bg4 7.0–0 e6 8.b5 Ne7 9.Ne5 Be2 10.Nd7 Bd1 11.Nf6 gf6+=) 7.0–0 Bg4 8.d3 0–0–0 9.Nbd2 Qf5 10.d4 Qg6 11.b5 ab5+=.

5.Be2 Bd7 A) 6.f4 e6 (6...Bf5 7.Nf3 Qd6 8.Bb5 Bd7 9.0–0 a6 10.Be2 Bf5 11.Be5 Qd8+=) 7.Nf3 Bd6 8.0–0 0–0 9.Nc3 a6 10.Qe1 Ne7 11.Ne5 c5=; B) 6.Ra2 a5 (6...e6 7.Nf3 Bd6 8.0–0 0–0 9.b5 Nb8 10.Be5 Qe7 11.Bd6 Qd6=) 7.b5 Na7 8.a4 c6 9.bc6 Nc6 10.Nf3 e6 11.Nc3 Rc8=; C) 6.Nf3 e6 (6...Bg4 7.0–0 e6 8.Nc3 Bd6 9.Nb5 e5 10.Nd6 Qd6 11.d3 Bf3=) 7.b5 Na5 8.Ne5 Bd6 9.0–0 c6 10.a4 0–0 11.f4 Qc7=.

5.Be2 Bf5 A) 6.b5 Nb8 (6...Na5 7.Nf3 Nc4 8.Bf6 ef6 9.Nd4 Bc8 10.Bc4 dc4 11.Qe2 Qd5+=) 7.Nf3 a6 8.Nc3 ab5 9.Nb5 Bg4 10.Be5 Na6 11.0–0 e6=; B) 6.Bb5 a5 (6...Qd6 7.Nf3 0–0–0 8.0–0 h6 9.Be2 e6 10.b5 Ne7 11.Be5 Qd7+=) 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 Qd6 10.Bc3 Bd7 11.Bc6 Bc6=; C) 6.Nf3 a6 (6...Qd6 7.b5 Na5 8.d3 a6 9.Be5 Qb6 10.ba6 Ra6 11.Nbd2 Nc6+=) 7.0–0 Qd6 8.b5 ab5 9.Bb5 Bg4 10.a4 e6 11.Ba3 Qd7=.

5.Nf3 Qd6 A) 6.Bd3 a6 (6...Bg4 7.h3 Bf3 8.Qf3 a5 9.ba5 e5 10.Bb5 Ra5 11.Bc6 bc6=) 7.0–0 Bg4 8.h3 Bh5 9.c4 dc4 10.Bc4 e5 11.d3 Rd8+=; B) 6.Bb5 Bg4 (6...0–0–0 7.Be2 Bf5 8.b5 Na5 9.0–0 e6 10.Ne5 Bg6 11.Bd4 Kb8+=) 7.h3 Bf3 8.Qf3 a6 9.Ba4 b5 10.Bb3 e5 11.0–0 Rd8=; C) 6.b5 Nd8 (6...Na5 7.Bc3 Nc4 8.d3 Nb6 9.Be2 Bg4 10.Be5 Qd7 11.a4 e6=) 7.Be5 Qd7 8.Nd4 c5 9.Ne6 Qe6 10.d4 Nd7 11.Bf4 Qf6=.

5.Nf3 Bd7 A) 6.Be2 e6 (6...Bg4 7.0–0 e6 8.Nc3 Bd6 9.Nb5 e5 10.Nd6 Qd6 11.d3 a6=) 7.b5 Na5 8.Ne5 Bd6 9.0–0 c6 10.a4 0–0 11.f4 Qc7=; B) 6.b5 Na5 (6...Nb8 7.Nc3 e6 8.Bd3 c5 9.bc6 Nc6 10.Nb5 a6 11.Bf6 gf6=) 7.Ne5 Bf5 8.Bc3 c5 9.bc6 Nc6 10.Bb5 Qb6 11.Qe2 a6=; C) 6.Bd3 e6 (6...Bg4 7.h3 Bh5 8.Bb5 Qd6 9.g4 Bg6 10.Be5 Qd7 11.Bf4 a6+=) 7.b5 Na5 8.Ne5 c5 9.bc6 Nc6 10.0–0 Bd6 11.Nd7 Qd7=.

5.Nf3 Bg4 A) 6.Bb5 a5 (6...Qd6 7.h3 Bf3 8.Qf3 a6 9.Bc6 Qc6 10.Bf6 gf6 11.Nc3 Rd8+=) 7.ba5 Ra5 8.Bc6 bc6 9.0–0 e6 10.d3 Bd6 11.h3 Bh5=; B) 6.Bd3 e6 (6...e5 7.b5 e4 8.bc6 bc6 9.Be2 ef3 10.Bf3 Bf5 11.Bd4 Be7=) 7.b5 Na5 8.Bc3 c5 9.bc6 Nc6 10.h3 Bh5 11.Ra2 Rb8+=; C) 6.h3 Bd7 (6...Bh5 7.Bb5 Qd6 8.g4 Bg6 9.Be5 Qd7 10.Bf4 a6 11.Ne5 Qe6+=) 7.Be2 e6 8.b5 Na5 9.Ne5 Bd6 10.0–0 0–0 11.f4 Ne4=.

5.Nf3 a6

6.b5 ab5 (6...Nb8 7.Ne5 ab5 8.Bb5 c6 9.Be2 Bf5 10.0–0 e6 11.Nf3 Bd6=) 7.Bb5 Bd7 8.Nc3 e6 9.0–0 Bd6 10.a4 0–0 11.Be2 e5 =.

6.Bd3 Qd6 (6...Bg4 7.Be2 e6 8.0–0 Bd6 9.d3 e5 10.c4 dc4 11.dc4 e4=) 7.0–0 Bg4 8.h3 Bh5 9.b5 Bf3 10.Qf3 Ne5 11.Qe2 Nd3 =.

6.Be2 Qd6 7.0–0 Bf5 8.Nh4 Bd7 9.f4 g6 10.Nf3 Bf5 11.Be5 Qd8 +=.

6.Be2 Bf5 7.0–0 Qd6 8.b5 ab5 9.Bb5 Bg4 10.h3 Bh5 11.a4 e6 =.

6.Be2 g6 7.Bf6 ef6 8.d4 Bd6 9.Nbd2 b5 10.Nb3 0–0 11.h4 h5 12.c3 f5 13.g3 Re8 14.Nc5 Qb8 15.0–0 Qb6 16.a4 Ne7 17.ab5 ab5 18.Qb3 Ra1 19.Ra1 c6 20.Qa3 Qb8 21.Kg2 Qc8 22.Qa6 Qa6 23.Ra6 Bc5 24.bc5 Kf8 25.Ne5 Rc8 26.f4 f6 27.Nd3 Rd8 28.Nb4 Bd7 29.Kf2 Kg7 30.Bd1 Kg8 31.Bb3 Kf7 32.Ra7 Kf8 33.Kf3 Nc8 34.Ra8 Re8 35.Kf2 Rd8 36.Ra6 Ne7 37.Ke2 Kg8 38.Kd2 Kf7 39.Ra7 Ke8 40.Bc2 Nc8 ½–½. orangutandu – naojp, internet, 2013.

6.Bf6 ef6 7.d4 Bd6 8.Bd3 0–0 9.0–0 Re8 10.Nbd2 a5 11.b5 Na7 =.

6.Bf6 gf6 7.Be2 (7.d4 Rg8 8.Rg1 Bg4 9.h3 Bf5 10.c4 dc4 11.Bc4 e6+=) 7...Bg7 (7...Rg8 8.Rg1 Bf5 9.d4 e5 10.c4 ed4 11.cd5 Qd5=) 8.0–0 (8.d4 Bf5 9.c4 dc4 10.Bc4 e5 11.Nc3 ed4+=) 8...f5 (8...Rg8 9.d4 Bg4 10.h3 Bf5 11.Nh4 Bd7+=) 9.c3 (9.d4 Rg8 10.Bd3 Qd6 11.Nbd2 0–0–0+=) 9...Qd6 (9...f4 10.ef4 Qd6 11.b5 ab5=) 10.Ng5 (10.d4 f4 11.Nbd2 Bf5=) 10...Ne5 (10...Rg8 11.d4 Bd7=) 11.d4 (11.Ne6 Qe6=) 11...Ng6 (11...Ng4=) 12.Ne6 Qe6 13.Nd2 f4 14.ef4 Nf4 15.Re1 0–0–0?? (better is 15...Qg6 16.g3 Ne2 17.Qe2 e6=) 16.Bg4+– Qg4 1–0. mckenna215 (1985) – diggerdogwoofwoof (1655), ChessWorld.net, 2011.

4.a3 Bf5

5.c4 dc4 6.Bc4 e6 7.d4 (7.Nf3 a6=) 7...Ne7 (7...Bd6 8.Nf3=) 8.Bd3 Bd3 9.Qd3 Ned5 (9...a5 10.b5=) 10.Ne2 (10.Qb5 Nd7 11.Qb7 a5+=) 10...Bd6 11.Nbc3 0–0 12.0–0 a6 13.e4 Nc3 14.Nc3 Nd7 15.e5 Be7 16.Ne4 Bg5 17.Qg3 Bh6 18.Bc1 Bc1 19.Rac1 a5 20.b5 c6? 21.bc6+– bc6 22.Nd6 Rb8 23.Rc6 Rb2 24.Rfc1 Qa8 25.R6c2 Qd5?? 26.Rb2+– Qd4 27.Rbc2 h6 28.Rc4 Qe5 29.Ne4 Rc8 30.Rc8 Nf8 31.R1c5 Qd4?? 32.h3 Kh7 33.Rf8 Qc5 34.Nc5 g5 35.Ne6! 1–0. slavisa3 – CharliecChess1, Live Game Caissa's Web, 2004.

5.d4 e6 6.c4 dc4 7.Bc4 Bd6 8.Nf3 0–0 9.Nc3 Qd7 10.Nh4 Be4 11.Ne4 Ne4 12.Bd3 Nf6 13.0–0 e5? (13...a6 14.Qc2+=) 14.d5?? (Better is 14.b5 Nd4 15.ed4+–) 14...Ne7 (14...Nd5 15.Nf3=) 15.e4+= Ng6 16.Ng6 fg6 17.f3 a5 18.Qd2 ab4 19.ab4 b6 20.Ra8 Ra8 21.Ra1 Ra1 22.Ba1 Qa4 23.b5?? Qa1 24.Kf2 Qa3 25.Qc2 Qb4 26.Be2 Qc5 27.Kg3 Qc2 0–1. slavisa3 – Charliechess1, Live Game Caissa's Web, 2004.

5.d4 e6 6.c4 Be7 7.Nf3 0–0 8.Nc3 Re8 9.c5 Ne4 10.Bd3 Bf6 11.0–0 Qd7 12.Be4 de4 13.Nd2 e5 14.Nde4 Kh8? (Better is 14...ed4!? 15.Nf6 gf6+/–) 15.Nf6+– gf6 16.d5 Ne7 17.e4 Bg6 18.f4 Ng8? (18...f5+–) 19.f5 Bh5 (19...Rad8 20.Qf3+–) 20.Qh5 Rf8 21.Rf3 Ne7 (21...Rfd8 22.Rd1+–) 22.Rh3 1–0. Loulou – adamant, HCL–B1732 playchess.de, 2003.

5.d4 e6 6.Bd3 Bg4 7.Nf3 Bd6 8.h3 Bh5 9.Nbd2 Ne7 10.c4 dc4 11.Nc4 0–0 12.0–0 Ned5? (12...Bg6 13.Rc1=) 13.Nd6 (better is 13.e4+–) 13...Qd6 14.Be2 Bg6 15.Ne5 Bf5 16.g4 Bg6 17.Bd3 Ne4 (17...Bd3 18.Qd3 Nb6 19.Rad1=) 18.Qc2 (18.Ng6 Nf2 19.Rf2 (19.Kf2 fg6 20.Ke1 Ne3–+) 19...fg6 20.Qe1 Qg3 21.Rg2 Qh3 22.Bc1+/–) 18...f6?? (better is 18...Ng5 19.Bg6 fg6=) 19.Nc4 (better is 19.Ng6 Ne3 20.fe3 Qg3 21.Qg2 Qe3 22.Kh2 Qd3 23.Nf8 Rf8 24.Rae1+–) 19...f5?? (better is 19...Qc6 20.Be4 Be4 21.Qe4 Qc4 22.Qe6 Kh8+/–) 20.Nd6+– cd6 21.Be4 (better is 21.gf5!? ef5 22.Rac1 Rfe8+–) 21...fe4 22.Rac1 Rf3 23.Qe2 Rh3 24.Kg2 (better is 24.Qb5!? Nb6 25.Rc7 d5+–) 24...Rh4 (24...Rf3 25.Qb5 Rf7 26.Rc2+–) 25.Rh1 (25.Rh1 Rh1 26.Rh1+–) 1–0. Fournier,Frederic (1935) – lapin (1955), Echecs21, 2003.

4.a3 Bg4

5.Be2 Be2 6.Ne2 e5 7.b5 Na5 8.Be5 Nc4 9.Bd4 Ne4? 10.d3+– c5 11.bc6 bc6 12.dc4 c5 13.Be5 Qa5 14.c3 f6 15.Qd5 Rd8 16.Qe4 fe5 17.Qe5 Be7 18.Qg7 Kd7 19.Nf4 Rdg8 20.Qf7 Rf8 21.Qd5 Bd6 22.Nd2 Qc3 23.Qb7 Bc7 24.Qc7! Kc7 25.Nd5 Kc6 26.Nc3 Rf5 27.Nde4 Rhf8 28.Rd1 Rf2. Trkn – guest7272, ICC, 2004.

5.Be2 Bf5 6.Nf3 e6 7.c4 Ng4 8.d4 Bb1 9.Rb1 Qb8 10.cd5 ed5 11.Bb5 Qd8 (11...a6 12.Bc6 bc6 13.0–0+/–) 12.h3 Qh4?? (better is 12...Nf6 13.Ne5 a6 14.Nc6 Qd6+–) 13.Nh4 0–0–0 14.hg4 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.b5 Nb4??

5.a3 Nc2 6.Qc2 Bd7 7.Bf6 ef6 8.Nc3 g6?! 9.Nd5 Bf5 10.Nc7 Kd7 11.e4 Be4 12.Qe4 Qc7 13.Be2 Re8 14.Qd4 Kc8 15.Qa7 Qe5 16.Rc1 Kd7 17.Qb7 Kd8 18.Rc8# 1–0. Caissa – Checker, Live Game Caissa's Web, 2006.

5.a3+– Bg4 6.f3 Nc2 7.Qc2 Be6 8.Ne2 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 g6 12.Be5 Bf5 13.d3 Qd7 14.Nd4 Kd8 15.Nf5 gf5 16.Bf6 ef6 17.d4 Bb4 18.Kf2 Qe6 19.f4 Re8 20.Qd3 Qe4 21.Qe4 Re4? 22.Bd3 Re8 23.Bf5 h5 24.Rc1 h4 25.Nc3 c6 26.bc6 bc6 27.Rc2 Bc3 28.Rc3 Kc7 29.g3 Rh8 30.Kg2 Rg8 31.g4 Ra8 32.Kh3 Ra2 33.Rc2 Rc2 34.Bc2 Kb6 35.Kh4 c5 36.dc5 Kc6 37.g5 (37...Kc5 38.gf6+–) 1–0. hal1958 – The_Kasparov, playchess.de, 2002.

4.Bb5 e5

5.a3 Ne4 6.d3+/– a6? (better is 6...Nf6+/–) 7.Bc6+– (7.de4?! ab5 8.ed5 Ne7 9.Be5 Nd5+/–) 7...bc6 8.de4 Bd6 9.Nf3 (better is 9.c4!? dc4 10.Nf3 f6+–) 9...de4 10.Nfd2 a5 11.Ne4 ab4 12.g3 (better is 12.Nd6!? cd6 13.ab4 Ra1 14.Ba1 0–0+–) 12...ba3 13.Na3 Bb4 14.c3 (14.Ke2 Qd5 15.f3 f5+–) 14...Be7 (14...Qd1 15.Kd1 Ba3 16.Kc2+– (16.Ra3?! Bg4 17.Kc2 Ra3 18.Ba3 Bf3 19.Nf6 gf6+=; worse is 16.Ba3 Bg4 17.Kd2 Bf3+=)) 15.Qb3 (better is 15.Qd8!? Kd8 16.h4+–) 15...Qd5+/– 16.Qd5 cd5 17.Nd2 e4? (17...Rb8!? 18.0–0–0 c6+/–) 18.Nb5 (18.c4 Be6+–) 18...Rb8 19.Nc7 Kd8 20.Nd5 Bc5?? (better is 20...Rb2 21.Nc4 Rb7+–) 21.Ne4 (better is 21.0–0–0 f5+–) 21...Bf8 (21...Rb2 22.Nb4 Rb4 23.cb4 Bb4 24.Ke2 f5 25.Rhd1 Kc7+–) 22.Rb1 (22.0–0–0 Bg4 23.Rd4 Bf3+–) 22...Bf5 23.f3 h5 24.0–0 Rb5 25.c4 Rb3 26.Bd4 Rd3 27.Bb6 Kc8 28.Rfd1 Ra3 29.c5 Kb7 30.Bc7 Kc6 31.Rb6 Kd7 32.Nb4 Kc7+– 33.Nd5 Kd7 34.Ndc3 Ke8 35.Nd6 Bd6 36.Rbd6 Rc3 37.Rd8 Ke7 38.Rh8 Rc5 39.Rhd8 Bc2 40.R1d7 Ke6 41.Rb7 Be4 42.fe4 Ke5 43.Re7 Kf6 44.Red7 Re5 45.Kf2 Re4 46.Kf3 Rc4 47.Rd6 Kg5 48.Rd5 f5 49.Rg8 Kf6 50.Rf8 Kg6 51.Rff5 Rg4 52.Rh5 Kf7 53.Kg4 g6 54.Rh7 Ke6 55.Rhd7 Kf6 56.e4 Ke6 57.Ra7 Kf6 58.Ra6 Kg7 59.Kg5 Kf7 60.Rg6 Ke7 61.h4 Kf7 62.h5 Ke7 63.h6 Kf7 64.Rd7 Ke8 65.Rgg7 Kf8 66.e5 Ke8 67.e6 1–0. Willi_weizenkeim – LADY, playchess.de, 2002.

5.Be5 Bb4 6.Nc3 =.

5.Nf3 Bd6 6.Ne5+/– Be5 7.Be5 Bd7 8.Bc6 Bc6 9.0–0 0–0 10.Nc3 a6 11.d4 Bd7 12.Qf3 Ne4 13.Ne4 de4 14.Qe4 Bc6 15.Qf4 Qe8 16.Bc7 Qe6 17.Rfd1 (17...Bd5 18.Be5+–) 1–0. Wall,Bill – Landrio,Bruno, Internet, 2006.

5.Nf3 Bd7!? =.

3.e3 Qd6

4.a3 Nc6 5.Nf3 Ne5?? (better is 5...Bg4=) 6.Be5+– Qb6 7.Bd4 Qc6 8.Be2 e6 9.0–0 Bd6 10.d3 (10.Nc3 a6+–) 10...0–0 11.Bf6 gf6 12.Nbd2 e5 13.c4 e4 (13...Rd8 14.cd5 Qd5 15.Qc2+–) 14.de4 (14.cd5!? Qd5 15.Ne4 Be7+–) 14...de4 15.Nd4 Qd7 (15...Qe8 16.c5 Be5 17.Ne4 Bh2 18.Kh2 Qe4 19.Rh1+–) 16.Ne4 Kh8 17.Nd6 cd6 (17...Qd6 18.Bd3+–) 18.Nf3 (18.Nb5!? Rd8+–) 18...Rg8 19.g3 Qe6 20.Nd4 Qd7 (20...Qe7 21.Qd3+–) 21.Bf3 Qe7 22.Bg2 Rb8 (22...Be6 23.Qd3+–) 23.Rc1 b6 (23...Bg4 24.Qd3+–) 24.Qc2 (better is 24.Nc6 Qc7 25.Nb8 Qb8+–) 24...Bb7 25.Nc6 Bc6 26.Bc6 Rbc8 27.Bd5 Qe5 28.Qe4 f5 29.Qe5 de5 30.Bf7 Rg7 31.Be6 f4 (31...Rf8+–) 32.Bc8 fg3 33.fg3 1–0. Fournier,Frederic (1955) – sucusucu, Active, 2011.

4.a3 e5 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.e3 Nf6).

4.a3 g6 5.d4 (5.Nf3 Nbd7 6.c4 Bg7 7.Nc3 dc4 8.Bc4 0–0 9.Nb5 Qb6 10.Rc1+= ; 5.Nc3 Bg7 6.Nb5 Qd8 7.Be5 Na6 8.c4 c6 9.Nc3 Nc7 10.d4=) 5...a5 (5...Bg7 6.c4 (6.Nf3 0–0 7.c4 Bg4 8.Nc3 a5 9.b5 dc4 10.Bc4+=; 6.Bd3 a5 7.b5 Bf5 8.Bf5 gf5 9.Qf3 Qd7 10.Qe2=; 6.Be2 Bf5 7.Nf3 0–0 8.c4 dc4 9.Bc4 Nbd7 10.0–0=; 6.Nd2 0–0 7.c4 Bg4 8.Ngf3 a5 9.ba5 Nc6 10.cd5+=) 6...0–0 7.Nc3 Bg4 8.Nf3 a5 9.b5 dc4 10.Bc4+=; 5...Bf5 6.c4 a5 7.Qa4 Qd7 8.b5 Qd8 9.Nc3 Nbd7 10.Qb3+=; 5...Bg4 6.Nf3 Bg7 7.Be2 Nbd7 8.Nbd2 0–0 9.c4 a5 10.b5=) 6.c3 (6.b5 Bg7 7.c4 Bg4 8.Nf3 0–0 9.Nc3 dc4 10.Bc4=; 6.ba5 Bg7 7.c4 0–0 8.Nc3 Ra5 9.cd5 Nd5 10.Nd5=) 6...Bg7 7.Nd2 (7.Nf3 Bg4 8.Be2 0–0 9.0–0 Nbd7 10.Nbd2=) 7...0–0 8.Ngf3 Bg4 (8...Bf5 9.Be2 Nbd7 10.Nh4=) 9.Be2 (9.Bd3 Nbd7 10.Qc2=) 9...Nbd7 10.c4 (10.b5=) 10...c6 (10...Bf3 11.Bf3 ab4 12.Qb3=) 11.c5 Qc7 12.b5 cb5 (12...b6 13.Rc1 Rfc8 14.0–0=) 13.Bb5+= Ne4 14.Qb3 Bf3 15.Nf3 a4 16.Qb4 Nb8 17.Nd2 (17.Bd3 Nc6 18.Qb6 Qb6 19.cb6 Nc5 20.dc5 Bb2=) 17...Nc6= 18.Bc6 bc6 19.Ne4 de4 20.Qc4 Rfb8 21.Bc3 Qb7 22.Bb4 (22.Rc1 Qb3 23.Bb4 e5 24.de5 Be5 25.Qe4 Bb2+=) 22...Qb5 23.Rc1 (23.Qc2 e5 24.de5 Re8=) 23...Qc4 24.Rc4 f5 25.Ke2 Kf7 26.Rd1 Ke6 27.f3 Kd5 28.Rc2 Rc8 29.f4 Bf6 30.Rb1 Rab8 31.Rcb2 Rb5 32.Bd2 Rcb8 33.Rb5+= cb5 34.g3 g5 35.fg5 Bg5 36.Rc1 e6 37.Ba5+= Rc8 38.Rf1 h5 39.Rb1 Kc6 40.Bb4 Rg8 41.h4 Bd8+= 42.Be1 Bc7 43.Bf2 Rg4 44.Rg1 e5 45.Kd2 ed4 46.ed4 f4 47.gf4 Bf4 48.Ke2? Rg1 49.Bg1 b4! 50.Kd1 ba3 51.Kc2 e3 52.Kb1 e2 53.Bf2 Be3!! (53...Be3 54.d5 Kd5–+) 0–1. Begaj,Agron – Ari,Zeki (2175), 23rd ECC Men, Kemer TUR, 2007.

4.b5 Nbd7 5.Nf3 e5 6.Be2 c5 7.c4 (7.0–0!?=) 7...e4–/+ 8.Nh4 Ne5 (8...dc4 9.Na3–/+) 9.0–0 (9.cd5 Nd5 10.f4 Ng6 11.Ng6 Qg6+= (worse is 11...fg6 12.Be5 Qd8 13.0–0+=)) 9...Neg4 (9...Nfg4!? 10.g3 Nc4 11.Bc4 dc4–/+) 10.g3 Ne5 11.a4 (11.cd5 Bh3 12.Ng2 A) 12...Qd5? 13.Nf4 Qd7 14.Nh3+– (14.Be5?! Bf1 15.Bf1 Bd6 16.Bf6 gf6+–); B) 12...Nd5+=) 11...Bh3–/+ 12.Re1 Nc4 13.Bc4 dc4 14.Qc2 Rd8 (14...Qd3 15.Rc1 Be7 16.Na3–/+) 15.Qc4 (better is 15.Bf6!? Qf6 16.Qe4 Be6 17.Ra2+=) 15...Be7–+ 16.Ng2 0–0 17.Nf4 Be6 (17...Bf5 18.a5–+) 18.Qc2 (better is 18.Ne6!? fe6 19.a5+=) 18...Bg4–/+ 19.Nc3 (19.Bf6!? Bf6 20.Ra3–/+) 19...Qd2–+ 20.Qd2 (20.Rec1 Rd7–+) 20...Rd2 21.Ba3 Rd7 (21...g5 22.Bc1 Rd7 23.Nfe2–+) 22.Ra2 Rfd8 23.Raa1 g5 24.Ng2 Rd3 25.Ne2 b6 26.Bb2 (26.Nc1–+) 26...Rd2 27.Rab1 Re2 28.Re2 Be2 29.Bc3 (29.h4 h6 30.hg5 hg5–+) 29...Rd1 30.Rd1 Bd1 31.a5 Be2 32.ab6 ab6 33.Ne1 Bb5 34.Nc2 (34.f3 Bc6 35.Kf2 b5–+) 34...Nd5 35.Bb2 (35.Be5 Bd3 36.Ne1 c4–+) 35...Bd3 36.Ne1 b5 0–1. Valpa – Orange, playchess.de, 2002.

4.b5 g6 5.Nf3 Bg7 (5...Nbd7 6.c4=) 6.c4 Bg4 (6...0–0 7.cd5 Qd5 8.Nc3=) 7.h3 (7.h3 Bf3 8.Qf3+=). Ral – prisonbreak, internet, 2007.

4.Bf6 Qf6 5.Nc3 e6 =+.

4.a3 a5

5.ba5 Ra5 A) 6.Bc3 Ra8 (6...Ra7 7.Nf3 Bg4 8.Bd4 Ra5 9.Ra2 Nbd7 10.Bc3 Ra7+=) 7.Nf3 Bg4 8.Ra2 Nbd7 9.Rb2 b6 10.d4+= (10.h3 Bf3+=) 10...Ne4+=; B) 6.Nf3 Bg4 7.Nc3 Nbd7 8.Nb5 Qb6 9.Rb1 e5 10.Bc3+= Ra8+=.

5.ba5 e5 6.Nc3 Ra5 7.Nb5 (7.Nf3 Nbd7 8.a4 c6 9.Ba3 Qc7 10.Bf8+= Nf8+=) 7...Qe7 8.d4 Qd7 9.de5 Rb5 10.ef6 Rb2 =.

5.ba5 e5 6.d4 A) 6...e4 7.c4 Be6 8.c5 Qd7 (8...Qd8 9.Ne2 Be7 10.Nf4= 0–0=) 9.Qb3 Nc6 10.Bc3 Ra7=; B) 6...Nbd7 7.de5 Ne5 8.Nd2 Ra5 9.Ngf3 Nf3 10.Nf3 Be7=; C) 6...Nc6 7.Nf3 e4 8.Ne5 Na5 9.Bc3 Qe6 10.Qd2 Qb6+=; D) 6...ed4 7.Bd4 Nc6 8.Bc3 Be7 9.Nf3 0–0 10.Bd3 Ne4+=.

5.ba5 e5 6.Be2 Ra5 (6...Be7 7.Nf3 Nbd7 8.d4 e4 9.Ne5 0–0 10.c4 Qa6=; 6...Nbd7 7.d4 Ra5 8.de5 Ne5 9.Nd2 Be7 10.Ngf3 Nf3=; 6...Bf5 7.Nf3 Nbd7 8.c4 Ra5 9.Bc3 Ra8 10.d4 dc4+=) A) 7.Bc3 Ra8 8.Nf3 Nbd7 (8...e4 9.Nd4 Be7 10.0–0 Na6+=) 9.0–0 Qe6 10.Bb2+= 10...Bd6+=; B) 7.d4 ed4 8.Bd4 Ne4 9.Nf3 Nc6 10.0–0 Nd4+=.

5.ba5 e5 6.Nf3 Nbd7 7.d4 e4 A) 8.Ne5 A1) 8...Ra5 9.c4 Qe6 10.Qd2= (10.Nd2 Qf5=) 10...b6=; A2) 8...Be7 9.c4 0–0 10.Nd2 Qe6=; B) 8.Nfd2 Ra5 9.c4 Qe7 10.Bc3 Ra7=.

5.Nc3 e5 6.Nf3 e4 7.Nb5 Qd8 8.Be5 Na6 9.Ng1 Be7 10.ba5 0–0 +=.

4.a3 Nbd7

5.Nc3 A) 5...a6 6.d4 (6.f4 e5 7.fe5 Ne5 8.Be2 Qe7 9.Na2 Bg4 10.Be5 Qe5+=) 6...a5 (6...e5 7.de5 Ne5 8.Be2 Nc4 9.Bc4 dc4 10.Nf3 Bg4=) 7.b5 e6 (7...e5 8.de5 Ne5 9.Qd4 Ng6 10.Rd1 Be6=) 8.Nf3 Be7 9.Bd3 0–0 10.0–0= c5=; B) 5...c6 B1) 6.Nge2 e5 (6...Nb6 7.Ng3 e5 8.Be2 d4 9.ed4 ed4 10.Nce4 Ne4=; 6...b5 7.a4 ba4 8.Ba3 e5 9.b5 Qc7 10.bc6 Qc6=; 6...a5 7.b5 e5 8.Ng3 Nb6 9.Rb1 Be7 10.bc6 bc6+=) 7.Ng3 b5 8.Be2 (8.a4 ba4 9.b5 a6 10.ba6 Qb8+=) 8...a5 9.ba5 Ra5 10.0–0 (10.d4+= e4+=) 10...Qe6+=; B2) 6.d4 B21) 6...a5 7.b5 e5 8.de5 Ne5 9.Qd4 (9.Be2 Bg4 10.Nf3 Bf3=) 9...c5 (9...Ng6 10.Nf3= Be7=) 10.Qf4 d4=; B22) 6...e6 7.Nf3 Be7 8.Bd3 b5 9.0–0 a5 10.ba5 Ra5=; C) 5...e5 C1) 6.Nf3 C11) 6...a6 7.Be2 Be7 8.0–0 0–0 9.Ne1 (9.Ra2 Re8 10.Qa1+= Qe6+=) 9...Rd8 10.Nd3 b6+=; C12) 6...c6 7.Be2 Be7 8.0–0 0–0 9.Nh4 Nb6 10.Nf3 a5+=; C2) 6.f4 a6 (6...c6 7.fe5 Ne5 8.Be2 Neg4 9.Nf3 Ne4 10.Ne4 de4=) 7.fe5 Ne5 8.Be2 Qe7 9.Na2 Bg4 10.Be5 Qe5+=; C3) 6.Be2 c6 (6...a6 7.Nf3 Be7 8.0–0 0–0 9.Ng5 h6 10.Nf3 Re8+=; 6...Be7 7.Nf3 a6 8.0–0 0–0 9.Ng5 h6 10.Nf3 b5+=) 7.Nf3 Be7 8.0–0 0–0 9.Nh4 Nb6 10.Nf3 a5+=; C4) 6.Nb5 Qc6 (6...Qb6 7.d4 e4 8.c4 c6 9.Nc3 Be7 10.Qb3 0–0=) 7.f4 ef4 8.ef4 Be7 (8...Bd6 9.Nd6 Qd6 10.Qe2 Kd8=) 9.Be2 (9.Nf3 0–0 10.Be2+= a5+=) 9...a5 10.Nd4 Qb6=.

5.c4 A) 5...dc4 6.Bc4 Qc6 7.Bf1 e5 8.d4 e4 9.Nc3 a5 10.Rc1 Qb6=; B) 5...a5 B1) 6.Qa4 dc4 (6...e5 7.d4 c6 8.c5 Qe6 9.de5 Ne5 10.Nh3 Ne4=) 7.Bc4 Nd5 8.Bd5 Qd5 9.Nf3 c6 10.Nc3 Qd3+=; B2) 6.b5 e5 7.d4 Be7 8.de5 Ne5 9.cd5 Nd5 10.Nd2 0–0=; B3) 6.c5 Qc6 7.Nf3 ab4 8.Nd4 Qa4 9.Qc1 Qa7 10.ab4 Qb8+=; C) 5...e5 6.d4 a5 (6...e4 7.Nc3 dc4 8.Bc4 Nb6 9.Bb3 a5 10.Qc2 Qe7=) 7.b5 Be7 8.Nd2 0–0 9.de5 Ne5 10.cd5 Nd5=.

5.Nf3 e5 6.c4 A) 6...e4 7.c5 Qe7 8.Nd4 Ne5 9.f4 (9.Nc3 Bg4 10.f3 Bh5=) 9...ef3 10.Nf3= 10...Ned7=; B) 6...a5 7.c5 Qe6 8.Nc3 Be7 9.Nb5 Bd8 10.Be2 0–0=.

4.b5 c5

5.c4 e5 6.Qb3 (6.cd5!? Nd5 7.Nc3=) 6...Be6+= 7.Nf3 Nbd7 8.Ng5 dc4 (8...Bf5 9.cd5 e4 10.d3 ed3 11.e4 Ne4 12.Bd3+=) 9.Bc4 Bc4 10.Qc4 Qd5 11.Qd5 Nd5 12.Nc3 Nb4 13.0–0 Be7 14.Nf3 c4 15.Ne4 Nd3 16.Bc3 f5 17.Ng3 0–0 Black prepares f4 18.Ne1 N3c5 19.Nc2 f4 20.ef4 ef4 (20...Rf4?! 21.Ne2 Rh4 22.Ne3=) 21.Ne2 Rae8 22.Ned4 Nb6 23.Rfe1 Nd3 24.Re2 Nd5 25.Ne1 Bc5 26.Nd3 cd3 27.Re8 Re8 28.Nb3 Bb6 29.Bd4 Re2 30.Bb6 Nb6 (worse is 30...ab6 31.Rd1=) 31.Kf1 Nc4 32.Rd1 b6 33.Kg1 (33.f3 g5+=) 33...Kf7 (33...Re5!?–/+) 34.Nc1= Nd2 (34...Re5!? 35.Nd3 Rb5 36.Nf4 Ra5+=) 35.Ne2+= de2 36.Re1 f3 37.Kh1 fg2?? (better is 37...Ne4 38.gf3 Nf2 39.Kg2 Nd3 40.Re2 Nf4 41.Kf2 Ne2 42.Ke2 Ke6–/+) 38.Kg2+– Ne4 39.Re2 Nc3 40.Rb2 Ke6 (40...Nd5 41.Rc2+–) 41.a4! Kd5 (41...Na4 42.Ra2 Decoy) 42.Rd2 Ke6 43.Rc2 Ne4? (43...Na4 44.Rc7 g6+–) 44.Rc7 Kf6 45.Ra7 Nc5 46.a5 ba5 47.Ra5 Nd7 48.b6! Ke7 (48...Nb6 49.Ra6 Decoy) 49.b7 Kd8 (49...Kd6 50.Rf5 Nb8+–) 50.Rc5! (50.Rc5 Nb8 51.Rc8 Kd7 52.Rb8+–) 1–0. purplegadge (1685) – sastro (1745), gameknot.com, 2011.

5.Nf3= Bg4 6.Be2 Nbd7 7.a4 (7.h3 Bf3 8.Bf3 e5=) 7...a6 (7...e5 8.0–0=+) 8.c4 (8.ba6 Bf3 9.ab7 Rb8 10.Bf3 Rb7 11.Bf6 Nf6+/–) 8...e5 9.cd5 Nd5 10.Nc3 Nb4 11.d3 f5 12.0–0 Be7 13.Ne1 Be2=+ 14.Qe2 Bf6 15.Rd1 0–0 16.Qf3 Qe6 17.Qb7 Rfb8 18.Qf3 ab5 19.ab5 e4 20.de4+/– fe4 21.Qe4 Qe4 22.Ne4 Bb2 23.Rd7 c4? 24.Nd6+– c3 25.Nc4?? Ra1? 26.Nd3?? Nd3 27.Ra1+= Ba1 28.Na3?? Ra8 29.b6 Ra3 30.b7 Rb3–+ 31.Rd8 Kf7 32.b8Q Rb8 33.Rb8 c2 34.Rc8 c1Q 35.Rc1 Nc1 36.h3 Kf6 37.g4 Nd3 38.f4 Bc3 39.Kg2 Ke6 40.Kf3 Ne1 41.Ke4 Bd2 42.f5 Kf6 43.h4 Be3 44.Ke3 Ng2 45.Ke4 Nh4 46.Kf4 h6 47.Kg3 Nf5 48.gf5 Kf5 49.Kf3 g5 50.Kg3 h5 51.Kf3 h4 52.Kg2 Kf4 53.Kh3 Kf3 54.Kh2 g4 55.Kg1 g3 56.Kh1 g2 57.Kg1 h3 ½–½. Riveline,Maurice – Banderet,Bertrand, FRA–ch op–B Paris, 1994.

4.b5 e5

5.c4 a6 6.Nf3 ab5 7.Be5 Qe6 8.cb5 Qb6 0–1. bispo (2000) – pallen (2120), net–chess.com, 2011.

5.c4 c6 6.a4 (6.Nf3 Nbd7=) 6...Nbd7 7.Nf3 e4 8.Nd4 Ne5 9.cd5 c5 10.Ba3 (10.f4 Neg4 11.Nc2 Nd5=+) 10...Nd5 11.Qc2 f5 (11...Nf6 12.Nc3 Qd8 13.Nb3 Nd3 14.Bd3 ed3 15.Qd1=+) 12.Nc3 (12.d3 Qc7 13.Nb3 ed3–+) 12...Nb4 13.Bb4 cb4 14.Na2 Be7 15.Rb1 0–0 (15...Ng4 16.h3 Ne5 17.Nb4=) 16.Nb4 Bd7 (16...Be6 17.Ne6 Qe6 18.Qb3 Qb3 19.Rb3 Bb4 20.Rb4=) 17.Be2 (17.Qb3 Kh8=) 17...Rac8 (17...Rfc8 18.Qb3 Kh8 19.Qd5+=) 18.Qa2 Kh8 19.0–0 (19.Qd5 Rc7=) 19...Qh6 (19...f4!?=) 20.Qd5+= Bd6 21.g3 (21.f4 ef3 22.Bf3 Nc4=+) 21...Rf6 22.d3 Qh3+= 23.f4 Rh6 24.Rf2 Bb4? 25.Bf1?? Rc5 26.Qe5 Re5 27.Bh3 Rc5 28.Bf5!! Bf5 29.Nf5 Rf5 30.de4 Bc5 31.ef5 Be3 32.Re1 Bf2 33.Kf2 33...Kg8 34.h4 Kf7 35.Rc1 Rd6 36.Rc7 Kf6 37.Rb7 a6 38.g4 ab5 39.ab5 Rd2 40.Ke3 Rb2 41.Rb6 Kf7 42.h5 Rb4 43.g5 Rb1 44.f6 g6 45.Rb7 Kg8 46.hg6 1–0. Danek,Vaclav – Koenig,Vlastislav, Klatovy op, 1995.

5.c4 Bg4 6.Nf3 Nbd7 7.cd5 =+.

5.d4 Nbd7 6.de5 Ne5 7.Qd4 =.

5.Nf3 Nbd7 6.Be2 Qe6 7.d3 Bd6 8.Nbd2 0–0 9.h3 Rd8 10.Qc1 Nf8 (better is 10...a6!? 11.a4 Nc5+=) 11.c4= Ng6 12.cd5 Nd5 13.d4 ed4 14.Nd4 Qe7 15.0–0 Ne3 16.fe3 Qe3 17.Kh1 Qg3 18.N4f3?? (better is 18.N2f3 Nf4 19.Rg1 Nh3 20.Re1+=) 18...Nf4–+ 19.Rg1 Ne2 20.Qc2 (20.Qe1 Ng1 21.Kg1 Qe1 22.Re1–+) 20...Qh2! 21.Nh2 (21.Nh2 Ng3#) 21...Ng3 0–1. Bach,Matthias (2250) – Brunello,Sabino (2590), Copenhagen Denmark, Politiken Cup, 2013.

4.Nf3 Qb4+=

5.Ba3 Qa5 6.c4 dc4 7.Bc4 e6 8.Bf8 Kf8 9.Nc3 Nc6 10.0–0 Ne5 11.Ne5 Qe5 12.d4 Qa5 13.Qb3 c6 14.Rab1 Ke7 15.e4 Rd8 16.e5 Ne8 17.Rfd1 Kf8 18.Ne4 Qc7 19.Qh3 h6 20.Rd3 Qe7 21.g4 (21.a4 Kg8=) 21...Kg8 22.g5 hg5 23.Qh5 g6 (23...f6 24.Rh3 Rd4 25.ef6 Nf6 26.Nf6 Qf6 27.Qe8 Qf8 28.Be6 Be6 29.Qe6 Qf7 30.Rh8 Kh8 31.Qf7+–) 24.Qh6= Qf8 (24...g4 25.Ng5 Nf6 26.ef6 Qf6 27.Ne4+–) 25.Qg5+= Ng7?? (better is 25...Rd7+=) 26.Nf6 (26.Nf6 Kh8 27.Qh6) 1–0. Moehring,Norbert (1810) – Kycler,Jan (1760), Alpenpokal Obersdorf op, 2004.

5.Qc1 Nbd7 6.a4 c6 7.Nc3 Qa5 8.Ba3 e6 9.Bf8 Nf8 10.Ne5 N8d7 11.Nd7 Nd7 12.Qa3 c5 13.Rb1 a6 14.Qb2 0–0 15.Be2 d4 16.Ne4 Qa4 17.0–0? (better is 17.Bf3!?–/+) 17...de3–+ 18.d3 ef2 19.Rf2 b5 Black plans c4 20.c3 c4 (20...b4 21.cb4 Rb8 22.Qd2 cb4 23.d4–+) 21.d4 (21.dc4 bc4 22.Qc1 Ne5–+) 21...Bb7 (21...Qa5!? 22.Rbf1–+) 22.Ra1 Qa1! (22...Be4?! 23.Ra4 ba4 24.Bc4+=) 23.Qa1 Be4 24.Bf3 Bf3 25.Rf3 a5 26.Qa3 Nf6 27.Qc5 Rab8 (27...Rfb8 28.h3–+) 28.Qe5 (28.h3 a4–+) 28...Nd5 Black prepares b4 29.Rg3 g6 30.h4 b4 31.h5 Rb6 (31...bc3?! 32.h6 f6 33.Qe6 Rf7 34.Qd5=; 31...Nc3 32.h6 f6 33.Qc7 Ne2 34.Kf2 Rf7 35.Qb8 Rf8 36.Qc7 Rf7 37.Qc8 Rf8 38.Qe6 Rf7 39.Qe8 Rf8 40.Rg6 hg6 41.Qg6 Kh8 42.Qg7) 32.hg6 fg6 (32...hg6 33.Rh3 f6 34.Qh2=; 32...Nc3?? 33.gh7 Kh7 34.Qg7) 33.Qh5 Rf7 (33...Nc3?! 34.Rg6 hg6 35.Qg6 Kh8 36.Qh6 Kg8 37.Qg6 Kh8 38.Qh6 Kg8 39.Qg6=) 34.Qe2 b3 35.Qc4 (35.Qe4 b2 36.Qb1 a4–+) 35...b2 36.Qc8 Kg7 37.c4 b1Q 38.Kh2 Nf6 (38...Nf6 39.Qc5 Qe4–+) 0–1. Sinclair,Colin – Wells,Daniel J (2015), GBR–ch Major op, 2008.

3.e3 Bd7

4.a3 e6= A) 5.Be2 c5 (5...a5 6.b5 c6 7.Nc3 e5 8.Nf3 Bd6; 5...Bd6 6.Nf3 0–0 7.0–0 a5 8.b5 c6) 6.bc5 Bc5 7.Nf3 Nc6 8.Ne5 Ne5; B) 5.Bd3 c5 (5...a5 6.b5 c6 7.Qe2 Bd6 8.Nf3 0–0; 5...Bd6 6.Nf3 0–0 7.0–0 Qe7 8.Be5 a5; 5...Nc6 6.Nf3 Bd6 7.b5 Na5 8.Ne5 c5) 6.bc5 Bc5 7.Nf3 0–0 8.0–0 Nc6; C) 5.c4 Be7 (5...a5 6.b5 Be7 7.Nc3 0–0 8.Rc1 c6; 5...Bd6 6.c5 Be7 7.Nf3 a5 8.Be2 0–0; 5...dc4 6.Bc4 Bd6 7.Nc3 Nc6 8.Nf3 e5) 6.Nc3 0–0 7.Nf3 dc4 8.Bc4 a5; D) 5.Nf3 c5 (5...Bd6 6.Be2 0–0 7.0–0 a5 8.b5 c6; 5...a5 6.b5 c6 7.bc6 Nc6 8.Be2 Be7) 6.bc5 Bc5 7.Be2 Nc6 8.Ne5 Ne5.

4.b5 c5 5.Nf3 (5.Be2 c4 (5...a6 6.ba6 Na6 7.Nf3 e6 8.Be5 Ng4; 5...e6 6.Nf3 c4 7.Nc3 Bb4 8.Rb1 Qa5; 5...Qb6 6.a4 a6 7.a5 Qd6 8.ba6 ba6) 6.Bf6 gf6 7.Nc3 e6 8.Rb1 Rg8) 5...Bg4 (5...e6 6.Be2= c4 7.Nc3 Bb4 8.Rb1 Qa5; 5...a6 6.Nc3 Qc7 7.ba6 Na6 8.a4 c4; 5...c4 6.Nc3 e6 7.Be2 Bb4 8.Rb1 Qa5) 6.Nc3 (6.h3 Bf5= (6...Bh5 7.g4 Bg6 8.Ne5 e6) 7.Be2 a6 8.0–0 ab5) 6...e5 (6...e6 7.h3 Bf3 8.Qf3 Bd6) 7.h3 Bh5 (7...Bf3!? 8.Qf3 e4=) 8.g4+= Bg6 (8...d4 9.Nb1 e4 10.gh5 ef3 11.Qf3+/–) 9.Ne5+/– Bd6 (9...Be4!? 10.f3 Bd6 11.Ne4 de4+/–) 10.Ng6+– hg6 11.g5 Ng8 (11...Nh7 12.Bg2 Ng5 13.Bd5+–) 12.Nd5 (better is 12.Bg2+–) 12...Ne7? (better is 12...Qg5 13.Qf3 Nd7+–) 13.Bg7 Rg8 (13...Be5 14.Nf6 Bf6 15.Bf6 Qd5+–) 14.Nf6 1–0. marre – edvsr, internet, 2010.

4.b5 e5 5.a4 (better is 5.Be5!? Bf5 6.Nf3+=) 5...e4 6.Be2 Bf5 (6...Bd6 7.Nc3+=) 7.f3 (7.a5 Be6+=) 7...c5 (7...Bd6 8.a5+=) 8.d4 (8.Nc3 Bd6+=) 8...cd4 (8...c4!?–/+) 9.Bd4= ef3 (9...Bb4 10.Nd2=) 10.Nf3+= Ne4 (10...Qa5 11.Nbd2+=) 11.0–0 b6 (11...Qc8 12.a5+=) 12.Nfd2 Qg5 13.Qe1 (13.c4 Bc5 14.Nf3+/– (14.cd5 Bd4 15.ed4 Qe3 16.Kh1 Nf2 17.Rf2 Qf2–/+)) 13...Bb4? (13...Bd6 14.a5 ba5 15.Ra5 Nd2 16.Nd2+=) 14.Ne4 (better is 14.Rf5 Bd2 15.Qf2+– (15.Nd2?! Qf5 16.c4 Nd7=)) 14...Be1?? (better is 14...Be4 15.Qf2 0–0=) 15.Ng5+– f6 16.Rf5 fg5 17.c3 (17.Bf3 Nd7 18.Bg7 Rg8 19.Bd5 Rg7 20.Ba8 Re7+–) 17...Rf8 (17...g4 18.Re5 Kf7 19.Bg4+–) 18.Rf8 Kf8 19.g3 h5 (19...Nd7 20.Na3 Bc3 21.Rf1 Nf6 22.Bc3+–) 20.Na3 Bg3 21.hg3 g6 22.Rf1 Kg8 (22...Ke7 23.c4 Nd7 24.cd5+–) 23.c4 (better is 23.Bf3 Kh7 24.Bd5 Nc6 25.Bc6 Rd8+–) 23...Nd7 24.cd5 (better is 24.Bf3 Rf8 25.Bd5 Kh7 26.Rf8 Nf8+–) 24...Nf8 (24...Rf8 25.e4+–) 25.Bc4 Kh7 26.Rf7 Kg8 27.d6 Rd8 28.Rd7 Ne6 29.Be6 Kf8 30.Rd8 1–0. tanto – gkristiansen, net–chess.com, 2000.

4.b5 e6 A) 5.Nf3 a6 (5...Bd6 6.Be2 a6 7.a4 Qe7 8.Ne5 ab5; 5...c6 6.a4 Bd6 7.Be5 Be5 8.Ne5 Ne4; 5...Bc5 6.Be2 0–0 7.0–0 a6 8.a4 ab5) 6.a4 Bd6 7.Be2 Qe7 8.Ne5 0–0; B) 5.Be2 a6 (5...Bd6 6.Nf3 a6 7.a4 Qe7 8.Ne5 0–0) 6.a4 Bd6 7.Nf3 Qe7 8.Ne5 ab5; C) 5.Be5 Ne4 (5...Be7 6.Nc3 0–0 7.Qf3 c6 8.Rb1 cb5; 5...Bc8 6.Nf3 Nbd7 7.d4 Ne5 8.de5 Nd7) 6.Nc3 a6 7.Ne4 de4 8.Qg4 ab5.

4.Be2 e6 A) 5.b5 a6 (5...Bd6 6.Nf3 a6 7.a4 Qe7 8.Ne5 ab5) 6.a4 Bd6 7.Nf3 Qe7 8.Ne5 ab5; B) 5.a3 c5 6.bc5 Bc5 7.Nf3 0–0 8.Ne5 Bd6.

4.Nf3 a6 5.c4 c6 6.Be2 e6 7.0–0 (7.c5 b6=) 7...Bb4 8.Qb3 Qb6 9.Bd4 c5 10.Bf6 gf6 11.cd5 ed5 12.Nc3 Be6 13.Nd5 Qc6 (13...Qd8!? 14.e4 b5+/–) 14.Nf6 Ke7 15.Qb2 Nd7 16.Nd7 Bd7 17.Ne5 Qd6 18.Nd7 Kd7 19.d4 cd4 (19...Rhg8 20.a3 Qd5 21.g3+–) 20.Rfd1 (20.Qd4?! Qd4 21.ed4 b5+/–; 20.ed4?! b5+–) 20...Ke6 (20...Bc3 21.Qb7 Qc7+–) 21.Rd4 Qb6 (21...b5+–) 22.Rb4 Qc6 0–1. cedgar – vaingrecsky (2285), net–chess.com, 2013.

4.f4 e6 5.a3 =.

4.f4 Bg4 5.Be2= Qd7 (5...Be2 6.Qe2 e6 7.Qb5 Nc6 8.a3=) 6.a3 Nc6 (6...a5 7.Bg4 Ng4 8.b5=) 7.Nf3 0–0–0 (7...e6 8.0–0=) 8.b5+= Na5 (8...Nb8 9.Ne5 Be2 10.Qe2+/–) 9.Ne5+/– Qf5?? (better is 9...Be2 10.Qe2 Qe8+/–) 10.Ng4+– Nd7 (10...Nc4 11.Bd4 Kb8 12.0–0+–) 11.d3 e6 (11...b6 12.Nd2+–) 12.Bc3 b6 13.Ba5 ba5 14.d4 Qe4 (14...h5 15.Nf2+–) 15.0–0 Qg6 16.c4 Nb6 (16...dc4 17.Bc4 Bd6 18.Nc3+–) 17.Ne5 Qf6 18.Qe1 a4 19.Qa5 c5 (19...Kb7 20.Qa6 Ka8 21.c5+–) 20.Qa6 Kc7 (20...Kb8 21.Nc6 Kc7 22.Qa7 Kc8 23.Qb6 cd4 24.cd5+–) 21.Qa7 Kd6 22.dc5 1–0. Kucharkowski,Jens – Graefe,Hartmut, CiF, 2002.

4.b5 a6

5.a4 =.

5.ba6 Na6 6.Nf3= (6.Be2 e6 7.Nf3 Be7 8.Ne5 0–0) 6...Bg4 7.Bb5 c6 8.Ba6 Ra6.

5.c4 dc4–/+ 6.ba6 Na6 7.Bc4 Bc6 8.Nf3 e6 9.Nc3 Be7 10.Ne5 Nc5? (10...Bg2 11.Rg1 Bd6 12.Nf7 Kf7 13.Rg2 Be7+=) 11.Nc6+/– bc6 12.Qc2 0–0 13.0–0 Rb8 14.d4 Nb7 15.Rab1 (15.Rfd1 Nd5+/–) 15...Na5 (15...c5!?+/–) 16.Bd3+– Nd5 (16...Qd6 17.Rfc1+/–) 17.Nd5 (17.Bh7 Kh8 18.Be4 Bd6+–) 17...Qd5 18.Bc3 Nc4 19.e4 Na3 20.ed5 Nc2 21.Bc2 ed5 (21...cd5 22.a4+–) 22.Rfe1 Bd6 (22...Rb1 23.Rb1 Ra8 24.Rb7 Ra2 25.Bb1+–) 23.a4 (23.Ba4 Rb6+–) 23...Rfe8 (23...c5 24.dc5 Bc5 25.a5+–) 24.Re8 Re8 25.Bd3 f6 26.Rb7 Ra8 27.a5 c5 (27...Kf7 28.a6+– (28.Bh7?! g6+–)) 28.dc5 Bc5 29.Rc7 d4 30.Bd2 Bd6 31.Bc4 Kf8 (31...Kh8 32.Rd7 Bc5 33.Kf1+–) 32.Rf7 Ke8 33.Rg7 Rc8 34.Bd3 Bb4 (34...Rc7 35.Rc7 Bc7+–) 35.Bb4 Rc1 36.Bf1 Rb1 37.a6 Rb4 38.Rb7 Ra4 39.Bb5 1–0. Fritz 11 – anony, internet, 2013.

5.Bf6 ef6 6.Nc3 Be6 7.ba6 Na6 8.Qb1 Qc8.

4.Nf3 e6

5.a3 a5 6.b5 Bd6 7.Be2 c6 8.bc6 Nc6.

5.a3 c5 6.bc5 Bc5 7.Be2 Nc6 8.0–0 0–0.

5.a3 Bd6 6.Be2 0–0 7.0–0 a5 8.b5 c6.

5.b5 Bd6 6.Ne5 0–0 7.Nd7 Nbd7 8.c4 dc4 9.Bc4 Nb6 10.Be2 Nfd7 11.0–0 Be5 12.d4 Bf6 13.a4 Rc8 14.a5 Nd5 15.Bc4 c6 16.bc6 Rc6 17.Bd5 ed5 18.Qb3 Rc4 19.Qb7 Qc7 20.Qc7+– Rc7 21.Nc3 Rc3?! 22.Bc3 Rc8 1–0. Bonetti,Shane – inpassing, ICC, 2002.

3.e3 Nbd7

4.b5 e5 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.Bb5 c6 5.Be2 e5 =+.

4.d4 g6 5.c4= c6 (5...dc4 6.Bc4 Nb6 7.Be2=) 6.c5 (6.Nf3 Bg7=) 6...Bg7 7.Nd2 (7.Nf3 b6=) 7...Qc7 (7...b6 8.Ngf3=) 8.f4 (8.Ngf3 b6=) 8...Nf8 (8...b6 9.Qc2=) 9.Bd3 (9.Ngf3 Bf5=) 9...Ng4 10.Qf3 (10.Qe2 Bf5=) 10...Nh6 (10...Bf5 11.Bf5 gf5 12.Ne2=) 11.h3 f6 (11...Bf5 12.Be2=) 12.g4 (12.Ne2 Bf5 13.e4 de4 14.Ne4 0–0–0+=) 12...e5 (12...f5 13.g5 Nf7 14.h4=) 13.fe5 (13.e4 de4 14.Ne4 ef4+=) 13...fe5 (Black gets in control) 14.e4 Be6 15.Qg3 0–0–0 16.de5 Nf7 17.Ngf3 Nd7 (17...de4 18.Be4 Nd7 19.0–0 Nde5 20.Nd4 Rd4 21.Bd4 Nf3 22.Qf3 Bd4 23.Kg2–+) 18.ed5 (18.Nd4 Be5 19.Qe3 Rhe8=+) 18...Bd5 19.Be4 Nde5 20.Ne5 Ne5 21.0–0–0 (21.0–0 Nf3! 22.Rf3 Bb2 23.Qc7 Kc7–/+) 21...Ba2 22.Qa3 Rd2 23.Rd2 Nc4 24.Qa2 Bb2 25.Kc2 Nd2–+ 26.Qe6 Kb8 27.Kb2 Qf4 28.Re1 Rd8 29.Kc2?? Qf2 30.Qe5 Ka8 31.Bd5 Nf3 (32.Re2 Nd4 33.Kb2 Ne2–+) 0–1. Roczniak,Jan – Switala,S, Poland, 1980.

4.Be2 g6 5.Nf3= Bg7 6.0–0 0–0 7.c4 (7.d4 Nb6=) 7...c6 (7...dc4 8.Bc4 Nb6 9.Be2=) 8.a3 Qc7 (8...dc4 9.Bc4 Nb6 10.Be2=) 9.Qc2 Nb6 (9...dc4 10.Qc4 a5 11.Nc3+=) 10.d3 (10.cd5 Nbd5 11.Be5+=) 10...Bf5? (better is 10...dc4!? 11.dc4 Bf5=) 11.cd5+/– Nbd5? (better is 11...Bd7!?+/–) 12.e4+– Ne4? (12...Be6 13.ed5 Bd5+–) 13.Bg7 Kg7 14.de4 Be4 15.Qe4 f5 16.Qh4 h6 17.Nbd2 Nf4 18.Bc4 g5 19.Ng5 Ng6 20.Ne6 Kh7 21.Qd4 Qe5 22.Nf8 Rf8 23.Qe5 Ne5 24.Rfe1 (24...Ng6 25.Nb3+–) 1–0. Olsen,Birger – Methi,Harald, Vadsosjakken op, 1992.

4.Nf3 a5 5.b5 Nb6 6.a4 Bg4 7.Be2 Bf3 (7...e6 8.0–0=) 8.Bf3 Nc4 (8...e6 9.d3=) 9.Qc1 (9.Bf6!? gf6 10.d3+=) 9...Nb2= ½–½. Kiss,T – Csukerda,A, HUN tt2, 1998.

4.Nf3 Ne4 5.Be2 (5.a3 e6=) 5...e5 6.Ne5 (better is 6.a3=) 6...Qf6 (better is 6...Ne5 7.Be5 Qg5+=) 7.Nd3+/– Qd8 (7...Qh6 8.0–0+/–) 8.0–0 f6 (8...Qh4 9.Nc3 c6 10.f4+/–) 9.a3 (9.Bd4 Bd6+/–) 9...Be7 (9...Nb6 10.Bd4+/–) 10.Nf4+– White is in command 10...Ne5 (10...Nb6!?+–) 11.d3 Ng5 12.Nh5 0–0 (12...g6 13.f4 gh5 14.fe5 0–0+–) 13.f4 Nh3 (13...Ngf7 14.fe5 fe5 15.d4+–) 14.gh3 Bh3 (14...Nf7 15.Bg4 Nh6 16.Bc8 Rc8 17.Qf3+–) 15.fe5 Bf1 16.Qf1 (16.Kf1?! fe5 17.Kg2 Bh4+–) 16...fe5 17.Qg2 (17.Qh3 Bd6+–) 17...Bf6 Black intends d4 (17...Bg5 18.Be5 Be3 19.Kh1+–) 18.Nd2 (better is 18.Nf6 Qf6 19.Qd5 Rf7 20.Kh1+– (20.Qb7 Qf2 21.Kh1 Qe1 22.Kg2 Qe2 23.Kg3 Qe3 24.Kh4 Rf4 25.Kg5 Qg1 26.Qg2 Qg2 27.Kh5 Qg4)) 18...d4 (18...Bg5 19.Be5 Be3 20.Kh1 g6+–) 19.Ne4 Qe7 20.Nef6 Rf6 21.Nf6 Qf6 22.Rf1 Qc6 (22...Qd6 23.Qb7 Rd8 24.Qa7 Qg6 25.Kf2+–) 23.Qc6 bc6 24.ed4 ed4 25.Bd4 Re8 26.Bf3 Re6 27.Ba7 Rg6 28.Kh1 h6 29.Re1 (29.Re1 Rf6 30.Kg2 Rg6 31.Kf2+–; 29.a4 Rf6+–) 1–0. Woelfelschneider,Peter – Willoughby,Peter, FICGS, 2006.

4.f4 b6 5.Nf3 e6 6.b5 Bb7 7.a4 c5 8.bc6 Bc6 9.Nc3 a6 10.Ne2 Nc5 11.Ne5 Bb7 12.Nd4 Be7 13.Be2 Rc8 14.0–0 0–0 15.Rf3 Rc7 16.Rh3 Nce4 17.Bd3 Bd6 18.Ng4 Be7 19.Nb3 Ne8 20.Nh6 Kh8? 21.Nf7! Kg8?? 22.Ne5 N8f6+/– 23.Nd4 (23...Qc8 24.Be4 Ne4 25.d3+/–) 1–0. Wiesel,Laszlo – Blum,M, Budapest, 1936.

4.f4 c6 5.Nf3 Qc7 6.c4 e6 7.a3 a5 8.cd5 ed5 9.b5 Bc5 10.Qc2 Bb6 11.bc6 bc6 12.Ne5+= c5 13.Nd7 Bd7 14.Bf6 gf6 15.Nc3 Bc6 16.Rb1 c4 17.Qf5 Qd8 18.g4 0–0 19.Bg2+– d4? 20.Bc6 dc3 21.dc3 (21...Be3 22.Rd1+– (22.Ba8?? Qd2 23.Kf1 Qf2); 21.Be4 Qd2 22.Kf1 Rfb8 23.Qh7 Kf8+/–) 1–0. marus – mantoon, internet, 2001.

4.f4 g6 5.Nf3 Bg7 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 Nbd7).

4.a3 e5

(--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

5.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6).

4.c4 dc4

5.Bc4 Nb6 6.Bb3 Bf5 7.Nc3 e6 8.a3 a5 9.Nf3 (better is 9.b5!?=+) 9...ab4–/+ 10.ab4 Ra1 11.Ba1 Bb4 12.0–0 Bd3 13.Re1 0–0 14.Bc2 c5 15.Ne5 (15.Na2 Ba5–/+) 15...Ba6 16.Ng4 (16.Nb1 Qd5–/+) 16...Ng4–+ 17.Qg4 f5 (17...Qd2 18.Bh7 Kh7 19.Rd1–+) 18.Qg3?? (better is 18.Qd1–/+) 18…Qd2–+ (19.Rb1 Bc3 (19...Qc2 20.Nd1 Kf7 21.Qc7 Ke8 22.Qb6–+) 20.Bc3 Qc3–+) 0–1. wlittle (2185) – millirem (2000), net–chess.com, 2004.

5.Bc4 Nb6 6.Bb5 c6 7.Be2 =+.

5.Bc4 Nb6 6.Be2 Bf5 7.d3 e6 (7...e5 8.a3=+) 8.a3= Bg6 (8...c5 9.e4 Bg6 10.Qb3=) 9.Nf3 Be7 (9...c5 10.bc5 Bc5 11.Ne5=) 10.0–0 (10.Ne5 c6=) 10...0–0 (10...c6 11.Qb3=) 11.Nh4 (11.Ne5 c5+=) 11...Nfd5 (11...c5 12.Ng6 fg6 13.bc5 Bc5 14.Qb3+=) 12.Ng6 hg6 (12...fg6 13.Nc3+=) 13.Nd2 (13.Qc2 Rc8+=) 13...Qd7 (13...a5 14.b5+=) 14.d4 (14.Nc4 Rfd8+=) 14...Na4 15.Qb3 b5 16.e4 (16.Ne4 Rfd8+=) 16...Nf4= (< 16...Nb2 17.ed5 (17.Qb2?! Nf4 18.Nb3 Rad8+=) 17...Nc4 18.Bc4 bc4 19.de6 Qe6 20.Nc4+/–) 17.Bf3 (17.Rae1!?=) 17...Rad8=+ (< 17...Nb2 18.Qb2 a5 19.Nb3 ab4 20.Qd2=) 18.Rfd1 (18.e5 Nb2 19.Qb2 Nd3–/+) 18...Nb2 (18...Nd3 19.Bc3 Nc3 20.Qc3 Qd4 21.Qd4 Rd4 22.Nb3–/+) 19.Qb2 Qd4 (19...Nd3 20.Qc2 Qd4 21.Nb3–/+) 20.Qd4=+ Rd4 21.Nb3 Rd1 (21...Rdd8 22.Rac1 Rd1 23.Rd1=) 22.Rd1= Rd8 23.Rd8 Bd8 24.g3 (24.Nd4 a6=) 24...Nh3 25.Kg2 Ng5 26.Nd4 a6 27.Nc6 Nf3 28.Kf3 Bg5 29.Nb8 Bc1 30.Na6 Ba3 31.Ke3 Kf8 (31...e5!?=) ½–½. Levin,Anatoly – Bromberg,Joshua, US Amateur Team East, 2005.

5.Bc4 e6 6.a3 a5 7.b5 =+.

5.Bc4 e6 6.a3 b6 7.Nf3 Bb7 8.Nc3 c5 9.b5 g6 10.a4 Bg7 11.Qc2 Bf3 12.gf3 0–0 13.h4 Ne5 14.Be2 h5 15.Rg1 Rc8 Black prepares c4 16.0–0–0 (better is 16.f4 Neg4 17.d3=) 16...c4–/+ 17.Kb1 Nd3 18.Rg2 Nd5 19.Nd5? (better is 19.Ba3 Re8 20.Nd5 Qd5 21.Rdg1–+) 19...Nb2 (19...Bb2?! 20.Bd3 cd3 21.Qd3–/+; 19...ed5?! 20.Bg7 Kg7 21.f4+=) 20.Nf4 Nd1 21.Bd1 Qf6 22.Qa2 Rfd8 23.Be2 (23.Kc1 e5 24.Ne2 a6–+) 23...Qh4 (23...Rd2 24.Nd5 Rb2 25.Kc1 ed5 26.Qa3–+) 24.Bc4 Qh1 25.Kc2 e5 26.Rg6 ef4 27.Rc6 Qf3 28.Bf7 Kh8 29.Qc4 (29.Qd5 Rc6 30.bc6 Rd5 31.Bd5 Qd5 32.c7 Qc4 33.Kd1 Qa4 34.Ke1–+) 29...Rc6 30.bc6 fe3 (30...Qf2 31.Qd3 Rd3 32.Kd3 fe3 33.c7 Qd2 34.Ke4 Qc2 35.Ke3 Qc7 36.Bh5 Qe5 37.Kd2 Qh5 38.Ke3 Qe8 39.Kd3 Qa4 40.Ke3 Qd4 41.Kf3 a5 42.Ke2 Qe4 43.Kf2 a4 44.Kf1 Qf3 45.Kg1 Qe2 46.Kh1 Qf1 47.Kh2 Be5) 31.fe3 Qf6 (better is 31...Qg2 32.Qb4 Qc6 33.Bc4 Qe4 34.Kd1 Qe3–+) 32.c7 (32.Kd1 Qf2 33.Bd5 Qg1 34.Kc2–+) 32...Qb2 33.Kd1 Qd2 0–1. combijack (1880) – borisrub (1655), gameknot.com, 2013.

5.Bc4 e6 6.a3 Be7 7.Nc3 (7.Nf3 a5=) 7...0–0 (7...a5 8.ba5 0–0 9.a6=) 8.Nf3 b6 (8...Nb6 9.Be2=) 9.Rc1 (9.d4 Bb7=) 9...Bb7 10.d4 a5 (10...c5 11.bc5 bc5 12.dc5 Nc5 13.0–0=) 11.b5 Rc8 (11...c5 12.0–0=) 12.Qe2 (12.d5 Nc5 13.de6 Ne6=) 12...c6 (12...c5 13.bc6 Bc6 14.e4=) 13.0–0+= c5 14.Rfd1 Rc7 (14...Bf3 15.Qf3 cd4 16.Rd4=) 15.dc5 (15.d5 ed5 16.Nd5 Bd5 17.Bd5 Nd5 18.Rd5 Bf6+=) 15...Bc5 16.Na4 Qa8 (16...Qe7 17.Nc5 Rc5 18.Nd4+=) 17.Nc5 (17.Ne5 Bg2 18.Nd7 Rd7 19.Rd7 Bh3+–) 17...Rc5 18.Bd4 Rc7 (18...Bf3 19.Qf3 Qf3 20.gf3 Rc7+=) 19.Qb2 (19.Bd3!? Bf3 20.Qf3 Qf3 21.gf3 Rc1 22.Rc1=) 19...Bf3=+ 20.gf3 Qf3 21.Be2 Qb7 22.f3 Rfc8 23.Rc7 Qc7 24.Bd3?? e5–+ 25.Bf5 ed4 26.Qd4 Rd8 27.Rd2 Kf8 28.Rc2 Nc5 29.Qb2 Qd6 30.Rc1 Qd2 31.Qd2 Rd2 32.e4 g6 33.Bh3 Ke7 34.Bf1 Nh5 35.Bc4 Nf4 36.Bf1 Nfd3 37.Bd3 Rd3 38.Kg2 0–1. Hoelldorfer,August (1625) – Schuberth,Thomas (1620), Bayern–ch Seniors op, 1997.

5.Bc4 e6 6.Qb3 =+.

4.c4 c6

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Nbd7).

5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.c4).

4.c4 e5

5.a3 a5 =+.

5.b5 Bd6 6.Nf3 0–0 7.Be2 dc4 8.Bc4 Nb6 9.Be2 Bg4 10.0–0 e4 11.Nd4 Be2 12.Ne2 Nc4 13.Bd4 a6 14.a4 ab5 15.ab5 Ra1 16.Ba1 Ne5 17.Be5 Be5 18.Nbc3 Qd6 19.g3 Rd8 20.Qc2 Qd2 21.Qb3 Qd7 22.Rd1 Qe8 23.Rd8 Qd8 24.Qc4 h6 25.Kg2 Bc3 26.Nc3 Qe7 27.h3 b6 28.Qa4 Kh7 29.g4 g6 30.Qd4 Qe6 31.Qd8 Qe5 32.Qd2 h5 33.gh5 Nh5 34.Nd5 Nf6 35.Nf4 Qd6 36.Qc2 Qe5 37.h4 Nh5 38.Nh5 gh5 39.Qc4 Kg7 40.Qc6 f5 41.Qd7 Kg6 42.Qc8 Qg7 43.Qe6 Kh7 44.Kh2 Qg4 45.Qf7 Qg7 0–1. brother – bororo75 (1755), kurnik, 2013.

5.c5 c6 6.Nf3 e4 7.Nd4 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Ne5 11.Nc3 Bg4 12.Qb3 Nd3 (better is 12...b6!? 13.cb6 Qb6+=) 13.Bd3+= ed3 14.f3 Bh5 15.0–0 Be7 16.e4 0–0 17.ed5 Nd5 18.Nd5 Qd5 19.Qd5 (worse is 19.Qd3 Bg6 20.Qe3 Re8+/–) 19...cd5 20.Nf5 Bf6 (better is 20...Bg5 21.Bg7 Ra8+–) 21.Bf6 gf6 22.Ne7 Kg7 23.Nd5 Rd8 24.Ne3 Bg6 25.Rc1 Rd4 26.Rc4 Rd8 27.b5 White intends c6 27...Kf8 28.c6 bc6 29.Rc6 Ke7 30.b6 Rb8 31.Nd5 Kd7 32.Rf6 Rb7 33.h4 h5 34.Kf2 Rb8 35.Ke3 Re8 36.Kd4 Kc8 37.Nf4 Rd8 38.Kc5 Kb7 39.Ng6 fg6 40.Rg6 Rc8 41.Kb5 (better is 41.Kd4 Rd8 42.Ke4 Re8 43.Kd3 Rd8 44.Ke3 Re8 45.Kf4 Rd8+–) 41...Rc2 42.Rg7 Kb8 43.g4 Rd2 44.Kc4 hg4 45.fg4 Rd1 46.Kc3 Rb1 47.Kd3 Rb6 48.h5 Rh6 49.Ke4 Kc8 50.Kf5 Kd8 51.Rg6 (better is 51.Kg5 Rb6 52.h6 Rb5 53.Kg6 Rb6 54.Kh5+–) 51...Rh7 (51...Rh8 52.h6 Ke8 53.g5+–) 52.Kf6 (better is 52.Rg8 Ke7 53.Kg6 Rf7+–) 52...Ke8 (52...Rh8+–) 53.Rg8 Kd7 54.Rg7 Rg7 55.Kg7 Ke7 56.h6 1–0. combijack (1765) – alibekof (1655), gameknot.com, 2009.

5.cd5 Bb4 6.Be5 0–0 7.Bb2 Nd5 8.Nf3 Re8 9.Be2 Qe7 10.0–0 N7f6 11.Ne5 Bf5 12.Bc4 c6 13.Qf3 g6 (13...Be4 14.Qg3=) 14.d4= Rad8 15.a3 Ba5 16.Rc1 Ne4 17.Bd3 Ng5 18.Qe2 Bd3 19.Nd3 Ne4 20.a4 Qh4 21.Ra3 f6 22.Rb3 Rd7 23.Ba3 Rf7 24.h3 Ng5 25.Qg4 Qh6 26.Qe2 Re4 27.Qf1 Bc7 (27...Re8 28.Rc2=) 28.Re1 (better is 28.Rb7!? Bh2 29.Kh2 Rb7 30.Nc5+–) 28...Rg4 29.Kh1 (29.Rb7?? Nh3 30.Kh1 Ng5 31.Kg1 Qh2) 29...Rh4 30.Nf4 Kg7 31.Nd2 (31.g3 Nf4 (worse is 31...Bf4 32.gh4 Nf3 33.ef4 Ne1 34.Qe1+/–) 32.gh4 Nfh3–+) 31...Nf4 32.ef4 Bf4 33.Nc4 Qh5 34.a5 Bc7 35.Bc5 Ne4 36.Ba7 Qd5 Attacks the isolani on a5 37.Qe2 c5 38.Rd1 Ng5 39.Kg1 Rd4 40.Rd4 cd4 41.Bb6 Bb6 42.ab6 Ne4 43.Ra3 Rd7 44.Nd2 Nd2 45.Qd2 d3 46.Ra1 Qd4 47.Rc1 Qb6 48.h4 Qd4 49.h5 gh5 50.Re1 b5 0–1. Wantoch_Rekowski,Jacek (2305) – Kubicki,Tadeusz (2310), Roman Kaminski Memorial Poland, 2006.

5.cd5 Bb4 6.Be5 0–0 7.Bc3 Nd5 8.Bb4 Nb4 9.d4 =+.

5.cd5 Nd5 6.a3 a5 7.Bc4 (7.b5 Bd6=+) 7...N5b6 (7...N7b6 8.ba5 Nc4 9.Qa4 c6 10.Qc4–/+) 8.Bb3=+ ab4 9.ab4 Ra1 10.Ba1 Bb4 (10...Qf6–/+) 11.Nc3 (11.Bf7!? Kf7 12.Qb3 Ke8 13.Qb4=+) 11...0–0 (11...Nc5 12.Bc2–/+) 12.Nf3 (12.Ne4 Nf6 13.Nf6 Qf6–/+) 12...Qe7 (12...Bc3 13.dc3 e4 14.Nd4–/+) 13.0–0 (13.Ne4 Kh8–/+) 13...Nc5 (13...e4 14.Nd4 Nf6–/+) 14.Re1 (better is 14.Bc2!? e4 15.Nd4–/+) 14...Nb3 (14...Bg4 15.Bc2 e4 16.h3–+) 15.Qb3 Be6 (15...e4 16.Nd4–+) 16.Qb2 (16.Qb1 f6–/+) 16...Nc4 (16...f6 17.Rb1 Ra8 18.Qc2–+) 17.Qc2 g6 (17...f6 18.Rd1–+) 18.d3 (better is 18.d4–/+) 18...Nb6 (18...Na3 19.Qe2–/+) 19.Rb1 (19.Ne5 Ra8 20.Bb2 Ra5=) 19...Bc3 (19...f6 20.d4–/+) 20.Qc3 (better is 20.Bc3!? Nd5 21.Ne5= (< 21.Rb7 Qc5 22.Rb3 Ne3 23.fe3 Qe3 24.Kh1 Bb3 25.Qb3 Qd3–/+)) 20...f6=+ 21.d4 e4–/+ 22.Nh4? Nd5 23.Qc2 c6?? 24.Qe4= Nc3?? 25.Qd3 Nb1–+ (Black gets in control) 26.Qb1 Bd5 27.Qd3 Qe4 28.Qe4 Be4 29.f3 Bd3 30.g4 Ra8 31.Bc3 Ra2 32.Ng2 b5 33.Nf4 Bc4 34.e4 Rc2 35.Be1 Rb2 36.d5 cd5 37.ed5 b4 38.d6 Bb5 39.Nd5–/+ Kf7 40.Nc7?? b3 41.Nb5–/+ Rb1 42.Kf2 b2 43.Nc3?? Ra1 44.Bd2 b1Q?? 45.Nb1=+ Rb1 46.d7? Ke7–+ 47.f4 Kd7 48.g5 fg5 49.fg5 Rb2 50.Ke3 Ke6 51.h4?? Kf5 52.Ba5 Rb3 (53.Kd4 Rh3–+) 0–1. tambor17 – boneheadplay19, Live Game Caissa's Web, 2005.

5.cd5 Nd5 6.a3 Bd6 7.Bc4 N5b6 8.Bb3 0–0 9.Nf3? (9.d4 a5=+) 9...c5 (better is 9...e4!? 10.Ng1 Ne5 11.Be5 Be5–+) 10.bc5 Nc5 11.Ba2?? (better is 11.d3–/+) 11...e4 12.Nd4 (12.0–0 Bg4 13.h3 ef3 14.Bd4–+) 12...Be5 (better is 12...Nd3 13.Kf1 Nb2–+) 13.0–0 Nd3 14.Bc3 Bd7 15.a4 a5 16.Bb3 Qc7 17.Bc2 (17.f4 Bf6–/+) 17...Nc5 (17...Bh2!? 18.Kh1 Bd6–+) 18.h3 Kh8 19.Kh1 Qc8 (19...Nd5 20.Qh5 f5 21.f4–/+) 20.Qh5 Bf6 (20...f5!?–/+) 21.Ne2 Nd3 (21...Qc6 22.f3 Nba4 23.Ra4=) 22.Bf6 gf6 (22...Qc2 23.Nbc3 Bc6 24.Nd4+–) 23.Qh4 (23.Nbc3 Qc5 24.Qh4 Qg5 25.Qe4 Bc6+/–) 23...Rg8 (better is 23...Qc2 24.Qf6 Kg8 25.Qb6 Qc6 (25...Ba4? 26.Nbc3 Qb3 27.Na4 Qb6 28.Nb6+–) 26.Qc6 Bc6+=) 24.Qf6 Rg7 25.Bd3 ed3 26.Nf4 (better is 26.Ng3 Qc6 27.Qd4 Bh3 28.e4+=) 26...Bf5?? (26...Nd5 27.Qd6 Nf4 28.Qf4 Bh3–+) 27.Nh5+– Qg8 28.Ng7 (better is 28.Qf5 Rg6 29.Nc3+–) 28...Qg7 29.Qg7 Kg7 30.Nc3 Nd7 (30...Nc4 31.Ra2 Rc8+–) 31.Rab1 b6 32.Rb5 Be6 33.f4 f5 34.e4 fe4 35.Ne4 Bc4 36.Rg5 Kh8 37.Nd6 (37...Bb3 38.Ra1+–) 1–0. revbodio1 – Bennyhill, Live Game Caissa's Web, 2004.

5.cd5 Nd5 6.Qb3 Nb4!? 7.d4 ed4 8.Bd4 Nc5 9.Bc5 Bc5 –/+.

5.cd5 Nd5 6.Qb3 N5f6 7.Bc4 Qe7 8.Nf3 g6?? (better is 8...c6=+) 9.Ng5+– Bg7 10.Bf7 Kf8 11.Ne6 Kf7 12.Nc7 Kf8 13.Na8 Nb6 (13...Qd6 14.Qc3 Qc6 15.0–0+–) 14.Nb6 ab6 15.d4 Be6 16.Qa4 Kf7 17.de5 Ng4 18.0–0 Rf8 (18...Rd8 19.b5 Ne5 20.Bd4+–) 19.Nd2 Ne5 20.Qc2 Ng4 (20...Kg8 21.a4+–) 21.Bg7 Kg7 22.Nf3 (22.a3 Kg8+–) 22...Nf6 (22...Rf3 23.gf3 Nh2 24.Qc3 (24.Kh2?! Qh4 25.Kg1 Qg5 26.Kh1 Qh4 27.Kg1 Qg5 28.Kh2 Qh4 29.Kg1=) 24...Kg8 25.Rfd1 (25.Kh2?! Qh4 26.Kg1 Qg5 27.Kh1 Qh5 28.Kg2 Qg5 29.Kh2 Qh4 30.Kg1 Qg5 31.Kh2 Qh4=) 25...Nf3 26.Kf1+–) 23.Nd4 Bd5 24.Rac1 Qe5 (24...Qb4 25.a4+–) 25.Qc7 Kg8 (25...Qc7 26.Rc7 Rf7 27.Rf7 Kf7+–) 1–0. radica – chaaaarge, Live Game Caissa's Web, 2004.

4.c4 e6

5.a3 c5 6.Qb3 (6.bc5 Bc5 7.d4 Be7=) 6...b6 (6...Qb6 7.Nf3=+) 7.d4 (7.Nf3 Bb7=) 7...Qc7 (7...Bd6 8.Nf3=+) 8.Nf3 Bb7 9.Nc3 Bd6 (9...cd4 10.Nb5 Qd8 11.Nbd4= (< 11.Bd4 a6–/+)) 10.h3 (10.Nb5 Qb8+=) 10...0–0 (10...a6!?=) 11.Nb5+= Qb8 12.Be2 (12.Nd6 Qd6 13.dc5 bc5 14.Bf6 Nf6 15.bc5 Qc7=) 12...Bc6 (12...cd4 13.Nbd4 a6 14.Rd1=) 13.Nd6 Qd6 14.Ne5 (14.dc5 bc5 15.Qc3 cb4 16.ab4 dc4 17.Qc4 Rfb8 18.Bf6 Nf6=+) 14...dc4= 15.Nc4 Qc7 16.Rg1 (16.0–0!?=) 16...Bd5 (16...Qh2 17.Kf1–/+) 17.Qd3 (17.bc5 Qh2 18.0–0–0 bc5 19.dc5 Rfc8–/+) 17...Rfd8 (17...Qh2 18.Kf1–/+) 18.Nd2 (18.dc5 bc5 19.g3 cb4 20.ab4 Rab8–/+) 18...Qb7 (18...Qh2 19.Kf1–/+) 19.Bf3 (19.dc5 bc5 20.Qb5 Qc7=+) 19...Bf3 20.Nf3 (20.gf3 e5=+) 20...cb4 (20...Rac8 21.Qe2–/+) 21.ab4=+ Rac8 22.Ke2 Nd5 23.Qb3 Rc7 24.Rgc1= Rdc8 25.Kf1 N5f6 26.Nd2 Qd5 27.Qd1 Qb5=+ 28.Kg1 Rc1 29.Bc1 Rc7 30.Rb1 Nd5–/+ 31.Qf1 Qf1 32.Kf1 Nb4! 33.Rb4 Rc1 34.Ke2 Rc7 35.Ne4 Kf8 36.Nd6 Rc2–+ 37.Kf3 Ra2 38.Rc4 a5 39.Nb5 Ke7–/+ 40.Rc7 Rb2 41.Na3 Kd6 42.Ra7 Kc6 43.Nc4–/+ Rb4 44.Na5? ba5–+ 45.Ra5 Nf6 46.Ra7 Rb7 47.Ra6 Kb5 48.Ra1 Nd5 49.Rb1 Kc6 50.Rc1 Kb5?? 51.Rb1 Nb4 52.Ra1 Rc7 53.Ra8 g6 54.Rb8 Ka4 55.Ra8 Kb3 56.Rb8 Kc3 57.Ra8 Kd2 58.Ra4 Nd5 59.Ra2 Rc2 60.Ra7 Rc7?? 61.Rb7?? Kd3 62.Rb3 Rc3 63.Rb7 Rc1 ½–½. Dessing,Bastiaan – Langerak,Wouter, NED–ch U14 Rijswijk, 2000.

5.a3 Be7 6.Nf3 0–0 7.Qc2 c5 8.b5 Qc7 9.d3 b6 10.Nbd2 Bb7 11.Be2 Rad8 12.Rc1 Qb8 13.Ba1 Ne8 14.Nb3 Bf6 15.d4 cd4 16.Bd4 e5 17.Bc3 dc4 18.Bc4 Nd6 19.Bb4 Rfe8 20.0–0 Nc4 21.Qc4 Qa8 22.Qg4 Bd5 23.Nbd2 Nf8 24.Ng5 Bg5 25.Qg5 h6 26.Qg3 Ng6 27.Nc4 Bc4 28.Rc4 Qd5 29.Rc7 Rd7 30.Rd7 Qd7 31.a4 Rc8 32.Qf3 Rc4 33.Rb1 e4 34.Qe2 Ne5 35.Rd1 Nd3 36.Be1 Ra4 37.Qc2 Qb5 38.Qc8 Kh7 0–1. Coquelle,Arnaud – Dehesdin,Wilfried (2090), La Fere, 2002.

5.b5 dc4 6.Bc4 Nb6 7.Be2 Bd7 (7...Bd6 8.Bf6 Qf6 9.d4=+) 8.Nf3 Be7 (8...c6 9.bc6 Bc6 10.0–0=+) 9.0–0 0–0 10.Nc3 c6 11.a4 cb5 12.ab5 Nbd5 (12...Bd6 13.d4=) 13.Ne5 Qe8 14.Qb3 Nc3 15.Bc3 Ne4 16.Nd7 Qd7 17.d4 Nc3 18.Qc3 Rfc8 19.Qb2 Bd8 (19...Bd6 20.Rfc1=) ½–½. Myslowski,Karol – Vacca,Georges, FRA–ch op Veterans, 1994.

5.c5 Be7 6.Nf3 0–0 7.Be2 c6 8.0–0 b6 9.d4 a5 10.a3 Rb8 11.Qc2 Qc7 12.Nbd2+= bc5 13.bc5 e5 14.Ne5 Ne5 15.de5 Nd7 16.Nb3?? Qb7–/+ 17.Bd3 Qb3–+ 18.Bh7 Kh8 (18...Kh8 19.Rfb1 Bc5–+) 0–1. Torres Herrero,F – Ortega Lozano,MA, Valladolid, 1987.

5.c5 Be7 6.Nf3 0–0 7.Be2 Re8 8.d4 Nf8 9.Nbd2 Bd7 10.Ne5 Ng6 11.Ndf3 Ne4 12.Ng6 hg6 13.h4 (13.Ne5!?+/–) 13...a5 14.b5 Bf6 (14...a4 15.Qc2=) 15.Qc2+/– b6 (15...a4 16.h5 a3 17.Bc1 gh5 18.Rh5+=) 16.c6 Bc8 17.a4 Be7 18.0–0–0?? (better is 18.Bd3+/–) 18...Nf2–/+ 19.Rdf1 Nh1 20.Rh1 e5 (20...Bd6 21.h5–/+) 21.de5 Bf5 22.Bd3 Bd3 23.Qd3 Bc5 24.h5 Re6 (24...gh5 25.Rh5 g6+/–) 25.h6 (better is 25.hg6!? fg6 26.Kb1+=) 25...gh6–/+ 26.Rh6 (26...Qe7 27.Kc2–/+) 1–0. Gross,Wilhelm – Merten,Rainer, xiii/15, 1986.

5.c5 Be7 6.f4 0–0 7.Nf3 c6 (7...a5 8.a3=+) 8.Qc2 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 b6 12.d4 (12.Bd4 bc5 13.bc5 Ne4=+) 12...Ne4–/+ 13.Bd3 f5 (13...Ndf6 14.Nc3 Nc3 15.Bc3=) 14.0–0= Bb7 (14...Qc7 15.Nc3=) 15.Bc3 Qa8 (15...Qc7 16.Nbd2=) 16.Nbd2 (16.cb6 Nb6 17.Ne5 Qa4=) 16...Ba6 17.Ra1 Bd3 18.Qd3 Qb7 19.Ne5 Ne5 20.fe5 b5 (20...Qc7 21.Ra6=) 21.Ne4 (21.Rf1 Rf7=) 21...fe4 22.Qe2 Bg5 23.Bd2 Qf7 24.Ra6 Qb7 25.Ra3 (25.Ra1 Qc7=) 25...h6 (25...Bh4 26.Be1 Bd8 27.Qg4=) 26.Be1 Ra8 (26...Qf7 27.Ra6=) 27.Ra8 Qa8 28.h4 (28.Bc3 Qb7=) 28...Be7 29.Qg4 Qc8 30.Qg6 Qd7 31.Bg3 Bd8 32.Kh2 (32.h5 Be7+=) 32...Qf7 33.h5 (33.Qf7 Kf7 34.Kh3 g6=) 33...Bg5 (33...Qg6 34.hg6 Bg5 35.Bf2=+) 34.Qf7= Kf7 35.Bf2 ½–½. Soukup,Alois – Friml,Antonin, Klatovy op–A, 1994.

5.cd5 Bb4 6.de6 fe6 =.

5.cd5 ed5 6.a3 Bd6 7.Nc3 0–0 8.Nf3 c6 (8...a5 9.b5=) 9.d4 (9.Be2 Nb6=+) 9...Nb6=+ 10.Qc2 g6 (10...Re8 11.Bd3=+) 11.Be2 Bf5 12.Qd2 (12.Qb3 Re8=) 12...Qc7 (12...Ne4 13.Ne4 Be4 14.0–0=) 13.h3 Be4 (13...Nc4 14.Bc4 dc4 15.Rc1=+) 14.Rc1 (14.Ne4 Ne4 15.Qc2 Rae8=) 14...Bf3=+ 15.Bf3 (15.gf3 Qe7=+) 15...Nc4–/+ 16.Qc2 Rfe8 (16...a5 17.Be2–/+) 17.0–0 Re6 (17...a5 18.b5=+) 18.e4 (better is 18.Be2!?=) 18...de4–/+ (18...Nb2 19.ed5 cd5 20.Qb2+/–) 19.Ne4 Ne4 (19...Nb2?! 20.Nf6 Rf6 21.Qb2=) 20.Be4 Nb2 21.Bd5?? (21.Bf3 Rae8=+) 21...Rf6 (better is 21...cd5 22.Qc7 Bc7 23.Rc7 b6–+) 22.Qb2=+ Bf4 23.Rc2 Qd6 24.Bf3 Re8 25.Rd1 Bh6 26.d5 cd5 27.Bd5+= Qb6 28.a4 Bg7 29.Qb3 Kf8 30.b5 a6 31.Qb4 Kg8 32.Qc4 ab5 33.ab5 Bf8 34.h4 h5 35.Rb1 Bd6= 36.Qc3 Be5 37.Qb3 Kg7 38.Kf1 Bd4=+ 39.Rd1? Bf2–+ 40.Bf3 Bh4 41.Rd7 Re1 0–1. wlittle (2235) – mic (2235), net–chess.com, 2004.

5.cd5 ed5 6.a3 Be7 7.Nc3 0–0 8.Nf3 c6 (8...a5 9.b5=) 9.Be2= Qc7 10.0–0 Re8 11.Rc1 Qd8 12.h3 Nb6 13.d3 Be6 14.Nd4 Bd7 15.Nf3 (15.Nb3 Bd6=) 15...Rc8 (15...a5 16.ba5 Ra5 17.Qb3=) 16.Ne5 Be6 17.f4 d4 (17...Nbd7 18.Na4=) 18.ed4 (18.f5 Bd7 A) worse is 19.Nd7 dc3 20.Nb6 A1) worse is 20...cb2 21.Nc8 bc1Q 22.Ne7 (22.Qc1? Qc8 23.d4 Qd8–+) 22...Qe7 23.Qc1+=; A2) 20...Qb6 21.Bc3 Qe3 22.Kh1 Nd5–/+; B) 19.Qb3=) 18...Qd4+= 19.Kh1 Nbd5?? (19...Nbd7 20.Nc4 Bc4 21.dc4=) 20.Qd2?? (better is 20.Na4 Nc3 21.Bc3+–) 20...Nc3 21.Bc3 Qd5 (21...Qd6 22.Bf3+=) 22.f5= Bd7 23.Bf3 Qd6 24.Qg5?? (24.Rce1 Bd8 25.Nc4+=) 24...Nd5?? (better is 24...Ne4! 25.Qg4 Bf5 26.Nf7 Ng3 (26...Bg4?! 27.Nd6 Ng3 28.Kg1 Bd6 29.Bg4+=) 27.Kg1 Qg6 (27...Bg4?! 28.Nd6 Bd6 29.Bg4+=; worse is 27...Kf7 28.Qg7 Ke6 29.Bg4+=) 28.Qg6 Bg6–+) 25.Nf7+= Bg5 (25...Nc3? 26.Nd6 Bg5 27.Rc3+–) 26.Nd6 Bc1 27.Rc1 (27.Bd5 cd5 28.Rc1 d4=) 27...Nc3 28.Rc3 Re1 29.Kh2 Rb8 30.Be4 (30.d4 Kf8 31.Rc5 Re3=) 30...h6 (30...Kf8 31.b5 cb5 32.Rc7+=) 31.Rc2 (31.Kg3 Kf8=) 31...Kf8+= 32.g4 Ke7 33.Nc4 Kf6 (33...Be8 34.Kg3=) 34.Rg2 (34.Kg2 Be8=) 34...b5 (34...Be8 35.Rg1 Rg1 36.Kg1+=) 35.Nd2 (better is 35.Na5!?=) 35...Ra1–/+ 36.Nf3 (36.Nb3 Ra3 37.Nc5 Be8–/+) 36...Ra3 37.g5 (37.d4!? Rb3 38.Ra2 Rb4 39.Ra7–/+) 37...hg5–+ 38.Ng5 (38.Rg5 Be8–+) 38...Bf5 0–1. zabazaba (1635) – lazermuti (1615), gameknot.com, 2014.

5.Nf3 Bb4–/+ 6.h3 (6.cd5 ed5 7.Nc3 c6–/+) 6...0–0 7.g4 (7.cd5 ed5 8.Be2 Re8–/+) 7...c6 (7...dc4 8.Bc4 Nb6 9.Be2–+) 8.g5 (8.Qc2 Bd6–+) 8...Ne4 9.h4 (9.Rg1 Be7–+) 9...Qe7 (9...Re8 10.Qc2 e5 11.cd5 cd5 12.Bd3–/+) 10.Qc2 (10.a3 Ba5–+) 10...Bd6 (10...e5 11.cd5 cd5 12.a3–/+) 11.d3–/+ Bb4 (11...Nec5 12.d4 Ne4 13.Nc3–/+) 12.Kd1 (12.Ke2 Nd6 13.cd5 ed5 14.Bg7 Kg7 15.Qb2 Kg8 16.Qb4 Re8=) 12...Nd6 (12...Nec5–/+) 13.Rg1 (13.Bg7 Kg7 14.Qb2 e5 15.Qb4 dc4 16.dc4 e4=+) 13...e5 (13...c5!?–/+) 14.cd5=+ cd5 15.Qb3 Ne8 16.Qd5 (16.Nc3 Bc3 17.Qc3 Nd6=+) 16...Nc7 (16...Bd6 17.h5–/+) 17.Qe4 (17.Qc4 Bd6=+) 17...Bd6–/+ 18.d4 (18.h5–/+) 18...ed4 (18...f5 19.Qc2–/+) 19.Qd4 (better is 19.Qe7!? Be7 20.Nd4=) 19...Ne6–/+ 20.Qg4 (20.Qd5–/+) 20...Nec5 (20...Ndc5!? 21.Qh5 Ne4–/+) 21.Qd4=+ Ne6 (21...f6=+) 22.Qg4–/+ Rd8 (22...Ndc5 23.h5 Bd7–/+) 23.Kc2 (23.Nbd2–/+) 23...Ne5?? (23...Nb6 24.Qe4 Qc7 25.Nc3 Nc5–+) 24.Ne5= Be5 (better is 24...Qc7!? 25.Qc4 Be5 26.Qc7 Bc7=) 25.Be5+/– Nd4 26.Bd4?? Bg4–/+ 27.Rg4 Qd7 28.Rf4–+ Qa4 29.Kd2 Qb4 30.Kc2 Rd4! (31.Rd4 Rc8 32.Bc4 Rc4 33.Rc4 Qc4 34.Nc3 Qh4–+) 0–1. Caminade,Christian – Boutteville,Cesar, FRA–ch Dieppe, 1967.

5.c5 c6

6.d4 Rb8 =.

6.Nf3 a5 7.a3 Be7 (7...b6 8.b5=) 8.d4 0–0 (8...b6 9.Ne5 Ne5 10.de5=+) 9.Bd3 (9.b5 e5=) 9...ab4 (9...b6 10.Ne5 Ne5 11.de5=) 10.ab4 Ra1 11.Ba1 Ne4 (11...b6 12.0–0=) 12.0–0 f5 13.Nbd2 (13.Qc2 b6=) 13...Rf6 (13...b5 14.Bb2+=) 14.b5 (14.Ne5 Qc7+=) 14...Nf8 (14...Rf7 15.Bb2+=) 15.Ne5+/– Bd7 (15...cb5 16.Bb5 Nd7 17.Ndf3+=) 16.bc6 (16.b6 Ng6 17.Ndf3 Be8+/–) 16...bc6 (16...Bc6 17.Ndf3+/–) 17.f3 (17.Ndf3 Qc7+/–) 17...Nd2 18.Qd2 Be8 19.e4 (19.Bc3!?+/–) 19...fe4 20.fe4 Rf1 21.Kf1 Bg5 (21...de4 22.Be4 Bc5 23.Bc3=) 22.Qf2+= Qa5 23.Bb2 Qa4 24.ed5 ed5 25.Bc3 Qd1 26.Be1 Qh5 27.Qf5+= g6 28.Qc8+/– Qh2? 29.Qe8+– Qh1 30.Kf2 Bh4 31.Kf3 Qe1 32.Qf7 (32...Kh8 33.Qf8#) 1–0. Wall,Bill – Breezy, Internet, 2005.

6.Nf3 b6 7.Qa4 Rb8 +=.

6.Nf3 Qc7 7.d4 (7.Bf6 gf6 8.d4 b6+=) 7...Be7 8.Nc3 (8.Nbd2 b6=) 8...0–0 (8...b6 9.Rc1=) 9.a4 (9.h3 e5=) 9...Re8 (9...b6 10.cb6 Qb6 11.b5=) 10.Qb3 (10.a5 h6=) 10...e5 (10...b6 11.Qc2=) 11.de5 Ne5 12.Ne5 Qe5 13.Ne2 Qg5 14.Nd4 A comfortable square for the white knight (14.a5 Bd8 15.Bd4 Ng4=) 14...Ne4 15.Qc2? (15.a5 Qh4 16.g3 Qh6+=) 15...Bd7?? Black loses the upper hand (15...a5 16.Bd3 Bd8 17.Ne2 ab4 18.Be4 Re4 19.0–0–+) 16.g3? (16.Nf3 Qf5 17.Nd4 Qg6+=) 16...Qh6 (better is 16...a5!? 17.h4 Qh6–+) 17.Bg2–/+ Rac8 (17...a5 18.Qb3+=) 18.a5 White gets more space 18...Bh3 Black threatens to win material: Bh3xg2 19.0–0 a6 Secures b5 20.Rae1 (20.Bh3 Qh3 21.f3 Ng5=) 20...Bf6 21.f3 White threatens to win material: f3xe4 21...Ng5 22.Bc1 Bg2 23.Qg2 Qg6 24.Qd2 Re7 25.g4 Bd4 26.ed4 Ne6 27.Re5 Rce8 28.Rfe1 Kf8 29.Qe3?? f6–+ 30.Re6 Re6 31.Qe6 Re6 32.Re6 Kf7 33.Re1 Qd3 34.Be3 Qc3 35.Kf2 Qb4 36.h4 Qa5 37.h5 Qa2 38.Re2 Qb1 39.Bf4 h6 40.Bd6 a5 41.Re7 Kg8 42.Re8 Kh7 43.Rc8 Qb2 44.Ke3 Qc1 45.Kd3 Qc4 46.Ke3 Qc3 47.Kf4 Qd4 48.Kf5 Qe3 49.Rc7 Qf3 50.Ke6 Qg4 51.Ke7 Qh5 52.Kf8 Kg6 53.Rg7 Kf5 54.Rb7 d4 55.Rd7 Qe2 56.Bc7 d3 57.Ba5 h5 58.Rd6 Qe4 59.Bc3 h4 60.Rf6 Kg5 61.Rf7 h3 62.Bd2 Kg4 63.Rf2 Qf3! Black should return some of the goodies he has collected 64.Rf3 Kf3 65.Ke7 h2 66.Kd6 h1Q 67.Kc6 Ke2 68.Kd7 Qd5 (68...Qd5 69.Kc7 Kd2 70.c6 Ke3 71.Kb6 d2 72.c7 d1Q 73.c8Q Q1d4 74.Ka6 Qa1 75.Kb6 Qaa5; 68...Kd2 69.c6 Ke3 70.c7 Qb7 71.Ke6 Qc7 72.Kf5 d2 73.Kf6 d1Q 74.Ke6 Qg7 75.Kf5 Qdg4) 0–1. Kalanyos,Ferenc – Fekete,Lajos (2015), HUN–chT2 Asztalos, 2003.

6.f4 Be7 7.Nf3 0–0 8.Be2 Ne4 (8...a5 9.Qa4=+) 9.g3 (9.d3 Bh4 10.g3=+) 9...Bf6 10.Ne5 Be5 11.fe5 f5 (11...b6 12.d3 Ng5 13.h4 bc5 14.bc5+– (< 14.hg5 Qg5 15.Qc2 cb4+=)) 12.d3+= Ng5 13.Nd2 b6 14.Nb3 (14.d4 bc5 15.bc5 Rb8+=) 14...bc5 15.bc5 Qc7 16.h4 Nf7 17.d4 g5? (17...a5!?=) 18.Rb1 (18.hg5 Ng5 19.g4 fg4 20.Bg4 Rb8+/–) 18...g4 19.Bc3 Nb8 20.Na5 Na6 (20...Kg7 21.0–0+/–) 21.Kf2 (21.Qa4 Rb8 22.Nb3 Qb7+/–) 21...Rb8 22.Qa4 Rb1 23.Rb1 Nb8 24.Qb3 (24.Nb7 Bb7 25.Qa7 Qc8 26.Rb7 Qd8+–) 24...Na6 25.Nb7 Bb7 26.Qb7 Qb7 27.Rb7 Nb8 28.Ra7 Re8 (28...Nd8 29.a4 Rf7 30.Ra8+–) 29.a4 Kf8 30.Rb7 Rc8 31.a5 (31...h6 32.a6+–) 1–0. Furlong,Kevin – Heslop,Anthony G, Oxford op, 1998.

4.d4 e6

5.a3 Nb6 6.Nc3 Bd7 7.Nf3 Bd6 8.Bd3 0–0 9.0–0 a5 10.ba5 Ra5 11.Qd2 Ra7 12.Nb5 Bb5 13.Bb5 Qe7 14.Qc3 Ne4 15.Qb3 Rfa8 16.Bd3 Nf6 17.Rfc1 Ba3 18.Ba3 Ra3 19.Qb2 g6 20.Ra3 Qa3 21.Qb1 Nfd7 22.Nd2 Qc3 23.Nb3 Kf8 24.Kf1 Nc4 25.Ke2 b6 26.Rd1 Nf6 27.f3 h6 28.g4 Ra3 29.h4 Nb2 30.Rd2 Nc4?? 31.Rd1 Ne8 32.Qc1 Ra4 33.Qb1 Ned6 34.Kf2 Qb2 35.Ke2 Qb1 36.Rb1 Nb5 37.Ra1 Ra1 38.Bc4 Nc3 39.Kd2 Rd1 40.Kc3 dc4 41.Kc4 c6 42.e4 Rh1 0–1. Savrda,J – Dvorak,Tomas (2115), Klatovy op–B, 1999.

5.a3 Bd6 =+.

5.a3 Be7 6.c4 0–0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.d4 Nbd7 7.c4).

5.a3 Be7 6.Nf3 0–0 7.Bd3 b6 (7...a5 8.b5=) 8.Nbd2 (8.Ne5 Bd6=) 8...c5 9.bc5 bc5 10.dc5 (10.c4 Rb8 11.Qc2 cd4 12.Bd4 Qc7 13.cd5 Qc2 14.Bc2 Nd5 15.Ba7 Ra8+=) 10...Bc5 (10...Rb8 11.Rb1=) 11.c4 Ba6 12.0–0 Nb6 (12...Qe7=) 13.Qc1 (13.Ne5!?=) 13...Rc8=+ 14.Qc2 (14.Bf6 Qf6 15.Qb1 Rfd8=+) 14...dc4 (14...Bc4 15.Nc4 dc4 16.Be2–/+) 15.Nc4 (15.Be2 Nfd5=+) 15...Bc4–/+ 16.Bc4 Nc4 (16...Be3 17.fe3 Nc4 18.Bf6 Qf6 19.Rac1–/+) 17.Qc4 Ba3 18.Qe2 Bb2 19.Qb2 Ra8 (19...Qe7 20.Rfd1–/+) 20.Rfd1 (20.Ra6 Qe7=+) 20...Qe7 (20...Qc7 21.Rdc1 Qd6 22.Rd1–/+) 21.Qb5 (21.Ne5 Rfc8=+) 21...Rfb8–/+ 22.Qg5 h6 23.Qh4 a5 24.e4 Qb4 25.Re1 a4 26.h3 a3–+ 27.Reb1?? Qb1 28.Rb1 Rb1 29.Kh2 a2 30.e5 Nd5 31.Nd2 a1Q (32.Nb1 Qb1–+) 0–1. PawnPower – tyler_durdan, internet, 2006.

5.b5 Bb4 6.Bc3 Bd6 7.Nf3 =+.

5.b5 c6 6.c4 (6.bc6 bc6 7.Nf3 Rb8=+) 6...dc4 (6...cb5 7.cb5 Bb4 8.Bc3=) 7.Bc4 (7.bc6 Nb6=+) 7...cb5 (7...Nb6 8.Bd3=+) 8.Bb5= a6 9.Be2 Bb4 10.Nd2 Qa5 (10...0–0 11.Ngf3=) 11.Ngf3 0–0 12.0–0 b5 (12...Rd8 13.a3 Be7 14.Nc4=) 13.a3 (13.a4 ba4 14.Ra4 Qb6+=) 13...Be7= 14.Qb3 (14.Rc1 Rd8=) 14...Bb7 15.Rfd1 (15.Bc3 Qd8=) 15...Rac8=+ 16.Rac1 Rc1 (16...Rfd8 17.Qd3=+) 17.Bc1 (17.Rc1 Nb6=) 17...Nb6 (17...Rc8 18.Bd3=+) 18.Bb2 (18.Ne5 Bd5 19.Qd3 Rc8=) 18...Nbd5 (18...Bd5 19.Qd3=+) 19.e4 (19.Rc1 Rd8=) 19...Nc7 (19...Nf4 20.Bd3 Rc8=+) 20.Ng5 (better is 20.Nc4 bc4 21.Qb7+=) 20...h6–/+ 21.Nh3 (21.e5 Bd5 22.Qe3 hg5 23.ef6 Bf6=+) 21...Ne4 22.Nf4?? (better is 22.Nc4 bc4 23.Qb7–/+) 22...Nd2–+ 23.Bc3 Qa3 24.Qa3 Ba3 25.Bd2 Bd6 26.Bf3 Bf3 27.gf3 Ne8 28.Nd3 Nf6 29.Bb4 Bb4 30.Nb4 Nd5 31.Na6 Ra8 32.Nc5 Ra2 33.Rb1 Nf4 34.h4 Ne2 35.Kg2 Nd4 36.Kg3 Nf5 37.Kf4 Nh4 38.Kg3 (38...Nf5 39.Kf4–+; 38.Rb5 g5 39.Ke3 Nf5 40.Kd3 Rf2 41.Ke4–+). toll (1665) – A6648, ICC, 2003.

4.Be2 e5

5.a3 c5 6.bc5 Bc5 7.Nf3 Bd6 8.0–0 Qc7 9.g3 (9.Nh4 Nb6=) 9...Nb6 10.d3 0–0 11.Nbd2 Bh3 12.Re1 Rac8 13.c4 dc4 14.Rc1 Qe7 15.Nc4 Nc4 16.dc4 Rfd8 17.Qb3 Ne4 18.Qc2 Nc5 19.Red1 b6 20.Rd5 f6 21.Nh4 Bb8 22.Rcd1 Be6 23.Nf5 Qe8 24.R5d2 Rd2 25.Rd2 Rd8 26.Rd8 Qd8 27.Nh4 Qd7 28.Bc3 Bc7 29.Bb4 Bd6 30.Bc5 Bc5 31.Bd3 g6 (31...g5 32.Nf5–/+) 32.Qb3 (32.Bg6!? hg6 33.Qg6 Kf8 34.Qf6 Qf7 35.Ng6 Ke8 36.Qh8 Qg8 37.Qh5+=) 32...Qb7 33.Ng2 Bd7 34.Ne1 Bc6 35.Be2 Qa6 The isolani on a3 becomes a target 36.Nc2 Ba4 37.Qb2 Bc2 38.Qc2 Qa3 (worse is 38...Ba3 39.c5 b5 40.Qd3+=) 39.Qd2 Qa4 40.Qd5 Kg7 41.Bf3 a5 (41...Qe8!?–/+) 42.Qb7+= Kh6 43.Bd5 Qe8 44.Bc6 Qf8 45.Qd7 Qe7 46.Qh3 Kg7 47.Qg2 f5 48.g4 f4 49.ef4 ef4 50.Qf3 Qf6 51.Kg2 Qd4 52.Bd5 (better is 52.Qe2–+) 52...a4 53.Qe2 a3 54.Kh3 (54.Kf3–+) 54...Qf2 55.Qf2 Bf2 56.c5 bc5 (56...Bc5!? 57.Kg2–+) 57.Kg2 Be3 58.Kf3 (58.g5 h6 59.h4 h5–+) 58...g5 (58...Kf6!? 59.Ke4–+) 59.Ke4 Kf6 60.Bc4 Kg6 61.h3 h5 62.Bd5 hg4 63.hg4 Kf6 64.Bc4 Ke7 65.Kf5 (65.Bd5–+) 65...f3 66.Ke4 f2 67.Ke3 f1Q! 68.Bf1 a2 69.Bd3 a1Q 0–1. mikebaldini (1725) – dc_chess (1700), gameknot.com, 2014.

5.a3 Bd6 6.Nf3 0–0 7.0–0 Nb6 (better is 7...a5!?+=) 8.Ne5 Re8 9.Ng4 (9.f4 a5 10.b5 Bf5+=) 9...Bg4 10.Bg4 Nc4 11.Bd4 b6 12.Qf3 (12.Be2 c5 13.Bc4 cd4+=) 12...Ne4+= 13.Rd1 c5 14.bc5 bc5 15.Bg7?? (better is 15.Bc3=) 15...Kg7–+ 16.d3 Nb2 (better is 16...Nf2 17.dc4 Nd1 18.Qd1 Qg5–+ (worse is 18...dc4 19.Nd2–+)) 17.de4–/+ Nd1 18.Qd1 de4 (18...Re4?! 19.Bf3 Re8 20.Bd5=) 19.Nd2 Qf6 20.Rb1 Qe5 (20...Rad8 21.h3–/+) 21.g3+= Rab8 22.Rb8 Rb8?? (better is 22...Bb8 23.Bd7 Rd8 24.Qg4 Kf8 25.Ne4 Rd7 26.Qd7 Qe4 27.Qc8 Qe8 28.Qc5 Qe7 29.Qc8 Qe8=) 23.Nc4+– Qf6 24.Qd6 Qa1 (24...Rb1 25.Kg2 Rc1 26.Qd2+–) 25.Kg2 Re8 (25...Rb1 26.Nd2 Rg1 27.Kh3 Rh1+–) 26.Qc5 1–0. mikebaldini – bacho777, gameknot.com, 2013.

4.Nf3 b6

5.b5 Bb7 6.d4 e6 7.Nbd2 Bd6 8.c4 dc4 9.Bc4 Ne4 (9...a6!?=) 10.Ne4+= Be4 11.0–0 Nf6 12.a4 Qe7 (12...0–0 13.Ne5+=) 13.Bd3 Bb7 14.Re1 (14.Ne5 0–0+=) 14...Bb4 15.Rf1 Bd6 16.Qe2 0–0 17.e4 Nh5 18.g3 Rfd8 19.Bc1 Bb4 20.Bg5 f6 21.Be3 g6 22.Rfc1 Rd7 (22...Rac8 23.Bd2+=) 23.e5 Rf8 24.Bh6 (24.ef6 Nf6 25.Ne5 Rd6+/–) 24...Rf7 (24...Rfd8 25.Be4 Be4 26.Qe4+=) 25.Be4 Bd5 (25...Be4!? 26.Qe4 Rd5+=) 26.Bd5+/– Rd5 27.ef6 Qf6 28.Ne5 Ng3? (better is 28...Rd4 29.Nf7 Qf7+–) 29.hg3 g5 (29...Rd4 30.Nf7 Qf7 31.Rc6+–) 30.Nf7 Qf7 31.Rc4 Bd6 32.Re1 e5 (32...Qg6 33.Qe6 Qe6 34.Re6 Kf7 35.Rd6 cd6 36.Rc7 Kg6+–) 33.de5 Re5 34.Re4 (34.Re4 Qe6 35.Re5 Be5 36.Qf3 Qh6 37.Re5+–) 1–0. Krivoshapko,Alexander – Petrenko,Andrey, 2008.

5.Bb5 Bb7 +=.

5.c4 e6 6.a3 c5 7.b5 (7.cd5 ed5 (worse is 7...cb4 8.de6 fe6 9.ab4+/–) 8.Bb5 a6= (worse is 8...cb4 9.Bc6 Rb8 10.Be5+/–)) 7...Bb7 8.Be2 Be7 9.0–0 0–0 10.d4 Ne4 11.Nbd2 Rc8 12.Qa4 (12.Ne4 de4 13.Ne5 Rc7=) 12...Qc7 13.Rac1 (13.Qa7?? Nd2 14.Nd2 Ra8 15.Qa8 Ra8–+) 13...cd4 14.Bd4 (14.Qa7? Ra8 15.cd5 A) 15...Ra7? 16.Rc7 Nef6 17.de6 de3 18.fe3 (18.Rd7?! Nd7 19.ef7 Kf7 20.fe3 Ba3 21.Ba3 Ra3=) 18...fe6 19.Bf6 Bf6 20.Rd7 Bf3 21.Ra7 Be2 22.Rf2 Bb5 23.Ne4+–; B) 15...Nc3 16.Qa8 Ra8–+; 14.ed4?! Nd2 15.Nd2 Qb8=) 14...e5 15.cd5? (better is 15.Bb2 Nd2 16.Nd2=) 15...Qc1–+ 16.Rc1 (16.Ne4 Qa3 17.Qa3 Ba3 18.Ne5 Ne5 19.Be5 Bd5 20.Ng3–+) 16...Rc1 17.Bf1 Nd2 (17...ed4?! 18.Ne4 de3 19.fe3 Bd5 20.Qa7 Be4 21.Qd7–/+) 18.Nd2 ed4 19.Qa7 (19.Qd4 Ba3 20.Nb3–+) 19...de3 20.fe3 Rc7 21.Qa4 Bd5 22.Qd4 Be6 23.a4 Ra8 24.g3 Nc5 25.Qe5 Rd7 26.Ne4 (26.Nc4 Na4 27.Qe4 Rd5–+) 26...Ne4 (better is 26...f6!? 27.Qc3 Ra4 28.Nf2–+) 27.Qe4 Rda7 28.Bd3 g6 (28...Ra4?? 29.Qh7 Kf8 30.Qh8#) 29.Bc2 Bf5 30.Qc4 Rc8 (30...Rc8 31.Qc8 Bc8–+) 0–1. Nikolic,Jovani – Piassi,Kildare (1910), Americana op, 2009.

4.Nf3 Nb6

5.a3 a6 6.d3 Na4 7.Bc1 Bg4 8.Be2 e6 9.c3 Qd7 10.0–0 Bd6 11.h3 Bh5 12.Qb3 0–0 13.Nbd2 b5 14.Bb2 Nb2 15.Qb2 c5 16.bc5 Bc5 17.d4 Bb6 (17...Bd6 18.a4 ba4 19.Qa2+=) 18.Ne5 (18.a4 Ba5 19.ab5 ab5+=) 18...Qd6 (18...Qc7 19.Bh5 Nh5 20.Rfc1+=) 19.Bh5 Nh5 20.Ndf3 f6 21.Nd3 Rac8 22.Rac1 (22.a4 Ba5 23.Nc5 Rb8+/–) 22...Bc7 23.Qb4 Qb6 (23...g6 24.a4 Rb8 25.Ra1=) 24.Nc5 (24.g4 e5 25.Qb3 Qd6+=) 24...e5 (24...Qd6 25.a4 Rb8 26.ab5 Rb5 27.Qa4+=) 25.Qb3 (better is 25.Nd7!? Qd6 26.Nf8 Rf8 27.g4+–) 25...Qc6= 26.Rfd1 e4 27.Nd2 f5+= 28.Nf1 Nf6 29.Qb2 f4 30.ef4 Bf4 31.Rc2 Bd6 32.Nb3 Nh5 33.Nbd2 Nf4 34.Nb3 Rf6 35.g3 Nh3 36.Kg2 Ng5 37.Ne3 Nf3 38.Rh1 Be7 39.Nc5 1–0. Fournier,Frederic (1715) – fegatello (1680), Active, 2006.

5.a3 Bg4 6.h3 Bf3 7.Qf3 Qd6 8.c4 dc4 (better is 8...Nbd7+=) 9.Bc4?? (better is 9.Qb7 c6 10.Bf6 Qf6 11.Nc3+/–) 9...Nc4–+ 10.Bf6 0–0–0?? (better is 10...Qf6 11.Qb7 Nb6–/+) 11.Bd4 e5 12.Qf7 ed4 13.Qc4 de3 14.Qg4 Kb8 15.de3 Qa6 (15...Qd5 16.0–0 Qe5 17.Ra2=) 16.Nd2+= Be7 17.Qc4 (17.Qg7? Bf6 18.b5 Qd6–+) 17...Qg6 18.Rc1 (18...Qg2 19.Qc7 Ka8 20.Rh2=). b4_player (2150) – JULION12 (1800), GameColony.com, 2004.

4.Nf3 c5

5.bc5 Qa5 6.c4 e6= 7.cd5 ed5 8.Qb3 (8.Bc3 Qc5 9.Bd4 Qa5=) 8...Bc5 (8...Nc5 9.Qb5 Qb5 10.Bb5 Bd7 11.Bd7 Ncd7 12.Bd4=) 9.Bf6 (9.Ne5 Be7=) 9...Nf6 10.Bb5 Ke7 11.0–0 (11.Nc3 Be6=) 11...Be6 (11...Qb4 12.d4 Qb3 13.ab3=) 12.d4 Bd6 13.Bd3 Rab8 (13...Qb4 14.Qd1=) 14.Nc3+= a6 (14...Qb4 15.Nb5+=) 15.Ng5 (15.Rfc1 Rhc8 16.Rab1 Qa3=) 15...Rhc8 (15...Qa3 16.g3=) 16.Rfc1 (16.Ne6? Rc3 17.Qb1 fe6–+) 16...b5 17.Ne6 (17.Rab1 Qa3+=) 17...fe6= 18.e4 (18.Rab1!?=) 18...Bb4=+ 19.Nd5 (19.Nd1 de4 (19...Ne4?! 20.Be4 de4 21.Rab1=) 20.Rc8 Rc8–/+) 19...ed5–/+ 20.e5 (20.Rc8 Rc8 21.e5 Ne4 22.Qd5 Ng5 23.Qb7 Rc7–/+) 20...Ne8 (20...Nh5 21.Qd5 Nf4 22.Qe4 Nd3 23.Rc8 Rc8 24.Qd3–/+) 21.Qd5 (better is 21.Rc8 Rc8 22.Qd5–/+) 21...Qd8 (better is 21...Rd8!? 22.Qb3 Qa3–/+) 22.Qe4= Bc3?? (better is 22...Nc7=) 23.Qh4+– Kf8 24.Qd8+/– Rd8 25.Rc3 g6 26.h4 Rd4 27.h5 b4 28.Rb3 a5 29.Bc2 gh5 30.Bh7 Kg7 31.Bc2 Nc7 32.Rg3 (White gets kings attack) 32...Rg4 33.Rg4 hg4 34.Bf5 g3 35.fg3 a4 36.Rd1+– Nb5 37.Rd7 Kh6 38.g4 Rh8 39.Rb7 b3 40.ab3 a3 41.Rb5 Ra8 42.Rb6 Kg7 43.Rb7 Kg8 44.Bb1 a2 45.Ba2 Ra2 46.e6 Re2 47.e7 Kf7 48.Kh2 Re3 49.b4 (49...Ke8 50.b5+–) 1–0. Lorenc,Tomas (2175) – Navratil,Frantisek (2210), CZE–chTV, 2001.

5.bc5 Qa5 6.Be2 e6 =.

5.bc5 Nc5

6.Bb5 Bd7 7.a4 Bb5 8.ab5 Qb6 (8...e6 9.0–0=) 9.0–0 (9.Qe2 a5+=) 9...g6 (9...Qb5!? 10.Bf6 gf6=) 10.Bd4+= e6?? (better is 10...Bg7+=) 11.Bf6+– Rg8 12.Nc3 Bg7 13.Bg7 Rg7 14.d4 Ne4 15.Ne4 de4 16.Ne5 f6 17.Nc4 Qb5 (17...Qc7 18.Ra4 a6+–) 18.Nd6 (18...Kf8 19.Nb5+–) 1–0. b4_player – gos63, gamecolony.com, 2006.

6.Bb5 Bd7 7.a4 Qb6 8.Nc3 g6? (better is 8...e6=) 9.Nd5!+– Nd5? (better is 9...Qd6 10.Bc4 Rc8+–) 10.Bd7 Kd7 (10...Nd7 11.Bh8 Qc7 12.0–0+–) 11.Bh8 Bh6 (11...f6 12.0–0+–) 12.Rb1 Qa6 13.Bd4 Na4 (13...Rc8+–) 14.c4! Ndb6 (14...Qc4 15.Ne5) 15.Ra1 (15...Ke8 16.c5+–) 1–0. marekt – KenAdams, ChessHere.com, 2005.

6.Bb5 Bd7 7.a4 e6 8.Be5 =.

6.Bb5 Bd7 7.Be2 e6 =.

6.Nc3 Nce4 =.

6.Bf6 gf6 7.Bb5 Bd7 8.Bd7 Qd7 9.d4 =.

4.Nf3 c6

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

5.a3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.c4 Qc7 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Qc7 5.c4 Nbd7).

5.c4 e6 6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3 c6).

4.Nf3 e5

5.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6).

5.Ne5 Bb4 6.Nd3 Bd6 7.Be2 0–0 8.Ba3 Ba3 9.Na3 Re8 10.c4 b6 11.0–0 Bb7 12.Ne1 Qe7 13.Nb5 Nc5 14.d4 Nce4 15.Qc2 a6 16.Nc3 dc4 17.Bc4 h5 (17...c5 18.dc5 Rac8 19.Ne4 Be4 20.Qe2+=) 18.Be2 (18.Rb1 Rac8=) 18...Ng5 (18...c5 19.dc5 Qc5 20.Ne4 Ne4 21.Qb2=) 19.Rd1 Qd6 20.h3 Qc6 (20...Rad8 21.Qf5 Nge4 22.Ne4 Be4 23.Qg5=) 21.Nf3 Rab8 (21...Nf3? 22.Bf3 Ne4 23.Be4 Re4 24.d5+–) 22.Rc1 Nf3 23.Bf3 Qd7 24.Bb7 Rb7 25.Na4 Ne4 26.Qc6 Qc6 27.Rc6 Re7 28.Rfc1 g6 29.Nb2 Ng5 30.Nd3 Ne6 (30...Rd7 31.Ne5 Re7 32.Kf1+/–) 31.Nb4 a5 (better is 31...Rd7!?+/–) 32.Nd5+– Kf8 33.Ne7 Ke7 34.d5 Nc5 35.Rc4 f6 36.Rf4 Nd7 37.g4 hg4 38.hg4 g5 39.Re4 Kf7 40.f4 gf4 41.ef4 b5 42.Rce6 Nc5 Black plans a4 (42...Kg6 43.f5 Kg5 44.Re7+–) 43.Re7 Kg6 44.Re3 b4 45.Rh3 a4 (45...c6 46.Rb7 Nb7 47.dc6 Nd6+–) 46.Reh7 1–0. algernon (2325) – sgp (2405), net–chess.com, 2016.

5.Ne5 Bb4 6.Nd7 Bd7 =.

5.Ne5 Ne5 6.Be5 Bb4 7.Nc3 c6 8.Qf3 Qe7 9.Bf6 gf6 10.Ne2 Rg8 11.Nd4 Bg4 (11...Bd6 12.h3=) 12.Qg3 0–0–0 (12...Bc5 13.c3 Rg5 14.Qh4=) 13.Bd3 (13.Rb1 Bd6 14.Qh4 Be5+=) 13...h5 (13...Be6 14.Qf3=) 14.c3 Bc5 15.Bh7 Bd6 (15...Rh8 16.Bf5 Bf5 17.Nf5=) 16.Nf5 Bf5 17.Bf5 Kb8 18.Qf3 h4 19.Rb1 Rh8 20.0–0 Rdg8 21.Qh3 Rh5 22.f4 Bc5 (22...Ka8 23.a4+=) 23.a4 Qc7 24.Rb2 Qa5 25.Bd3 f5 26.Rfb1 b6 27.Be2 Rh7 28.Qf5 Rhg7 29.Bf3 Ba3 (better is 29...Kc7!?+/–) 30.Ra2+– Bc5 31.c4 dc4 (31...Bb4 32.cd5 h3 33.Qd7+–) 32.Qe5 Kc8 33.Qe4 Rg6 (33...Qa6 34.Qc6 Kd8 35.Qf6 Kd7 36.a5+– (36.Qh4?! c3+–)) 34.Qc4 h3 (34...Re6 35.Rc2 Kd8 36.f5+–) 35.d4 1–0. marekt – Bill Kargel, ChessWorld.net, 2004.

4.Nf3 e6

5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3).

5.a3 c5 6.b5 Bd6 7.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3 0–0 7.c4 Nbd7).

5.a3 c5 6.bc5 Bc5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nbd7).

5.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7).

5.b5 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3).

5.b5 c5 6.c4 b6 7.a4 Bb7 8.Be2 Bd6 9.0–0 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.0–0 b6 9.a4 Bb7).

5.b5 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Nbd7).

5.Be2 Bb4 6.0–0 0–0 7.c4 dc4 8.Bc4 Nb6 9.Qb3 (9.Be2 Bd7–/+) 9...Nc4 (9...Bd6 10.Na3–/+) 10.Qc4 (10.Qb4 Nb2 11.Qb2 b6–/+) 10...Bd6 11.Nc3 (11.e4 b5 12.Qe2 Nd7–/+) 11...e5 12.d4 (12.Nb5 Be6 13.Qh4 Ng4–/+) 12...e4 13.Nd2 Re8 14.d5 c6 15.Rfd1 (15.dc6 Bh2! 16.Kh2 Ng4 17.Kg3 Qd6 (17...Qd2?! 18.cb7 Bb7 19.Kg4–/+) 18.f4 Qd2 19.cb7 Ne3–+ (19...Qe3 20.Kh4 Nh6 21.bc8B Rac8 22.Qb5–+)) 15...cd5 16.Qb3 Bh2! 17.Kh2 Ng4 18.Kg1 Qh4 (19.Nde4 de4–+ (19...Re4?! 20.Ne4 de4 21.Rd2–+)) 0–1. St_Jean,Benoit – McDowall,Michael, CC.2003.0.00064, 2003.

5.b5 Bd6

6.a4 0–0 7.Be2 c6 (7...c5 8.bc6 bc6 9.Nc3=+) 8.c4 (8.0–0 e5=+) 8...Qc7 (8...cb5 9.cb5 e5 10.0–0=+) 9.0–0 (9.cd5 Nd5 10.0–0 e5=) 9...dc4 (9...e5 10.Ba3=+) 10.Bc4 (10.Na3 e5 11.Nc4 e4 12.Nd6 Qd6=) 10...cb5 (10...Ng4 11.h3 Nde5 12.Be5 Ne5 13.Ne5 cb5 14.Bb5 Be5 15.d4 Bh2 16.Kh1=) 11.Bb5 Qb6 (11...e5 12.Qc1=+) 12.Bd4 (12.Na3 Qd8=) 12...Qa5 (12...Qd8 13.d3=) 13.Bc3 Bb4 (13...Qd8 14.d4=) 14.Qb3 Bc3 15.Nc3 (15.Qc3 Qc3 16.Nc3 a6 17.Bd7 Bd7+=) 15...b6 (15...a6 16.Bd7 Bd7 17.d4= (17.Qb7?? Rfb8 18.Qb8 Rb8–+)) 16.d4+= Bb7 (better is 16...a6 17.Qb2 Bb7+= (17...ab5? 18.ab5 Bb7 19.Nd2+–)) 17.h3 (17.Nd2!? Bd5 18.Nd5 ed5 19.Qd3+=) 17...a6 (17...Bf3 18.gf3 a6 19.Be2=+) 18.Bd3 (18.Be2!?=) 18...Rac8 (18...Bf3 19.gf3 e5 20.Be4=+) 19.Rfc1 (19.Na2 Bf3 20.gf3 Nd5=+) 19...Rc7 (19...Bf3!? 20.gf3 e5–/+) 20.Nd2= Rfc8 21.Nc4 Qg5 22.g3? (22.e4 Be4 23.Ne4 Ne4 24.Be4=+) 22...Nd5?? (better is 22...Bd5 23.Nb1 e5–+) 23.Ne4+= Qe7 24.Rc2 Nb4 25.Ned6 Nc2 26.Qc2 Qd6 27.Nd6 Rc2=+ 28.Nc8?? Rc8–+ 29.Rb1 Kf8 30.a5 b5 31.Kf1 Nf6 32.Ke2 Be4 33.Be4 Ne4 34.Kf3 Nd2 (35.Kf4 Nb1–+) 0–1. Durgashankar,Giridharan – Dresher,Kevin (1775), Dos Hermanas Internet Section, 2003.

6.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.c4 Nbd7 6.Nf3).

6.c4 0–0 7.Be2 c5 8.0–0 b6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.0–0 b6).

6.d4 c5 7.c4 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.d4).

6.d4 Qe7 7.c4 dc4 8.Bc4 Nb6 9.Be2 (9.Bd3 0–0=) 9...Bd7 (9...0–0 10.0–0=) 10.Nbd2 0–0 (10...c6 11.bc6 Bc6 12.Ne5=) 11.0–0 (11.e4 Bb4 12.a3 Bd2 13.Nd2 a6 14.ba6 ba6=) 11...c6 12.a4 cb5 13.ab5 Rfc8 14.Qb3 Nfd5 (14...Nbd5 15.e4 Nf4 16.Bc4+=) 15.Rfc1 (15.Ne4 Bb8+=) 15...Nc7 (better is 15...Qe8+=) 16.Ba3 (better is 16.Ne4+=) 16...Ba3=+ 17.Ra3 Bb5 18.Bb5 (18.Qb5 Nb5) 18...Nb5 19.Raa1 a6 20.Ne5 (20.Ne4 Rc1 21.Rc1 Nd7=+) 20...Nd5 21.Ne4 Qb4 (21...b6 22.Rc8 Rc8 23.Nc4=+) 22.Qb4 (22.Qd1 Rc1 23.Rc1 Qe7=+) 22...Nb4 (22...Rc1 23.Rc1 Nb4 24.Kf1–/+) 23.h3 (23.Nc5 Rc7–/+) 23...Nd5 (23...Rc1 24.Rc1 f6 25.Nc4–/+) 24.Nc5 (24.Rc8 Rc8 25.Nd3 Rc7–/+) 24...b6 25.Ne4 (25.Na4 Nd6–/+) 25...a5 26.Kf1 Kf8 27.Ke1 f6 28.Nf3 Ke7 29.Ned2 Nb4 30.Rc4?? Nc2 31.Rc2 Rc2 32.Rb1 Nc3 33.Ra1 Rc8 34.Ng1 a4 35.Ne2 b5 36.Nf4 b4 37.Nd3 Na2 38.Nc5 Ra8 39.Kd1 b3 40.f4 Nc3 41.Ke1 b2 42.Ra3 Rd2 (43.Kd2 b1Q 44.Rc3 a3–+) 0–1. Seitz,Dan – Norman,Ricky, Arlington CC–ch, 1999.

4.Nf3 g6

5.a3 Bg7 6.c4 dc4 7.Bc4 0–0 8.0–0 Nb6 9.Be2 c6 10.d4 e6 (10...Bf5!?=) 11.Nbd2 Nfd5 12.Nc4 Nc4 13.Bc4 Nf6 14.Rc1 b5 (14...Nd5 15.Qe2+=) 15.Bd3+/– Bb7 16.Qb3 (16.Ne5 Qd6+/–) 16...a5+= 17.Rfd1 a4 (17...Qd5 18.Qc3+=) 18.Qc2+/– Qd7 (better is 18...Rc8!?+/–) 19.Ne5+– Qd5 20.f3 (20.Nc6 Rfe8 21.Qc5 Qc5 22.Rc5+– (22.bc5? Bc6 23.Rb1 Rab8–+)) 20...Rac8+/– 21.e4 Qd8 22.Bf1 Nd7 23.Nd7 Qd7 24.Qf2 Rfd8 25.Rd2 e5 26.Rcd1 ed4 27.Bd4 Bd4 28.Rd4 Qe7 29.Qd2 Rd4 30.Qd4 Qg5 (30...c5 31.bc5 Qc5 32.Qc5 Rc5 33.Rd7=) 31.h3 h5 32.Qd7 Qe3 33.Kh1 Qb6 34.Qe7 Rf8 35.Rd7 Ba8 (35...Bc8!? 36.Rd6 Qf2 37.Bb5 cb5=) 36.Bd3 Qe3 37.Qf6 Qc1 38.Kh2 Qa3?? (better is 38...h4+/–) 39.e5+– Qc3 (39...Qa2 40.Bg6 Qe6 41.Bh7 Kh7 42.Qe6 h4 43.Qf5 Kh8 44.Qh5 Kg7 45.Qg5 Kh7 46.Rd4 c5 47.Rh4) 40.Bg6! h4 (40...fg6 41.Qg7#) 41.Bf7 (41.Bf7 Rf7 42.Qf7 Kh8 43.Qg7) 1–0. Fournier,Frederic (1990) – Voronkov,Maksim A, ChessOK.com, 2013.

5.a4 Bg7 6.c4 c6 7.Qb3 0–0 8.d3 Re8 9.Ne5 (9.cd5 cd5 10.Nc3 a5=) 9...Ne5 10.Be5 Be6 11.Nc3 Rc8 (11...dc4 12.dc4 Ne4 13.Rd1 Be5 14.Ne4=) 12.d4 a5 13.c5 Ne4 14.Bg7 Kg7 15.f3 Nf6 16.Kf2 (16.ba5 Qa5 17.g4 Bd7+=) 16...h5 (16...b6!?=) 17.Bd3+= Rb8 18.b5 b6 19.bc6 (19.Qc2!?+=) 19...bc5= 20.Bb5 cd4 21.ed4 Qb6 (21...Qc7!?=) 22.Ne2+= Red8 23.Qa3 Qc7 24.Rab1 Bf5 25.Rb2 e5 26.de5 Qe5 27.Rd2 Re8 (27...Be6!?=) 28.Qc3+/– Re7 29.Qe5 (< 29.Qa5 Qe3 30.Ke1 d4=+) 29...Re5 30.Nd4 Kf8 31.Rc1 (31.Nf5 Rf5 32.c7 Rc8+/–) 31...Bc8 32.Nb3 Ra8 33.Nc5 Ra7 34.Nd3 Rf5 35.Kg1 Rc7 36.Re2 (36.Nc5 Re5+/–) 36...Ne8 (36...h4!?+=) 37.Ne5+/– Be6 38.Ng6! Kg7 (38...fg6 39.Re6) 39.Ne5 Nd6 40.Rce1 Rg5 41.Nd3 (41.h4 Rf5+–) 41...Kf6 (41...d4 42.Ne5+/–) 42.Nc5+– Bf5? (better is 42...Bc8+–) 43.Nd7 Kg7 44.Nb6 (better is 44.Re5 d4 45.Rd5+–) 44...Be6 45.Re5 Rg6? (better is 45...Rf5+–) 46.Nd5 Rc8 (46...Bd5 47.Rd5 h4+–) 47.Ne7 (47...Rh6 48.Nc8 Bc8 49.Bd3+–) 1–0. De Visser,Arno – Bergman,E, 1992.

5.c4 dc4 6.Bc4 Nb6 7.Be2 =.

5.c4 dc4 6.Bc4 Bg7 7.Bf7! Kf8 (7...Kf7 8.Ng5 Combination) 8.Ng5 Nb6 9.Qb3 Nbd5 10.Be6 Qd6 11.Bc8 Rc8 12.e4 Qb4 (12...Ne4 13.Ne4 Qb4+–) 13.ed5 Qb3 14.ab3 Nh5 (14...a6 15.Kd1+–) 15.Ne6 Kf7 16.Bg7 Ng7 17.Ng7 Kg7 18.Ra7 b6 (18...Rhd8 19.Nc3 Ra8 20.Ra8 Ra8 21.Ke2+–) 19.0–0 Rhf8 20.Re1 Rf7 21.Nc3 1–0. Fournier,Frederic (2110) – San Luis,Lorenzo (2095), Chess.com (World League Match FRA–PHI ), 2012.

5.c4 e6 6.c5 Bg7 7.Be2 0–0 8.0–0 c6 9.a4 (9.d4 a5 10.ba5 Ne4+=) 9...a6 (9...a5 10.Qb3=) 10.a5 Re8 11.d4 Qc7 12.Nbd2 Re7 13.Qc2 h6 14.Bd3 Nf8 15.Ne5 Kh7 16.f4 N6d7 17.Rf2 f5 18.h3 (18.Bc3 Rb8+/–) 18...Nf6 (18...Rb8 19.Rb1+/–) 19.g4 Ne4 20.Rg2 Bd7 21.gf5 (21.Be2 Bf6+/–) 21...ef5+= 22.Ndf3 (< 22.Ne4 fe4 23.Be2 Bh3=+) 22...Be8 23.h4 Nf6 24.Qf2 Ne4 25.Qe2 Bf6 26.Rh2 (26.h5!?+=) 26...Rg7 27.Qg2 Qe7 28.Qh3 Rc8 (28...Bd7 29.h5 g5 30.Nd7–/+) 29.Kh1 (29.Ng5 Kg8 30.Ne4 de4 31.Be4 Rd8+/–) 29...Ne6 30.Rg1 Bf7? (better is 30...Be5!? 31.de5 Bd7+=) 31.Nf7 Qf7 32.Ng5 (32.h5 Rcg8 33.hg6 Rg6 34.Qf5+–) 32...N4g5?? (better is 32...Bg5 33.hg5 h5+=) 33.hg5+– (33...Bg5 34.Rg5+– (34.fg5?! h5+–); 33.fg5?! Be7+/–) 1–0. Kucharkowski,Jens – Enderlein, Freital, 1982.

5.c4 e6 6.cd5 ed5 7.Qb3 c6 8.d4 Bg7 9.Bd3 0–0 10.Nbd2 Re8 11.0–0 Nf8 (11...a5 12.a3=) 12.Rfc1 Bd7 13.a4 White prepares b5 13...Ne4 14.b5 Rb8 15.Ba3 c5? (better is 15...Bf5+=) 16.Bc5+– Nc5 17.Rc5 (17.dc5?! Ba1 18.Ra1 Bg4=) 17...Be6 18.Rac1 Qa5 19.Qa2 Rec8 20.Nb3 Qd8 21.Rc8 Rc8 22.Rc2 Nd7 23.Ne1 Nf6 24.Nc5 Qe7 25.Ne6 Qe6 26.Rc8 Qc8 27.Qc2 Qd7 28.Qc5 b6 29.Qc6 Qe7 30.Nc2 h6 31.Qc3 Bf8 32.Ne1 Kg7 33.Bc2 Qd8 34.Nd3 Bd6 35.Nb4 Ng4 36.h3 Nf6 37.Nc6 Qc7 38.Qb3 g5 (38...a6 39.Bd3+/–) 39.Qd3 Ne4 40.f3 Bh2 41.Kf1 Ng3 42.Ke1 f5 43.Ne5 Qe7 44.Qc3 Nh5 45.Bf5 Bg3 46.Kf1?? Nf6?? 47.Qc8 Be5+/– 48.de5 Qe5 49.Qb7 Kf8 50.Qa8 Ne8 51.Bd7 Qe3 52.Qd5 Nf6 53.Qd6 Kf7 54.Bf5 h5 55.Qc7 Qe7 56.Bg6! Kf8 57.Qc8 Kg7 58.Qf5 Kh6 59.h4! gh4 60.f4 Kg7 61.Qg5 Ng8 62.Qh5 Nh6 63.Bd3 Qf6 64.Qg5 Qg5+= 65.fg5 Nf7 66.g6 Ne5 67.Bc2 Ng6 68.Kf2 Ne5 69.Ke3 Kf6 70.Kf4 Nc4 71.Bb3 Ne5 72.Bd5 Ng6 73.Kg4+/– Ke5 74.Bc6 Nf4 75.Kf3 h3 76.g3 Nd3 77.g4 h2 78.Kg2 h1Q 79.Kh1 Nf2 80.Kg2 Ng4 81.Kf3 ½–½. Silva,Janderson R Da (1790) – Bueno,Marcos A Ferr (1735), Curitiba BRA, Open, 2014.

5.Be2 Bg7 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 Nbd7).

5.c4 c6

6.Nc3 Nb6 7.c5 Nbd7 8.Be2 Bg7 9.a4 (9.d4 0–0+=) 9...0–0 10.a5 Re8 11.0–0 e5 12.Qb3 Qc7 13.e4 (13.d3 Ng4 14.h3 Ngf6=) 13...de4 (better is 13...d4!? 14.Na4 Ne4=) 14.Ng5+= Re7 15.Bc4 Nf8 16.Nce4 Ne4 17.Ne4 Be6 18.Nd6 Bc4 19.Qc4 Ne6 20.Rfe1 Nd4 (better is 20...Nf4+=) 21.f4!+– Nf5 (21...ef4 22.Re4 Double attack (22.Bd4 Deflection; 22.Re4 Decoy)) 22.fe5 Nd6?? (better is 22...Rd8+–) 23.cd6 Qd7 24.de7 Qe7 25.Bc3 (25.a6 Rb8+–) 25...Rd8 (25...Qe6 26.Qh4+–) 26.e6 (26.a6 Rd5+–) 26...Rd5 (26...a6 27.ef7 Qf7 28.Qf7 Kf7 29.Bg7 Kg7 30.Re7 Kh6 31.Rb7 Rd2 32.Rc1+–) 27.Bg7 (27.a6 fe6 28.ab7 Qb7 29.Re6 Bc3 30.dc3 Qf7+–) 27...Kg7 28.ef7 Qf7 29.Ra3 (29.a6 Rd7 30.Re6 Qf5+–) 29...Qf6 (29...Rd7 30.Qf7 Kf7 31.a6+–) 30.Qc3 (30.Rf3 Rf5 31.Rf5 gf5+–) 30...Rd4 (30...Rd7 31.a6 Qc3 32.Rc3+–) 31.Qe3 (31.Re8 Kf7 32.Rb8 Qe7+–) 31...Rd7 (31...a6 32.Qe8 Rh4 33.Qe7 Qe7 34.Re7 Kf6 35.Rb7+–) 32.Qe5 (better is 32.Qa7!? Qb2 33.Qe3 Rf7+–) 32...Qe5 33.Re5 Kf6 34.Re2 Rd4 (34...h6 35.a6+–) 35.Rf3 Kg5 36.Re5 Kg4 (36...Kh4 37.Rf7 h6 38.Rb7 Rd2 39.Ra7 Rd1 40.Kf2 Rd2 41.Kf3 Rd3 42.Re3+–) 37.h3 Kh4 38.Kh2 g5 39.Rf6 Kh5 40.g4 (40.g4 Rg4 41.Ree6 Rg2 42.Kg2 g4 43.Rf5 Kh4 44.Rh6#; 40.Ree6 g4 41.Rf5 Kh4 42.g3#) 1–0. Lopez Garrido,Daniel (1915) – Novoa Blanco,Jose Manuel, Burgas op, 2009.

6.cd5 cd5 7.Nc3 Nb6 8.Bb5 Bd7 9.Bd7 Qd7 10.Ne5 Qf5 (10...Qd8 11.Na4+=) 11.Nb5 Rc8 12.Na7 Rd8 13.Nb5 Bg7 14.Nc7 Kf8 15.d4 h5 16.0–0 Ng4 17.Rc1 Ne5 18.de5 Be5 19.Bd4 Nc4 20.a4 (20.Re1 Nb2 21.Bb2 Bb2+/–) 20...Bc7 (20...h4!?+=) 21.Bh8+/– f6 22.Qd4 Kf7? (better is 22...Qe5! 23.Qe5 Be5+= (worse is 23...fe5 24.Rfd1+–)) 23.Rc4+– dc4 24.Qc4 Qd5 25.Qc7 Rh8 26.h3 Rd8 27.Rc1 Rd7 28.Qc4 Qc4+/– 29.Rc4 Ke6 30.Kh2 b6 31.Rc6 Rd6 32.Rd6 Kd6 33.Kg3 g5? 34.h4+– Kd5? 35.hg5 fg5 36.f4 gf4 37.ef4 Kc4 38.a5 Kb5 39.ab6 Kb6 40.Kh4 Kb5 41.Kh5 Kb4 42.g4 Kc5 43.g5 Kd5 44.g6 Ke6 45.Kg5 (45.Kg5 Kd5 46.g7+–) 1–0. Fournier,Frederic (2555) – Wychi(C) (2290), Active (3/5), 2004.

6.cd5 cd5 7.Nc3 Nb6 8.Be2 Bg7= 9.0–0 0–0 10.d3 Bd7 (10...Bf5 11.Nd4=) 11.Ne5 (11.Rc1 Qb8+=) 11...Rc8 12.Nd7 (12.Rc1 Bf5=) 12...Nbd7 (12...Qd7 13.a4=) 13.Qb3 e6 14.h3 (14.Rac1 Qe7+=) 14...a6= 15.a4 (15.Rac1 Nb6=) 15...Qe7 16.Rfc1 Rc7 17.Nd1 (17.d4 Nb6+=) 17...Rfc8 18.Rc7 Rc7 19.f4 (19.a5 Qd6=) 19...Nb8 (19...Qd6 20.b5+=) 20.Nf2 Nc6 21.e4 (21.b5!? Na5 22.Qd1=) 21...Qb4+= 22.Qc2? (22.Qb4!? Nb4 23.Rb1–/+) 22...Qb6 (better is 22...Nd4 23.Qc7 Ne2 24.Kh2 Qb2–+) 23.Rb1–/+ Nb4 24.Qb3 de4 (24...Rc2 25.Bf6 Re2 26.Bh4–+) 25.Bf6 (better is 25.Be5 ed3 26.Bc7 Qc7 27.Nd3 Nd3 28.Qd3+=) 25...a5?? (better is 25...Bf6 26.a5 Qe3 27.Qb4 Bd4–+) 26.Bd8 (better is 26.Bg7 ed3 27.Be5+–) 26...Qc5?? (better is 26...Bd4 27.Kh1 Bf2 28.de4 Qd6 29.Bc7 Qc7+/–) 27.Bc7+– Qc7 28.de4 (worse is 28.Ne4 Qf4 29.Rf1 Qe3 30.Rf2 Qc1 31.Kh2 Be5 32.g3 Bd4+–) 28...Qf4 29.Qd1 (29.Qc4 Qb8+–) 29...h6 (29...Bf6 30.Ng4 Be7 31.Qd7 Qe4 32.Rf1+– (32.Qe7?! Qb1 33.Kh2 Qb2 34.Nf6 Kg7+–)) 30.Qd8 Kh7 31.Qa5 Bd4 (31...Nc6 32.Qe1 Qc7+–) 32.Bf3 (better is 32.Qb4 Qf2 33.Kh1+–) 32...Nd3+/– 33.Rf1?? (33.Rd1 Qg3 34.Qd2 Bf2 35.Kh1 Ne5+=) 33...Qe3 (better is 33...Nf2 34.Qe1 Ng4 35.Rf2 Nf2 36.Kf1 Nd3 37.Qb1 Qe3 38.Qd3 Qf2) 34.Qb5 (better is 34.Qc7!? Kg8 35.a5+=) 34...Nf2–/+ 35.Kh2?? (better is 35.Qe2 Qe2 36.Be2 Ne4 37.Kh2+=) 35...Qf4–+ 36.g3 (36.g3 Qf3 37.a5–+). Hilbert,Stephan J (1650) – Mazo,Joel (1615), FICGS, 2013.

6.cd5 cd5 7.Nc3 Nb6 8.Ne5 Bg7 +=.

6.cd5 cd5 7.Nc3 e6 +=.

6.Be2 dc4 7.Bc4 Nb6 8.Be2 =.

6.Be2 Bg7 7.cd5 cd5 8.0–0 0–0 9.Qb3 a6 (9...Nb6 10.Rc1=) 10.Rc1+= b5 (10...Nb6 11.Be5 Bg4 12.d4+=) 11.a4 (11.Nc3+/–) 11...Qb6 (better is 11...ba4!? 12.Qa4 h6+=) 12.ab5+– a5? (better is 12...Nb8+–) 13.Qa4 Bb7 (13...Qd8 14.ba5 Re8 15.Qb4+–) 14.ba5 Qd6 (14...Qd8 15.Qb4+–) 15.Ba3 Qe6 16.Nd4 Qe4 (16...Qe5 17.a6+–) 17.Nc3 Qh4 18.Be7 Ne5 (18...Rfe8 19.a6+–) 19.Nf3 Nf3 (19...Qa4 20.Ra4 Rfe8 21.Bf6 Bf6 22.a6 Nf3 23.Bf3 Bc3 24.dc3+–) 20.Bf3 Qa4 21.Ra4 Rfe8 (21...Rfb8 22.a6 Ne8 23.Nd5+–) 22.Bf6 Bf6 23.Nd5 Bd5 24.Bd5 Red8 (24...Rab8 25.a6 Rb5+–) 25.Ba8 Ra8 26.b6 (26...Be5 27.a6+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.f4 e6

5.a3 c5 6.b5 b6 7.Nf3 c4 8.d3 Bc5 9.Bd4 Qc7 10.Be2 Bd4 11.Nd4 Bb7 12.0–0 e5 13.fe5 Qe5 14.Qd2 0–0 15.Rf5 Qd6 16.Nc3 Bc8 17.Bf3 Ne5 18.Rf6 Qf6 19.Bd5 Rb8 20.Nc6 Nc6 21.bc6 Be6 22.Rf1 Qe5 23.Bf3 Qa5 24.d4 h5 25.Rd1 Rbc8 26.d5 Bg4 27.Nb1 Rfd8? 28.Qa5+– ba5 29.Nc3 Bf3 30.gf3 f5? 31.Rd4 Kf7 32.Rc4 Kf6 33.Rd4 a6 34.Ra4 Rd6 35.Ra5 Rcc6?? 36.dc6 Rc6 37.Nd5 Kg5 38.Nb4 Re6 39.Kf2 g6 40.Ra6 1–0. Hyatt,Cliff – Headbird,R, Social Bi–Monthly, 1998.

5.a3 c5 6.c3 Ne4 (6...Bd6!?–/+) 7.Nf3+= Be7 (7...a5 8.Bb5+=) 8.d3 (8.c4 0–0+=) 8...Nd6 (8...Nef6 9.h3+=) 9.Be2 Bf6 (9...Qb6 10.Kf2+=) 10.0–0 (10.e4 Be7=) 10...cb4 (10...0–0!?+=) 11.ab4= 0–0 12.Qe1 (12.Na3 e5=) 12...Qb6 13.d4 Qc7 14.Bd3 Nc4 15.Bc1 Ndb6 16.Nfd2 (16.Na3 Bd7=) 16...Bd7 17.Na3 (17.Nc4 Nc4 18.Nd2 Nb6=) 17...Nd2 (17...a5!? 18.ba5 Na5–/+) 18.Bd2= a5 (18...g6 19.Qg3=) 19.Qb1 (19.ba5 Ra5 20.c4 Ra3 (20...dc4?? 21.Bh7 Kh7 22.Ba5+–) 21.Ra3 dc4+=) 19...g6 20.ba5 Nc4 (20...Ra5 21.c4 Ra3 22.Ra3 Nc4 23.Ra2+=) 21.Nc4+/– dc4 22.Be2 Bc6 (22...Ra6 23.Qb4 Rfa8 24.Bc4 Ra5 25.Ra5 Ra5 26.Bd3+/–) 23.Bc4 (23.Qb6!? Rfc8 24.Bc4 Bg2 25.Qc7 (worse is 25.Kg2 Qc4 26.Qb7 Rab8+=) 25...Rc7 26.Kg2 Rc4 27.Rfb1+/–) 23...Bg2+= 24.Kg2 Qc4 25.Qb7 Bh4 (25...Rfb8 26.Qf3 Bd8 27.Kg3+=) 26.Qf3+/– Ra6 27.Kh3 Bf6 28.Rfb1 Qd3 29.Rb2 Rfa8 30.Rba2 Bd8 31.Kg2 (31.Qf1 Qf5 32.Kg3 Ra5 (32...Ba5? 33.Qf3+–) 33.Ra5 Ra5 34.Ra5 Ba5+=) 31...Kg7 (better is 31...Ra5!? 32.Qa8 Ra8 33.Ra8 Qd2 34.Kf3 Kg7 35.Rd8 Qh2=) 32.e4+/– Qf3 (better is 32...Qb5!?+/–) 33.Kf3+– Ra5 34.Ra5 Ra5 35.Ra5 Ba5 36.Ke3 Kf8 37.c4 Bc7 38.h3 Ke8 39.Kd3 Kd7 40.c5 f5 41.d5 fe4 42.Ke4 ed5 43.Kd5 Bb8 44.c6 Kc8 45.Be3 Kd8 46.Kc4 Ke7? 47.Kb5 Kd6?? 48.Bd4 Kd5 49.Be5! (49.Be5 Be5 50.fe5+–) 1–0. Cebolla Moll,Ricardo (2045) – Benedito Salavert,Jaime (1925), Championship Provincial Individual ABSO, 2012.

5.a3 c5 6.Nf3 cb4 7.Be2 Bd6 =.

5.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Nbd7 5.f4).

5.b5 c5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.f4 Nbd7).

5.b5 c5 6.Nf3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.f4 Be7 6.Nf3 Nbd7).

3.e3 e5

4.b5 Bc5 5.Be5+= Nbd7 6.Bb2 (6.Bf4 Ne4+=) 6...0–0 (6...a6 7.ba6 ba6 8.Nc3+=) 7.Nf3 Ne4 (7...a6 8.ba6 b6 9.Be2+=) 8.d4 (8.Be2 a6+=) 8...Bb4 9.c3 Be7 10.Nbd2 Nb6 11.Bd3 Nd6 12.Qc2+/– h6 13.Ne5 Bf6 14.Ba3 Be6 15.0–0 Re8 16.Rab1 g6 17.e4 c6? 18.bc6+– de4? 19.Ne4 Bc4 20.Nd6 Re6 21.Nef7 Qf8 22.Bc4 Re7 23.cb7 Rb8 24.Rb6! ab6 25.Ne5 (25.Ne5 Rf7 26.Bf7 Kh7 27.Qg6 Kh8 28.Ne8 Be5 29.Bf8 Bh2 30.Kh2 Re8 31.Qh6#) 1–0. Plock,Joerg (2120) – Heineccius,August (1605), R.–Tobies–Gedenkturnier–D, 2003.

4.b5 d4 (--> 1.b4 e5 2.b5 d5 3.Bb2 d4 4.e3 Nf6).

4.b5 Bd6 (--> 1.b4 e5 2.b5 d5 3.Bb2 Bd6 4.e3 Nf6).

4.b5 Nbd7 (--> 1.b4 e5 2.b5 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.b5 e4 (--> 1.b4 e5 2.Bb2 e4 3.e3 Nf6 4.b5 d5).

4.b5 Ne4 5.Be5 Nf2?? (better is 5...Nd7 6.Bd4 a6+=) 6.Kf2+– Qh4 (6...Nd7 7.Bd4 Nc5+–) 7.Bg3?? (better is 7.g3 Qe7 8.Nf3+–) 7...Qf6= 8.Nf3 Qa1 9.Bd3? (9.Be5!? Qa2 10.Nc3=) 9...Bd6 (9...c6!?–/+) 10.Bd6=+ cd6 11.Nc3 Qb2 12.Nd5+= Kd8 13.c4 Qa2 14.Nb4 Qa3 15.Qb1 Qa5 16.Qb2+/– Nc6?? 17.Nc6 bc6 18.Qg7 Re8 19.bc6 Re7?? 20.Qf8 Re8 21.Qd6 (21...Bd7 22.Qd7#) 1–0. brit3456 – Pelle3, Live Game Caissa's Web, 2005.

4.b5 Bg4 5.f3 Bh5 (5...Bf5 6.Be5 Nbd7 7.Bd4=) 6.Be5 Nbd7 7.Bb2 Ne4 (7...Nb6 8.Nh3+=) 8.g3 Qg5? (better is 8...Nec5=) 9.Nh3+– Qe7 (9...Qh6 10.Nf4 Nec5 11.Nd5+–) 10.Nf4 Nef6 11.Nh5 (11.Nc3 Qd6+–) 11...Nh5 12.Bg2 (12.c4 Nb6 13.cd5 0–0–0+–) 12...Qb4 13.Ba3 (13.Qc1!?+/–) 13...Qb5+= 14.Nc3 Qa5 15.Bf8 Rf8 16.Rb1 0–0–0 17.Rb5 Qa3 18.Rd5 Nhf6 19.Rd4 Nb6 20.Rd8 Rd8 21.Qb1?? (better is 21.Bf1=) 21...Rd2?? (better is 21...Nc4 22.Nb5 Qa5–+) 22.Kd2+/– Nc4 23.Kd3 Nb2 24.Ke2 Qc3 25.Re1 (better is 25.Qc1 b6 26.Qd2 Qc4 27.Kf2 Qa2 28.e4+/–) 25...Nc4? (better is 25...Nd5 26.Qc1 Nc4+/–) 26.Qb3+– Qd2 27.Kf1 Qd5 28.Qd3 Qc5?? (28...b5+–) 29.Bh3 1–0. De Bock,Lennart (1895) – Toscani,Marco, Quebec CAN, 2014.

4.Be2 Bb4 5.Be5 Nbd7 (5...0–0 6.Nf3 Nc6 7.Bb2 Re8 8.0–0+=; 5...Nc6 6.Bb2 0–0 7.Nf3 Re8 8.0–0+=; 5...Qe7 6.Nf3 Bg4 7.c3 Nc6 8.Bc7=) 6.Bc3 Bd6 7.Nf3 0–0 8.0–0 +=.

4.Be2 Bd6 A) 5.b5 e4 (5...0–0 6.Nf3 e4 7.Nd4 c5 8.bc6+=; 5...c5 6.Nf3 Qc7 7.d3 0–0 8.Nbd2+=; 5...Bf5 6.Nf3 Nbd7 7.0–0 0–0 8.Nc3+=) 6.f3 a6 7.ba6 Na6 8.Nc3–/+; B) 5.a3 a5 (5...Nbd7 6.Nf3 a5 7.b5 c5 8.bc6+=; 5...0–0 6.Nc3 Nbd7 7.Nf3 a6 8.0–0+=; 5...e4 6.Nc3 a5 7.Nb5 Be7 8.Be5+=) 6.b5 e4 7.d3 0–0 8.de4+=.

4.Be2 Nbd7 A) 5.b5 c5 (5...Bd6 6.Nf3 c5 7.bc6 bc6 8.Nc3+=; 5...e4 6.Nh3 Bd6 7.Nf4 a6 8.a4+=; 5...a6 6.Nf3 Bd6 7.Nc3 0–0 8.0–0+=) 6.Nf3 Bd6 7.0–0 0–0 8.d3+=; B) 5.Bc3 Ne4 (5...a5 6.ba5 Bd6 7.Nf3 Ne4 8.0–0+=; 5...Bd6 6.Nf3 Qe7 7.a3 0–0 8.0–0+=; 5...a6 6.Nf3 Bd6 7.0–0 0–0 8.d3+=) 6.Nf3 Nc3 7.dc3 c6 8.0–0+=; C) 5.a3 Bd6 (5...a5 6.b5 Bd6 7.Nf3 0–0 8.0–0+=; 5...e4 6.Nh3 a5 7.b5 Bd6 8.0–0+=; 5...c5 6.bc5 Bc5 7.Nf3 Bd6 8.Nc3+=) 6.Nf3 a5 7.b5 c5 8.bc6+=.

4.Be2 e4 5.a3 (5.b5 Be7 (5...Be6 6.Nc3 Bd6 7.f3 Nfd7 8.g3+=; 5...Bd6 6.d3 Be6 7.Nd2 Nbd7 8.Bd4+=; 5...a6 6.Nc3 Be6 7.d3 ab5 8.Nb5+=) 6.Nc3 0–0 7.a4 Be6 8.d3+=; 5.Bc3 Bd6 (5...Be6 6.d3 Bd6 7.Nd2 Nc6 8.a3+=; 5...Bd7 6.d3 Bd6 7.Nd2 Nc6 8.a3+=; 5...Be7 6.a3 0–0 7.d3 Be6 8.Nd2+=) 6.d3 0–0 7.de4 Ne4 8.Qd5+=) 5...Be7 (5...a5 6.b5 Bd6 7.d3 0–0 8.de4+=; 5...Be6 6.Nc3 a5 7.b5 Bd6 8.d3+=; 5...Bd6 6.Nc3 a5 7.Nb5 Be7 8.Be5+=) 6.d3 (6.Nc3 a5 7.b5 0–0 8.d3+=) 6...0–0 7.de4 (7.Nc3 a5 8.b5+=) 7...de4 8.Qd8 Rd8 9.Nd2 c5 10.b5 Nbd7 11.Nh3 Nb6 12.0–0–0 Na4 13.Bf6 Bf6 14.Ne4 Bb2 15.Kb1 Bh3 16.gh3 b6 17.Bc4 Be5 18.Bd5 Rac8 19.f4 Nc3 20.Nc3 Bc3 21.e4 Bd4 22.Rd3 Kf8 23.c3 Bf6 24.Kb2 c4 25.Rdd1 Rc5 26.a4 Be7 27.Rd4 Rd6 28.Re1 (28.Rc4? Rdd5 29.Rc5 Rc5–+) 28...Rh6 29.Bc4 Rh3 30.Kb3 White prepares e5 30...Rh2 31.Rd7 g6 (31...Rc8 32.Ra7 Rd8 33.Rb7+–) 32.Ra7 Rd2 (32...Rh4 33.Rf1 f5 34.Ra8 Kg7 35.Rg8 Kh6+–) 33.Rb7 Rd6 34.e5 (34.e5 Rd8 35.Rb6+–) 1–0. garcia2102 (2025) – soltpl (2045), gameknot.com, 2015.

4.Be5 Bd6 5.Bd6+= cd6 (5...Qd6 6.a3+=) 6.c4 (6.Nf3!?+/–) 6...0–0 7.cd5 Nd5 8.Bc4 (8.a3 a5+=) 8...Be6 (8...Nb4 9.Nf3=+) 9.Nf3 (9.Bd5 Bd5 10.Nf3=) 9...a6 (9...Nb4 10.Be6 fe6 11.Qb3=+) 10.0–0 (10.Qb3 Qf6 11.d4 Nb6 12.Be6 fe6+/–) 10...b5 (10...Ne3 11.de3 Bc4 12.Re1=) 11.Bb3 (11.Bd5 Bd5 12.Nc3 Bc6+/–) 11...Nc6 (11...Nb4!? 12.Nc3 N8c6=) 12.a3+= Ne5 13.d4 Nf3 (13...Nc4 14.Bc4 bc4 15.Re1+/–) 14.Qf3 Rc8?? (better is 14...Nf6 15.Nd2 Qe7+/–) 15.Bd5+– Bd5 16.Qd5 Qe7 (16...Qd7 17.a4 ba4 18.Qa5+–) 17.Nd2 (17.a4 Rb8+–) 17...Rc2 (17...Qe6 18.Qe6 fe6 19.a4+–) 18.Rfd1 (18.Ne4 Rc4+–) 18...h6 (18...Rfc8 19.Ne4 R8c6 20.Qf5+–) 19.Ne4 Kh8 (19...Rd8 20.a4+–) 20.Nd6 Rd8 (20...Qe6 21.Qf5 Qf5 22.Nf5 Rd8+–) 21.Nf7 Kh7 22.Nd8 Rc7 23.Ne6 Rd7 (24.Qd7! Qd7 25.Nf8 Kg8 26.Nd7 g5+–) 0–1. wesolyPolak – just_tasty, GameColony.com, 2002.

4.Nf3 Bb4 5.Be5 0–0 6.a3 +=.

4.Nf3 e4–/+ 5.Nd4 Bb4 6.a3 Be7 7.Be2 0–0 8.0–0 c5 9.Nf5?? (better is 9.Nb3–/+) 9...Bf5–+ 10.c4 d4 11.ed4 cd4 12.d3 ed3 13.Bd3 Bd3 14.Qd3 Nc6 15.Rd1 Bc5 16.Nd2 Re8 17.Nb3 Ne5 (17...Qd6 18.Nc5 Qc5 19.Rab1–+) 18.Qg3 (18.Qb1 Nfg4 19.Qe4 Qh4–+) 18...Nc4 19.Bd4 Bd4 (19...Ba3?! 20.Bc5 Nd5 21.Ba3 Na3 22.Qf3–+). Neumann,Frank – Wood,Brian, OP–2011–0–01980, 2012.

4.a3

4.a3 (--> 1.b4 e5 2.a3 d5 3.e3 Nf6 4.Bb2).

4.a3 Nc6 (--> 3.e3 Nc6 4.a3 e5).

4.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6).

4.a3 Nbd7 (--> 1.b4 e5 2.a3 d5 3.Bb2 Nd7 4.e3 Ngf6).

4.a3 Nbd7 5.c4 c6 6.cd5 cd5 7.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

4.a3 Nbd7 5.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6).

4.Be5 Bb4

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 d5).

5.c4 0–0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0–0 5.e3 d5).

5.c4 Nc6 6.Bb2 0–0 7.cd5 Nd5 8.Nf3 Re8 9.Be2 Qe7 10.0–0 Bg4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 Nc6 5.Bb2 0–0 6.e3 d5 7.cd5 Nd5 8.Nf3 Re8 9.Be2 Bg4 10.0–0 Qe7).

5.f4 0–0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0–0 5.f4 d5).

5.Nf3

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.Nf3 d5 5.e3).

5...Nc6 6.Bb2 0–0 7.Be2 Bg4 8.0–0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0–0 7.Nf3 Re8 8.0–0 Bg4).

5...Nc6 6.Bb2 Bf5 7.Be2 0–0 8.0–0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0–0 7.Nf3 Re8 8.0–0 Bf5).

5...0–0

(--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0–0 5.Nf3 d5).

6.c4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0–0 5.e3 d5 6.Nf3).

6.c4 Be7 7.Bb2 Nc6 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0–0 5.e3 d5 6.Nf3 Nc6 7.Bb2 Be7).

6.Be2 Nc6 7.Bb2 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0–0 7.Nf3).

6.Be2 Nc6 7.Bb2 Bg4 8.0–0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0–0 7.Nf3 Re8 8.0–0 Bg4).

4.Be5 Nc6

5.Bb2 Bb4 6.Nf3 Bg4 7.Be2 0–0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6. Be2 0–0 7.Nf3 Bg4).

5.Bb2 Nb4 6.a3 Nc6 7.Nf3 (--> 1.b4 e5 2.Bb2 d5 3.Be5 Nc6 4.Bb2 Nb4 5.a3 Nc6 6.Nf3 Nf6 7.e3).

5.Bb5 Bb4 6.Nc3 =.

5.Bb5 Bb4 6.Bc6 bc6 7.Nf3 Ba6 (7...0–0!?=) 8.Nd4+= Bb5? (better is 8...Bb7+=) 9.a4+– (9.Nb5?! cb5 10.a4 ba4+=) 9...Qe7 (9...Nd7 10.Bg7 (worse is 10.ab5 Ne5 11.f4 Nc4+/–) 10...Rg8 11.ab5 Rg7 12.c3+– (worse is 12.Nc6 Qf6+/–)) 10.f4 (better is 10.Bf6 Qf6 11.ab5 cb5 12.c3+–) 10...Ba6 11.Nc6 Qc5 12.Nb4 Qb4 13.Bc7 (13.Nc3 c6+–) 13...0–0 (13...Rc8 14.Be5+–) 14.Be5+– Ne4 15.Qg4 g6 16.f5 (better is 16.Nc3+–) 16...f6? (better is 16...Bc8+/–) 17.Bc3+– Qe7 18.fg6 hg6 19.Qg6 Kh8 20.Qh5 Kg7 21.Bd4 Rac8 22.c3 Bc4 23.Na3 Bd3 24.Qd5 Rfd8 25.Qf5 Nc5 26.Qg4 Kf8 27.Qh4 Rc6 28.Qh6 Ke8 29.Qh5 Kd7 30.Nb5 a6 31.Qd5 Rd6 32.Nd6 Qd6 33.Qc5 Qc5 34.Bc5 f5 35.0–0–0 Rb8 36.Bb4 a5 37.Rhe1 ab4 38.Kb2 b3 39.a5 Bc2 40.Ra1 Kc6 41.a6 Ra8 42.Ra5 Kb6 43.Rea1 Ra7 44.d4 Kc6 45.c4 Kd6 46.Kc3 Ke6 47.Rb5 Kf6 48.Rb7 Ra6 49.Ra6 Kg5 50.Rab6 Be4 51.Rg7 Kh5 52.Rh7 Kg5 53.h4 Kg4 54.Rg6# 1–0. Yannick – Jule, playchess.de, 2006.

5.Bb5 Bd7 6.Bc6+= Bc6 7.a3 Bd6 8.Nf3 0–0 9.Nc3 Be5 10.Ne5 Re8 11.d4 Ne4 12.Ne4+– de4 13.Nc6 bc6 14.Qg4 Rb8 15.0–0 Qf6 16.f3 ef3 17.Rf3 Qe6 18.Qe6 Re6 19.Re1 Rbe8 20.Kf2 g6 21.g4 Kg7 22.h3 Re4 23.c3 R8e6 24.Ke2 h6 25.Kd3 Rd4?? 26.cd4 (26...a6 27.e4+–; 26.ed4?! Re1 27.Kc4 f6+/–) 1–0. mtra – jerrykr, Internet, 2002.

5.Bb5 Bd7 6.Bf6 Qf6 7.c3 Ne5 (7...Bb4!? 8.Qb3 Be7=) 8.Bd7+= Kd7 9.d4 Nc4 10.Nf3 Re8 11.0–0 Kc8 12.Qa4 Bd6 (12...Re6!?+/–) 13.Qa7+– b6 (13...c6+–) 14.Qa8 Kd7 15.Qd5 Nb2 (15...Qe6 16.Qb5 c6 17.Qa6+–) 16.Qb3 Nd3 17.Nbd2 (17.Qc2 Qg6 18.Rd1 Nf2 19.Qf2 Qe4+–) 17...Re7 (17...Kd8 18.Qb1 Qg6 19.Nc4+–) 18.Qc2 (better is 18.e4 Rhe8 19.Qa4 Kd8+–) 18...Nf2 (18...Qg6 19.Rfd1 b5+–) 19.Rf2 Re3 (19...Kc8 20.a4 Re3 21.Ne5+–) 20.Nc4 Rf3 21.Rf3 (21.Rf3 Qe6 22.Qa4 Kd8 23.Nd6 cd6 24.Rf7 Qf7 25.Qa8 Ke7 26.Qb7 Kf8 27.Qc8 Qe8 28.Rf1 Ke7 29.Re1 Kf6 30.Re8 Re8 31.Qe8+–) 1–0. Hal1958 – RookedRalph, playchess.de, 2004.

3.e3 Be6

4.Nf3 c5 5.bc5+= Nbd7 6.Nd4 Nc5 7.Ne6 fe6 8.Bd4 Nfd7 9.Bb5 Qc7 10.Qh5 g6? 11.Qh3 e5 12.Bc5 0–0–0 13.Ba7 Qc2 14.Na3 Qf5 15.Rc1 (15...Nc5 16.Rc5#) 1–0. miehnekort – meeheal, Yahoo, 2005.

4.Nf3 Bg4!? =.

4.Nf3 g6

5.Nc3 Bg7 A) 6.Nd4 Bd7 (6...0–0 7.Ne6 fe6 8.d4 Nc6 9.b5 Na5 10.Bd3 Qd6 11.0–0 Nc4; 6...a5 7.b5 0–0 8.Ne6 fe6 9.Bd3 Nbd7 10.Ba3 Ne5 11.0–0 Ne8) 7.Be2 0–0 8.b5 c5 9.Nb3 Qc7 10.h4 Be6 11.h5 gh5; B) 6.Be2 0–0 (6...a5 7.b5 0–0 8.0–0 Qd6 9.a4 Qb6 10.Ng5 Nbd7 11.d4 Bf5; 6...a6 7.Na4 Nc6 8.Nc5 0–0 9.Rb1 Bc8 10.Ne5 Qd6 11.Ncd3 a5; 6...Ne4 7.Ne4 Bb2 8.Nc5 Ba1 9.Nb7 Qc8 10.Qa1 0–0 11.Nc5 Nd7; 6...Nc6 7.b5 Na5 8.0–0 0–0 9.Nd4 Qd6 10.Ne6 fe6 11.d3 a6) 7.0–0 a6 8.Ng5 Bd7 9.a3 Nc6 10.d4 Bf5 11.Qd2 Qd6; C) 6.Ng5 Bf5 (6...0–0 7.Ne6 fe6 8.d4 Nc6 9.b5 Na5 10.Bd3 Nc4 11.Bc4 dc4; 6...Bc8 7.Be2 0–0 8.0–0 Nc6 9.b5 Na5 10.Ba3 a6 11.ba6 b6; 6...a5 7.Ne6 fe6 8.b5 0–0 9.d4 Qd6 10.Be2 Nbd7 11.0–0 Nb6) 7.Bd3 Bd3 8.cd3 Nc6 9.0–0 0–0 10.Qb3 a5 11.b5 Nb4; D) 6.Na4 a5 (6...0–0 7.Nc5 Bc8 8.Be2 Nbd7 9.Nd3 a5 10.a3 Ne4 11.Bg7 Kg7; 6...b6 7.Bb5 Bd7 8.Bd7 Qd7 9.Nc3 0–0 10.0–0 Ne4 11.Rb1 Bc3; 6...Nc6 7.Nc5 0–0 8.b5 Na5 9.Ne6 fe6 10.Bc3 Nc4 11.Bc4 dc4) 7.Nc5 ab4 8.Nb7 Qc8 9.Nc5 0–0 10.a3 ba3 11.Ra3 Ra3; E) 6.Ne2 0–0 (6...Nc6 7.b5 Na5 8.Bc3 Nc4 9.Nf4 0–0 10.Bc4 dc4 11.Qe2 Bd5; 6...a6 7.Ned4 Nc6 8.Ne6 fe6 9.a4 Nb4 10.Rb1 Nc6 11.Bf6 Bf6; 6...a5 7.a3 0–0 8.Nf4 Bg4 9.h3 Bf3 10.Qf3 Qd6 11.c4 Nbd7; 6...Qc8 7.Nf4 0–0 8.h4 Bg4 9.Bf6 Bf6 10.Nd5 Nc6 11.Nf6 ef6) 7.Nf4 a5 8.a3 Na6 9.Ne6 fe6 10.Qb1 c6 11.h4 ab4.

5.c4 Bg7 A) 6.cd5 Bd5 7.Qa4 Nbd7 8.Nc3 0–0 9.Be2 Nb6 10.Qc2 Qd6 11.Rb1 Bc4; B) 6.Nc3 0–0 7.Nd4 Nc6 8.Ne6 fe6 9.b5 Na5 10.cd5 Ne4 11.Ne4 Bb2; C) 6.Ng5 0–0 (6...a5 7.b5 Bf5 8.Nc3 0–0 9.cd5 h6 10.Nf3 Nd5 11.d4 Qd6; 6...a6 7.Ne6 fe6 8.Nc3 0–0 9.d4 Nc6 10.a3 e5 11.de5 Ne5; 6...Bf5 7.cd5 0–0 8.Bc4 a5 9.ba5 Ra5 10.Qb3 Nbd7 11.Qb4 b6) 7.Nc3 Bf5 8.cd5 h6 9.e4 Bg4 10.f3 hg5 11.fg4 Ne4; D) 6.Nd4 0–0 7.Ne6 fe6 8.d4 Nc6 9.b5 Na5 10.Nd2 c6 11.c5 cb5; E) 6.Qa4 Nbd7 7.cd5 Bd5 8.Nc3 0–0 9.Be2 Nb6 10.Qc2 Qd6 11.a3 c6.

5.Nd4 Bd7 A) 6.Nc3 Bg7 (6...e5 7.Nf3 e4 8.Ne5 Bb4 9.Nd7 Qd7 10.Nd5 Qd5 11.Bf6 0–0) 7.Be2 0–0 8.b5 c5 9.Nb3 Qc7 10.d4 c4 11.Nc5 Be8; B) 6.Qf3 Bg7 7.Nc3 e5 8.Nb3 e4 9.Qd1 0–0 10.b5 a6 11.a4 ab5; C) 6.b5 e5 (6...Bg7 7.Nc3 0–0 8.Be2 c5 9.Nb3 Qc7 10.d4 c4 11.Nc5 Be8; 6...a6 7.Nc3 Bg7 8.a4 0–0 9.Be2 c5 10.Nb3 Qc7 11.0–0 Be6) 7.Nb3 Bd6 8.c4 a6 9.d4 dc4 10.de5 Bb4 11.N3d2 Ne4; D) 6.f4 Nc6 (6...Bg7 7.Nc3 0–0 8.b5 c5 9.Nb3 Qc7 10.Be2 a6 11.0–0 ab5; 6...e6 7.b5 a6 8.g4 h6 9.a4 g5 10.f5 ef5 11.Nf5 h5; 6...Bh6 7.Nc3 0–0 8.Bd3 Nc6 9.Nc6 bc6 10.0–0 a5 11.b5 cb5; 6...Na6 7.b5 Nc5 8.Nc3 Bg7 9.Be2 0–0 10.0–0 Re8 11.Qe1 Bg4) 7.Nc6 bc6 8.Nc3 Bg7 9.Bd3 0–0 10.0–0 Rb8 11.a3 a5; E) 6.c4 e5 (6...dc4 7.Bc4 Bg7 8.Nc3 0–0 9.0–0 Nc6 10.Nc6 Bc6 11.b5 Bd7; 6...Bg7 7.cd5 Nd5 8.Qb3 Nb6 9.Nf5 gf5 10.Bg7 Rg8 11.Bc3 Ba4) 7.Nf3 e4 8.Ne5 Bd6 9.cd5 0–0 10.Bc4 Qe7 11.d4 ed3.

5.Nd4 Bg7 A) 6.Ne6 fe6 7.Nc3 0–0 8.f4 Nc6 9.b5 d4 10.Na4 Nb4 11.Bd4 Ne4; B) 6.h4 0–0 (6...Bd7 7.Nc3 0–0 8.h5 e5 9.Nf3 Nh5 10.Nd5 Be6 11.c4 c6; 6...Nc6 7.Ne6 fe6 8.b5 Na5 9.Bd3 0–0 10.0–0 Qd6 11.Ba3 Qd7; 6...Qd7 7.Nc3 Nc6 8.Bb5 0–0 9.0–0 a5 10.ba5 Ra5 11.Nb3 Ra7; 6...Na6 7.h5 Nb4 8.Ne6 fe6 9.h6 Bf8 10.Be5 a6 11.Nc3 Nc6) 7.Nc3 Nc6 8.Ne6 fe6 9.b5 Na5 10.d4 Qd6 11.Rb1 h5; C) 6.Be2 Bd7 (6...0–0 7.0–0 Bd7 8.Nb3 a6 9.Nc3 Nc6 10.Nc5 Nb4 11.Ba3 a5; 6...Na6 7.Ne6 fe6 8.a3 0–0 9.d4 Ne4 10.0–0 Nb8 11.Nd2 Nd6; 6...Nc6 7.Ne6 fe6 8.b5 Na5 9.0–0 0–0 10.f3 Nd7 11.Qc1 c5) 7.Nc3 0–0 8.b5 c5 9.Nb3 Qc7 10.d4 c4 11.Nc5 Be8; D) 6.g3 0–0 (6...Bd7 7.Nc3 0–0 8.b5 e5 9.Nf3 Re8 10.Na4 a6 11.Nc5 ab5; 6...Bg4 7.Be2 Bh3 8.Bf1 Bf1 9.Kf1 0–0 10.Kg2 Nbd7 11.Nc3 Ne5) 7.Nc3 Bg4 8.Be2 Bh3 9.Nf3 Ne4 10.Qb1 Bf6 11.Ne4 de4; E) 6.Nc3 Bd7 (6...0–0 7.Ne6 fe6 8.d4 Qd6 9.a3 a5 10.b5 Nbd7 11.Be2 e5; 6...a5 7.b5 0–0 8.Be2 Qd6 9.h4 h5 10.Ne6 Qe6 11.0–0 Nbd7; 6...a6 7.Ne6 fe6 8.Bd3 Nc6 9.a3 0–0 10.0–0 a5 11.b5 Ne5) 7.h4 Na6 8.Ba6 ba6 9.Qe2 Qb8 10.Rb1 Qb4 11.Qa6 Qb6.

5.Be2 a6 A) 6.Nc3 Nc6 (6...Bg7 7.Na4 Nc6 8.Nc5 0–0 9.a3 Bc8 10.Ne5 Qd6 11.Nc6 Qc6) 7.Na4 b6 8.Ng5 Bf5 9.a3 Bg7 10.Bd3 h6 11.Nf3 Bd7; B) 6.Ng5 Nc6 (6...Bg7 7.Ne6 fe6 8.0–0 Qd6 9.c3 Nbd7 10.d4 a5 11.b5 e5; 6...Bf5 7.g4 Bc8 8.c4 h6 9.Nf3 dc4 10.Ne5 Nc6 11.Nc6 bc6; 6...Bh6 7.Ne6 fe6 8.0–0 Nc6 9.a3 Qd6 10.d4 0–0 11.Nd2 e5) 7.Ne6 fe6 8.0–0 Nb4 9.c3 Nc6 10.d4 Bg7 11.Qb3 Qd7; C) 6.Nd4 Bd7 (6...Nc6 7.Ne6 fe6 8.a3 Qd6 9.Nc3 Bg7 10.d4 0–0 11.f4 Qd7; 6...Bg7 7.Ne6 fe6 8.0–0 0–0 9.d4 Qd6 10.a3 a5 11.Nc3 Nbd7; 6...Qd6 7.Ne6 Qe6 8.Nc3 Bg7 9.0–0 0–0 10.d4 Nbd7 11.Qd2 Qd6; 6...Qd7 7.c4 dc4 8.Ne6 Qe6 9.Na3 b5 10.d3 Qd6 11.dc4 Qb4; 6...Bh6 7.Ne6 fe6 8.a3 0–0 9.Nc3 Nc6 10.d4 Qd6 11.f4 Bf4) 7.c4 dc4 8.Bc4 Bg7 9.Nc3 0–0 10.0–0 Nc6 11.Nc6 Bc6; D) 6.0–0 Nc6 (6...Bg7 7.Ng5 Bf5 8.c4 0–0 9.Nc3 h6 10.Nf3 Nc6 11.cd5 Nd5) 7.Nd4 Nd4 8.Bd4 Bg7 9.Nc3 0–0 10.Bf3 Qd6 11.Bc5 Qd7; E) 6.c4 Bg7 (6...Nc6 7.cd5 Bd5 8.Nc3 Bg7 9.0–0 0–0 10.a3 Be6 11.d4 Bf5; 6...dc4 7.Ng5 Bd5 8.e4 h6 9.ed5 hg5 10.Nc3 Nbd7 11.Ne4 Nb6; 6...Bh6 7.cd5 Bd5 8.Nc3 Nc6 9.Nd5 Qd5 10.Nd4 Nd4 11.Bd4 e5) 7.Nc3 0–0 8.Qb3 Nc6 9.0–0 b5 10.Nd5 bc4 11.Nf6 Bf6.

5.Be2 Na6 A) 6.Bf6 ef6 7.a3 Bd6 8.Nc3 0–0 9.0–0 Nb8 10.Nd4 Nc6 11.Ne6 fe6; B) 6.c4 dc4 7.Na3 Bg7 8.Nc4 0–0 9.a3 c5 10.Qa4 cb4 11.ab4 Rc8; C) 6.Bb5 c6 (6...Bd7 7.Ba6 ba6 8.Bf6 ef6 9.Nc3 c6 10.a3 a5 11.b5 Bc5) 7.Ba6 ba6 8.Qe2 a5 9.Bf6 ef6 10.b5 c5 11.Nc3 Be7; D) 6.a3 Bg7 (6...Bh6 7.Nc3 0–0 8.0–0 c5 9.Ba6 ba6 10.bc5 Qa5 11.d4 Rab8; 6...c6 7.0–0 Bg7 8.Bd4 0–0 9.Nc3 Ne4 10.Bg7 Kg7 11.Ne4 de4) 7.Bd4 Nb8 8.b5 a6 9.ba6 Na6 10.Nc3 0–0 11.h4 b6.

5.Be2 Bg7 6.0–0 (6.Nc3 0–0 (6...a5 7.b5 0–0 8.Nd4 Qd6 9.h4 h5 10.a4 Qb6 11.0–0 Nbd7; 6...Nc6 7.b5 Na5 8.0–0 0–0 9.Nd4 Qd6 10.f4 Rfd8 11.a4 Qb6) 7.0–0 a6 8.Nd4 Bd7 9.Nb3 Nc6 10.Nc5 Nb4 11.Ba3 a5; 6.Nd4 Bd7 (6...0–0 7.Ne6 fe6 8.0–0 Nc6 9.b5 Na5 10.f3 c5 11.bc6 Nc6; 6...Na6 7.Ne6 fe6 8.a3 0–0 9.d4 Ne4 10.0–0 c6 11.Nd2 Nd6; 6...Qc8 7.b5 c5 8.Ne6 Qe6 9.Nc3 Nbd7 10.0–0 0–0 11.d4 Rac8; 6...Qd7 7.Nc3 Nc6 8.Ne6 Qe6 9.b5 Na5 10.0–0 Nc4 11.Bc4 dc4; 6...Nc6 7.Ne6 fe6 8.b5 Na5 9.d4 Nc4 10.Bc4 dc4 11.0–0 a6) 7.Nc3 0–0 8.b5 c5 9.Nb3 Qc7 10.0–0 Be6 11.f4 Nbd7; 6.Ng5 Bf5 (6...0–0 7.Ne6 fe6 8.0–0 Nc6 9.b5 Na5 10.f3 c5 11.bc6 Nc6; 6...Bd7 7.Nc3 0–0 8.b5 Bf5 9.0–0 a6 10.a4 ab5 11.ab5 Ra1) 7.b5 0–0 8.Nc3 a6 9.a4 c5 10.Bd3 Bd3 11.cd3 d4) 6...0–0 (6...a6 7.Nd4 0–0 8.Ne6 fe6 9.d4 Qd6 10.a3 Nbd7 11.Nd2 b5; 6...Nc6 7.b5 Na5 8.Nd4 0–0 9.Ne6 fe6 10.f3 c5 11.Nc3 d4; 6...a5 7.b5 Nbd7 8.Ng5 Nc5 9.Nc3 Bf5 10.g4 Bc8 11.d4 Ne6) 7.d3 (7.Nd4 Bd7 8.Nc3 Nc6 9.Bf3 e5 10.Nc6 bc6 11.Na4 Qe7) 7...Qd6 (7...Na6 8.Ba3 Ne4 9.Nd4 c5 10.bc5 Nec5 11.Nd2 Qa5) 8.a3 Bg4 (8...a6 9.Be5 Qd7 10.Bd4 Nc6 11.Nc3 Nd4) 9.Nbd2 Nbd7 (9...Nc6 10.b5 Na5 11.Be5 Qb6) 10.e4 (10.h3 Bf5 11.Nd4 a5) 10...de4 (10...Ne4 11.Bg7 Nd2) 11.Ne4 (11.de4!? Bf3 12.Bf3=) 11...Ne4+= 12.Bg7 Nf2 13.Rf2 Kg7 14.Ng5 Be2 15.Qe2 Qd4 16.Raf1 h6 (better is 16...Ne5=) 17.Qe7?? (better is 17.c3 Qb6 18.Qe7+/–) 17...hg5–+ 18.Kh1? (18.c3 Qd5 19.Rf5 Qe6 (worse is 19...gf5 20.Qg5 Kh7 21.Rf4 Qg2 22.Kg2 Nf6 23.Rh4 Nh5 24.Rh5) 20.Qg5 Rae8–+) 18...Qd5 (better is 18...Qf2! 19.Rf2 Rae8 20.Qe2 Re2 21.Re2–+) 19.c4 Qd3?? (better is 19...Qe6 20.Qg5 Rae8–+) 20.Rf7 Kg8 (20...Rf7 21.Rf7 Kg8 22.Rg7 Kh8 23.Rh7 Kg8 24.Qg7) 21.Rg7 Kh8 22.Rh7 Kg8 23.Qg7 1–0. Kaczmarczyk,Przemyslaw – Bota,Rafal, OMTSz Poland, 2010.

5.Be2 Bh6 A) 6.Nc3 a6 (6...0–0 7.0–0 Nc6 8.b5 Na5 9.Nd4 Qd6 10.f4 Nc4 11.Bc4 dc4; 6...a5 7.b5 Qd6 8.a4 Nbd7 9.Ba3 Qb6 10.Nd4 Nc5 11.0–0 Rd8; 6...Na6 7.a3 0–0 8.Rb1 Nb8 9.h4 Nc6 10.h5 g5 11.b5 Na5; 6...Nc6 7.b5 Na5 8.Nd4 Qd6 9.0–0 0–0 10.f4 Nc4 11.Bc4 dc4) 7.Nd4 Qd7 8.Ne6 fe6 9.0–0 Nc6 10.a3 e5 11.d4 ed4; B) 6.0–0 0–0 (6...a5 7.b5 0–0 8.Nd4 Nbd7 9.Ne6 fe6 10.Nc3 Nc5 11.Ba3 Nce4; 6...Nc6 7.b5 Na5 8.Nd4 0–0 9.Ne6 fe6 10.Nc3 Qd6 11.a4 e5; 6...a6 7.Nd4 0–0 8.Ne6 fe6 9.a3 Qd6 10.Nc3 Nbd7 11.f4 c6; 6...Qc8 7.c4 dc4 8.Na3 c3 9.Bc3 0–0 10.Bc4 Nd5 11.Qb3 Rd8; 6...Na6 7.Ba3 Ne4 8.Nd4 Bg7 9.b5 Nb8 10.d3 Nd6 11.Ne6 fe6) 7.Nc3 a5 8.b5 c5 9.h4 Qd6 10.Ng5 a4 11.Ba3 Nbd7; C) 6.b5 a6 (6...Nbd7 7.0–0 0–0 8.Nd4 Nc5 9.Ba3 Nce4 10.Ne6 fe6 11.f3 Nd6) 7.Nd4 ab5 8.Ne6 fe6 9.Bb5 c6 10.Bd3 0–0 11.Nc3 Nbd7; D) 6.h3 0–0 (6...a5 7.b5 0–0 8.Nd4 Bc8 9.Nc3 c5 10.Nf3 a4 11.a3 Be6) 7.0–0 a6 8.a3 Nc6 9.Nd4 Bd7 10.Nc6 Bc6 11.Bd4 Qd6; E) 6.Nd4 Bd7 (6...Qd7 7.b5 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 0–0 11.h4 Qd6; 6...0–0 7.h4 Bd7 8.h5 g5 9.Nb3 a6 10.Bf6 ef6 11.Nc3 Nc6; 6...a5 7.b5 Nbd7 8.Nc3 0–0 9.Ne6 fe6 10.Ba3 Bg7 11.d4 Nb6; 6...Bc8 7.Nc3 0–0 8.0–0 Nc6 9.Nc6 bc6 10.Na4 a5 11.a3 Bf5; 6...a6 7.Ne6 fe6 8.0–0 Nc6 9.a3 0–0 10.d4 Qd6 11.Nd2 e5) 7.Nc3 0–0 8.Nb3 a6 9.h4 Nc6 10.h5 g5 11.a3 b6.

3.e3 Bf5

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6).

4.b5 c5 5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5).

4.c4 Nbd7 5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

4.d3 e6 5.a3 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d3).

4.d4 e6 5.a3 c6 6.Nf3 Nbd7 7.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

4.Be2 c6 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2).

4.Be2 Nbd7 5.Nf3 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

4.Nf3 c6 5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.Nf3 Nc6 5.a3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nc6).

4.Nf3 h6 5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

4.f4 g6 5.Nf3 Bg7 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 Bf5).

4.a3 Nbd7

5.c4 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.Nf3 e6 6.Be2 Bd6 7.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2 Bd6).

4.a3 e6

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.Nf3 c6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

4.b5 e6

5.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6 5.b5).

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5).

5.Nf3 h6 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6).

4.c4 dc4

5.Bc4 Nbd7 6.b5 e6 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

5.Bc4 Nbd7 6.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

5.Bc4 e6

6.a3 c5 7.b5 Nbd7 8.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6 7.a3 c5 8.b5).

6.a3 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6 7.a3).

6.b5 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4).

6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6).

6.Nf3 Nbd7 7.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3).

4.c4 c6

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.c4).

5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.c4 Nc6

5.a3 e6 6.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6 5.c5 Nc6 6.a3).

5.a3 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nc6 6.a3).

4.c4 e6

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 e6).

5.a3 c5 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 c5 6.c4).

5.a3 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 Nbd7 6.d4 c6 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

5.a3 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.Nf3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.b5 dc4 6.Bc4 Nbd7 7.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7 7.b5).

5.b5 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.b5 Nbd7 6.Nf3 c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4 Nbd7).

5.b5 Nbd7 6.Nf3 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.c4).

5.b5 Be7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.c4).

5.c5 c6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5).

5.c5 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5).

5.c5 Be7 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 Be7).

5.Nf3

5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4).

5.Nf3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

5.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.Nf3 Nbd7 6.a3 c5 7.bc5 dc4 8.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.a3 Nbd7 7.Nf3 c5 8.bc5).

5.Nf3 Nbd7 6.a3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.Nf3 Nbd7 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.Nf3 Nbd7 6.c5 Be7 7.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2 Be7).

4.Nf3 Nbd7

5.a3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 e6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 Nbd7).

5.c4 c5 6.b5 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4 Nbd7).

5.c4 c6 6.c5 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.c4 e6 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.d4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

5.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 Nbd7).

5.Be2 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

5.Be2 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

5.Be2 e6 6.b5 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 TESTC800 5.b5 Nbd7 6.Be2 Bd6).

4.Nf3 e6

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6).

5.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

5.a3 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

5.a3 Bd6 6.c4 c6 7.d4 Nbd7 8.Nbd2 0–0 9.h3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.d4 Nbd7 7.c4 c6 8.h3 0–0 9.Nbd2).

5.a3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.c4 a5 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 a5 7.a3).

5.a3 Nbd7 6.c4 dc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 dc4).

5.a3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.a3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.a3 Be7 6.c4 dc4 7.Bc4 Bd3 8.Qb3 Bc4 9.Qc4 Nc6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nc6 6.a3 dc4 7.Bc4 Bd3 8.Qb3 Bc4 9.Qc4 Be7).

5.a3 Be7 6.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3 Be7).

5.b5 c6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

5.b5 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.b5 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.b5 Nbd7 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3).

5.b5 Nbd7 6.d4 Bd6 7.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6 7.d4).

5.b5 h6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 h6).

5.b5 h6 6.Be2 Be7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.Be2 h6).

5.c4 dc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4).

5.c4 dc4 6.Bc4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 Nbd7 6.Nf3 e6).

5.c4 c5 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4).

5.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7).

5.c4 Nbd7 6.a3 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 Nbd7 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

5.c4 Nbd7 6.c5 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.c4 Nbd7 6.c5 Be7 7.Be2 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7 7.Be2 Be7).

5.c4 Be7 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.c4).

4.f4 e6

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 e6 4.f4 Nf6).

5.b5 c5 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nd7 4.f4 e6 5.Nf3 Ngf6 6.b5 c5).

3.e3 Bg4

4.Bb5 A) 4...Bd7 5.Be2 (5.Bd3 e5 6.Be5 Nc6 7.Nf3 Ne5 8.Ne5 Bb4=) 5...e6 6.a3 Bd6 7.Nf3 0–0 8.0–0 a5=; B) 4...c6 5.f3 (5.Be2 Be2 6.Ne2 e6 7.Bc3 Bd6 8.0–0 0–0+=) 5...Bf5 6.Be2 Qd6 7.g4 Bg6 8.a3 h6+=; C) 4...Nbd7 5.f3 Bh5 6.g4 Bg6 7.h4 h6 8.h5 Bh7+=.

4.Be2 Qc8 5.b5 c6 6.a4 cb5 7.ab5 a6 8.Nf3 Nbd7 9.0–0 g6 10.d3 Bg7 11.Nbd2 0–0 12.h3 Bf3 13.Nf3 a5 14.Rc1 Re8 15.c4 dc4 16.dc4 Nc5 17.Qc2 Nfd7 18.Bg7 Kg7 19.Rfd1 e5 20.Nh4 h5 21.Bh5 Rh8 22.Nf5 gf5 23.Qf5 Nf6 24.Qg5 Kf8 25.Bg6 Rg8 26.Qf6 Rg6 27.Qh8 Rg8 28.Qh6 Rg7 29.Qd6 Kg8 30.Qe5 Qh3 31.Qg7 1–0. Poetzsch – Bortolin, 1969.

4.Be2 Qd7 5.a3 (5.Bg4 Ng4 6.Nf3 f6 7.Nc3 e5 8.a3 a5=) 5...Bf5 6.Nf3 e6 7.Nh4 Bg6 8.0–0 c5 =.

4.Be2 Nbd7?? 5.Bg4+– h6 6.Be2 e6 7.a3 Qe7 8.Nf3 0–0–0 9.d4 Ne4 10.Nbd2 g5 11.Bd3 f5 12.Ne5 Qf6 Black intends f4 13.Nd7 Rd7 14.Nf3 f4 15.Be4 de4 16.Ne5 fe3 17.fe3 Re7 18.Rf1 Qg7 19.Qg4 h5 20.Qe4 Qh7 21.Qh7 Reh7 22.0–0–0 Bh6 23.Rde1 g4 24.Rf7 Bg7 25.c4 25...Be5 26.Rh7 Rh7 27.de5 Rf7 28.Re2 1–0. Fournier,Frederic – Guest3424738, Partie amicale, 6m + 2s, 2008.

4.Ne2 Qd6 5.a3 (5.f3 Bd7 6.Nf4 e5 7.Nd3 e4 8.Nc5 Bc6=) 5...e5 6.h3 Bh5 7.d4 Nbd7 8.de5 Ne5 =.

4.Ne2 e5 5.Be5 Bb4 6.c3 Be7 7.Qa4 Bd7 8.Qf4 c5 =.

4.Ne2 e6 5.a3 (5.f3 Bf5 6.g4 Bg6 7.Nf4 Bd6 8.h4 e5=) 5...Bd6 6.f3 Bf5 7.Nd4 Bg6 8.Nb5 e5 =.

4.f3 Bd7 5.a3 (5.g4 h6 6.a3 e6 7.f4 a5 8.b5 Ne4–/+) 5...e6 6.Nc3 Bd6 7.Nb5 Bb5 8.Bb5 Nbd7 +=.

4.f3 Bf3?? 5.Qf3 Nc6 6.a3 e6 7.c4 Be7 8.cd5 ed5 9.Bb5 0–0 10.Nc3 Ne5 11.Qf2 Nfg4 12.Qe2 c6 13.Bd3 Nd3 14.Qd3 f5 15.Nf3 Rc8 16.h3?? Nh6? 17.Ne2 Qc7 18.Nf4 Bd6? 19.Ne6 Bg3 20.Ke2 Qe7 21.Nf8 Rf8 22.Qd4 b6 23.Ne5 Qb7 24.Nc6! f4 25.Qd5 Kh8 26.Ne5 Qd5–+ (27.Rhc1 Qg2 28.Kd3 fe3 29.de3 Rd8 30.Bd4 Be5–+) 0–1. Nautiluschess – rusalka, ICS blitz, 2001.

4.Be2 Be2

5.Qe2 a6 6.Nf3 =.

5.Qe2 Qd6 6.Qb5 Nc6 7.a3 = (< 7.Qb7 Rb8 8.Qa6 Nb4 9.Qd6 cd6 –/+).

5.Qe2 Nbd7 6.Nf3 e6 7.a3 a5 8.b5 Bd6 9.c4 c5 10.0–0 dc4 (10...0–0 11.a4=) 11.Qc4 Nb6 12.Qc2 Qd7 (12...0–0 13.d3=) 13.a4+= Nbd5 14.Na3 Nb4 15.Qb1 0–0 16.Nc4 Be7 (16...Bc7 17.b6 Bd8 18.Nfe5+=) 17.d4 (17.Nb6 Qd3 18.Na8 Ra8+–) 17...cd4 (17...Nfd5 18.e4 Nf4 19.Nb6+/–) 18.Bd4 (18.Nb6 Qd8 19.Na8 de3 20.fe3 h6+/–) 18...Nfd5 19.Rd1 f6 (19...Rfc8!? 20.Qb3 Qc7+/–) 20.e4+– Nf4 21.Bf6! Ne2 (21...Bf6 22.Rd7 Discovered attack; 21...Rf6 22.Rd7 Discovered attack; 21...gf6 22.Rd7 Discovered attack) 22.Kf1+– (22.Kf1 Qc7 23.Be7 Qc4 24.Ne5+–) 1–0. Krivoshapko,Alexander – Bogachkova,Alena, 2013.

5.Qe2 Nbd7 6.Nf3 e6 7.b5 Bd6 =.

5.Qe2 Nbd7 6.f4 e6+= 7.a3 c5 8.bc5 Bc5 9.d4 (9.Nf3!?=) 9...Qb6 (9...Be7 10.Nf3–/+) 10.c4+= Be7 11.c5 Qb3 12.Bc1 (12.Nf3 Rc8–/+) 12...Ne4 (12...Rc8!? 13.Nf3–/+) 13.Nf3 Bf6 (13...0–0 14.0–0–/+) 14.Ne5 (better is 14.Nbd2!? Qa4 15.Ne4 de4 16.Ne5=) 14...Ne5 15.fe5 Bh4 (15...Bg5 16.0–0 0–0 17.Re1–/+) 16.g3 Bg3 17.hg3 Ng3 18.Qh2? (18.Nd2 Qa4 19.Qg2 Nh1 20.Qg7–+) 18...Nh1–+ 19.Qh1 (19.Kd2 b6–+) 19...0–0 (19...Qc2 20.Nd2 Qc3 21.Rb1 Qe3 22.Kf1 Qd4 23.Qg1 Qd3 24.Ke1–+) 20.Qh3 Rae8 (20...b6 21.cb6 ab6 22.Nd2–+) 21.Nd2 Qc3 (21...Qc2 22.e4–/+) 22.Rb1–/+ f6 (22...b6 23.Bb2 Qd3–/+) 23.ef6 (better is 23.Kd1!? b6 24.cb6 ab6 25.Rb6 fe5 26.Rb3–/+) 23...Rf6–+ 24.Kd1 Qd3 (better is 24...Rg6!? 25.Bb2 Qd3–+) 25.Rb3–/+ (25.Rb7 Ref8 26.Ke1 Rf2 27.Rg7 Kg7 28.Qg3 Kh8 29.Qf2 Rf2 30.Kf2 Qc2–+) 25...Qa6 26.e4 (26.Qg3 Rf7+=) 26...de4 (26...Rf2 27.ed5 Qe2 28.Kc2 Qe4 29.Qd3 Qd5 30.Kb1+=) 27.Ne4 Rf1 28.Kc2?? (28.Kd2 Ref8 29.Qd3–/+) 28...Qc4 (better is 28...Qe2 29.Nd2 Qd1 30.Kd3 Rh1–+) 29.Qc3+= Qe2 30.Nd2 Rf7 31.Qd3= Qf2 32.Qe3 Qf6 33.Bb2 Qg6 34.Qe4 Qh5 35.Rb7+= Rb7 36.Qb7 Qf5 37.Ne4 Qd5 38.Qd5+/– ed5 39.Nd6 Re7 40.Bc1 h6 41.Kd3 Kf8 42.Bf4 Re1?? 43.Nf5 Ra1 44.Bd6+– Kf7 45.Be5 Ra3 46.Kc2 h5 47.Kb2?? Ra6= 48.Ng7 h4 49.Nf5 h3 50.Ne3 Ke6 51.Ng4 Kf5 52.Nh2 Rg6+= 53.Ka3 Re6 54.Bc7 Ke4 55.Kb4? Kd4–+ 56.Bd6 Ke4 57.Kb5 d4 58.c6 Re8 59.Ng4? Rh8?? 60.c7= d3 61.Nf2 Ke3 62.Nd3?? Kd3–+ 63.Ka6 Kc4 64.Be5 Re8 65.Bf6 Rc8 66.Be5 Kd5 67.Kb7 Rc7! 68.Bc7 a5! 0–1. Tagirov,Kajum K (1900) – Zagidullin,Valery, Championship Ufa, 2012.

5.Ne2 Nbd7 6.0–0 e6 7.a3 c6 8.d3 Qc7 9.Nd2 Bd6 10.Nf3 0–0–0 11.Ng3 h5 12.c4 h4 13.Ne2 Rdg8 (13...dc4 14.dc4 Ng4 15.h3=) 14.c5 (14.cd5!? ed5 15.b5+=) 14...Be7= 15.h3 (15.Qa4 Kb8=) 15...g5+= 16.Nh2 Ne5 Black plans g4 (16...g4!? 17.hg4 h3–/+) 17.Be5 Qe5 18.Nd4 (better is 18.d4 Qe4 19.Nc3=) 18...Kc7?? (18...g4 19.hg4 h3 20.g3+=) 19.Ndf3 (better is 19.Nhf3 Qd4 20.Nd4+–) 19...Qc3 (19...Qf5 20.Nd4 Qh7 21.Qa4 Qd3 22.Nc6 bc6 23.Qa7 Kd8 24.Nf3+/–) 20.d4 (20.Qb1 Nd7 21.Nd4+/–) 20...g4+= 21.hg4 Ng4 22.Ng4 Rg4 23.Ne5 Rg7 24.Qf3 h3–/+ 25.g3 f5 26.Qe2 Bf6 27.Qd3 Qd3 28.Nd3+= h2 29.Kg2 Kd7 30.Rh1 Rgh7 31.Nf4 Rh6+= 32.Nd3 e5 33.de5+= Bg7 34.f4 Ke6 35.Ne1+– b6 36.Rc1 Kd7 37.Nf3 Bf8 38.cb6 ab6 39.Rh2 Rh2 40.Nh2 Be7 41.Nf3 Ra8? 42.Rc3 c5 43.bc5 bc5 44.Ne1 c4 45.Nc2 Rb8 46.Nd4 Rb2 47.Kf3 Ra2 48.Nf5 Ba3 49.Nd4 Bb4 50.Rc2 Rc2 51.Nc2 Bd2 52.f5 c3 53.g4 Ke7 54.e4 d4 55.Nd4 1–0. Hal1958 – Kendo, playchess.de, 2005.

5.Qe2 c6

6.a3 e6 7.c4 Nbd7 8.cd5 cd5 9.Nf3 Bd6 10.Nc3 0–0 11.0–0 Rc8 12.Rac1 a6 13.Na4 Qe7 14.d4 a5 (14...Rc1 15.Rc1 Ne4 16.Nc5=) 15.ba5+= Rc1 16.Rc1 Ba3 17.Nc5 Bb2 (17...Bc5 18.dc5 Rc8 19.Qb5=) 18.Qb2+= Nc5 19.Rc5 Ne4 20.Rc1 h6 21.Ne5 Ra8 22.f3 Nd6 23.Qb4 Nf5 24.Qe7 Ne7 25.Rc7 Kf8? (better is 25...Nf5 26.g4 Ne3 27.Nf7 Ra5=) 26.Rb7+– f6 27.Rb8! Rb8 28.Nd7 Ke8 29.Nb8 Kd8 30.Na6 e5 31.de5 fe5 32.Nc5 Nc6 33.Ne6 Ke7+= 34.Ng7 Kf6 35.Ne8 Ke7+= 36.Ng7 Kf6 37.Nh5 Kg5 38.Ng3 Na5 39.Kf2 Nc4 40.Ne2 Kf6 41.h4 Nb6 42.g4 Nd7 43.f4 Nc5 44.Nc3 Ke6 45.f5+– Kd6 46.g5 hg5 47.hg5 d4 48.ed4 ed4+/– 49.Nb5 Ke5 50.g6 ½–½. Koester,Roman (1975) – Nagel,Bernhard (2110), Karl Mala mem op, 2004.

6.a4 Qb6 7.b5 Nbd7 8.Na3 (8.Nf3 e6=) 8...e5=+ 9.Nf3 Bd6 10.0–0 0–0 11.d4 Rfe8 12.c4 ed4 (better is 12...e4!? 13.Nd2 Qc7=+) 13.Bd4+= Be5?? (13...Qc7+=) 14.Qb2 (better is 14.Bb6 Ba1 15.Ra1 ab6 16.cd5 Nd5 17.Qc2+–) 14...Bd4= 15.Nd4 Ne5 16.cd5 cd5 17.Qb3 Rad8 18.Rad1 Ne4 19.Rfe1 (19.Nb1 Nc4=+) 19...Rc8 (19...Ng4 20.f3 Nc5 21.Qc3 Na4 22.Qb4 Ne3 23.Qa4 Nd1 24.Re8 Re8 25.Qd1=+) 20.f3 (20.Rf1!?=) 20...Nc3–/+ 21.Rd2 Qa5 22.Nb1?? (better is 22.Nf5–/+) 22...Nb1–+ (23.Rdd1 Nc3–+) 0–1. Meyer,C – Paust,Wolf Dieter, Bargteheide op, 1988.

6.a4 Nbd7 7.Nf3 e6 8.b5 Be7 9.0–0 Qc7 10.c4 Bd6 11.d4 Ne4 12.c5 Be7 13.Nbd2 Nd2 14.Nd2 0–0 15.e4 Qf4 16.g3 Qf6 17.e5 Qg5 18.f4 Qg6 19.Nb3 Rfc8 0–1. Tasis Montes,C – Javier Conejo,F, III–132, 1990.

6.a4 e6 7.b5 Bd6 8.Nf3 0–0 9.0–0 Nbd7 10.d3 Rc8 (10...Qc7 11.Nc3+=) 11.c4 Ng4 (11...dc4 12.dc4 Qc7 13.Rd1=) 12.g3 Be7 (12...Nc5 13.Nc3=) 13.Nbd2 Bf6 (13...h5 14.h3 Nh6 15.bc6 bc6 16.Rab1+=) 14.Nb3 (14.d4 Be7+=) 14...Bb2= 15.Qb2 Qf6 (15...dc4 16.dc4 Qc7 17.Rfd1=) 16.Qf6 gf6 (16...Ngf6 17.Kg2=) 17.Na5+= Rc7 (17...dc4 18.bc6 bc6 19.Nc4+=) 18.bc6 (18.d4 cb5 19.cd5 b4+/–) 18...bc6 19.Nd4 (19.d4 f5+=) 19...Nge5 (19...Rfc8 20.Ra3+=) 20.Rfd1+= a6 21.f4 Ng4 22.Re1 c5 23.Nf3 Rb8 24.h3 Nh6 25.Rab1 Nf5 26.Kf2 Nd6 27.Rb8+= Nb8 28.Rb1 Nc6 29.Rb6 Na5+= 30.Rd6 Rc6?? 31.Rd8+– Kg7 32.cd5 ed5 33.Rd5 Nb3 34.Ke2 Rc8? 35.Nd2 Nc1 36.Kd1 Na2 37.Ne4 c4 38.Rc5 Rd8 39.d4 Re8 40.Nd6 Re3 41.Nf5 Kg6 42.Ne3 Nc3 43.Kc2 White plans d5 43...Ne4 44.Rc4 Ng3 45.d5 Kg7 46.d6 Kf8 47.Rc8 Kg7 48.d7 (48.d7 Nf1 49.Nf1 f5 50.d8Q h6 51.Qf8 Kg6 52.Rc6 f6 53.Rf6 Kh5 54.Rh6#) 1–0. Starr,Albert Martin – Rudyak,Felix (1905), San Francisco Stamer mem, 2005.

6.c4 e6 7.a3 dc4 8.Qc4 Qd5 9.Qd5 cd5 10.Nc3 a6 11.Na4 Nbd7 12.Rc1 Bd6 13.Nf3 0–0 14.Nc5 Rab8 15.d4 Rfc8 16.Ke2 Nb6 17.Nd2 Rc6 18.f3 Nfd7 19.Ndb3 Bc5 20.dc5 Nc4 21.Rc2 Rbc8 22.Rd1 b6 23.e4 bc5 24.ed5 ed5 25.Rd5 Re6 26.Kf2 Ne3 (26...Ncb6 27.Rdd2 c4+–) 27.Rd7+/– Nc2 28.Nc5 (28.bc5?! Ne3=) 28...Ree8 29.Na6 Ne3 (better is 29...Red8!? 30.Rd8 Rd8=) 30.Nc5+/– Nc4 31.Bc1 Ne5 32.Rd5 Rcd8 33.Rd8 Rd8 34.Ke2 Nc6 35.Bb2 f6 36.Bc3 Ne7 37.a4 Nd5 38.Bd2 Rb8 39.b5 Rc8 40.Ne4 Re8 41.Kd3 Rd8 42.Kc2 f5 43.Nc3 Nb6 44.Bg5 Rc8 45.Kb3 h6 46.Bh4 Nc4 47.Be1 Kf7 48.Kb4 Nb2 49.Kb3 Nc4 50.Ne2 Ne5 (50...Ne3 51.g3+/–) 51.b6 Nd3 52.Bb4 Ke6 53.a5 Kd5 54.b7 Rb8 55.a6 1–0. Fekete,Albert (2345) – Samu,Gabor (2095), HUN–chT2 Toth, 2006.

6.c4 e6 7.a3 dc4 8.Qc4 Qd5 9.Qd5 Nd5 10.Nc3 Nd7 11.Nf3 Bd6 12.g3 0–0 13.e4 N5b6 14.d3 Rfd8 15.Ke2 Ne5 16.Ne1 Rd7 17.f4 Ng6 18.Ng2 f5 19.e5 Bc7 20.Ne3 Rad8 21.Rhd1 Ne7 22.Rac1 a6 23.Nc2 (23.Nc4 Nbd5=) 23...Ned5 24.Nd5 Nd5 (worse is 24...ed5 25.Bd4+/–; worse is 24...cd5 25.Bd4+=) 25.Nd4 Re8 26.Nb3 Bb6 27.d4 Kf7 28.Nd2 Rg8 29.Nc4 Bc7 30.Kf3 Ke8 31.Rc2 g5 32.Bc1 (32.fg5 Rg5 33.Bc1 Rg4=) 32...g4 33.Ke2 h5 34.Be3 Ne3 (34...h4 35.Kd3+= (worse is 35.gh4 Rh8–+)) 35.Ne3 Rh7 36.Nf1 h4 37.Kf2 (37.Ne3 Kd7+=) 37...Rgh8 38.Rdd2 Bb6 39.Rc4 Kd7 40.Kg2 Kc8 (40...hg3 41.hg3 Ke7 42.Kf2–/+) 41.Kf2 Kb8 42.Ke3 hg3 43.hg3 Rh1 44.Rf2? (better is 44.Rc1!?–/+) 44...Rg1–+ 45.Ke2 Rh3 46.a4 Rh8 (46...a5 47.b5–+) 47.Ke3 (47.a5 Bd8–/+) 47...Rgh1 (47...a5 48.ba5 Ba5 49.Ke2–+) 48.Rcc2 (48.Rc1 Ka7–/+) 48...Rd8 49.Rcd2 (49.Rc4 a5–/+) 49...Rg1 (49...a5!? 50.ba5 Ba5–+) 50.Rd1 c5 (better is 50...Rh8!?–/+) 51.bc5= Bc5 52.Rfd2 Ba7 53.Kf2 Rh1 54.Ke3 (54.Kg2 Rdh8=) 54...Rd5 55.Kf2 (55.Rd3 Ra5 56.Ra1 Rh7+=) 55...Rh3 (better is 55...Rh8!?–/+) 56.Kg2= Rh7 57.Ne3 Rd8 58.Rd3 (58.Nc4 Rdh8 59.Kf2 Rh2 60.Ke3 Rd2 61.Rd2 Kc7=) 58...Rhd7+= 59.Nc2 Rc7 60.Ne3 Rdc8 (60...Rh8 61.Nf1+=) 61.Kf1 (61.d5 Be3 62.Re3 Rc2 63.Kg1 ed5 64.Rd5 Rh8=) 61...Rc3 (61...Rh7!?+=) 62.Ke2= Rd3 63.Kd3 Rd8 64.d5 Be3 (better is 64...b5!? 65.ab5 ab5+=) 65.Ke3+/– ed5 (65...Kc7 66.d6 Kd7 67.Rb1+–) 66.Kd4 Kc7 67.Rh1 b5 68.a5 b4 69.Rb1 (69.Rh7!? Kc6 70.Ra7+/–) 69...Rb8= 70.Kd5 Kd7 71.Kc4 Rc8 72.Kd4 Rc3 73.Rb4 Rg3 74.Rb7 Ke6 75.Rb6 Ke7 76.Rf6 Ra3 77.Rf5 Ra5 78.Rg5 Ra4 79.Ke3 Ra3 (79...g3!?=) 80.Ke4+/– g3 81.f5 (81.Rg7 Kf8 82.Rg6 Ke7+/–) 81...Ra4+= 82.Kf3 Ra3 83.Kf4 a5?? (better is 83...Ra4 84.Kg3 Re4+=) 84.Rg7+– Kf8 85.f6 Ra4 (85...Ra1 86.e6 Re1 87.e7 Ke8 88.Rg8 Kf7 89.Rf8 Kg6 90.Kg3 a4+–) 86.Kf5 Rb4 87.Rg3 (87.e6 Rb5 88.Kg6 Rb4 89.e7 Ke8 90.Rg8 Kd7 91.e8Q Kd6 92.f7 Rf4 93.Qb8 Kd5 94.Qf4 g2 95.Qg5 Kd4 96.Qd2 Kc4 97.Rc8 Kb3 98.Qc2 Kb4 99.f8Q Kb5 100.Qc6) 87...a4 88.Ra3 (88.Rh3 Kg8 89.e6 Rb2 90.Rg3 Kf8 91.e7 Ke8 92.Rg8 Kd7 93.e8Q Kc7 94.Qe5 Kb6 95.Qb2 Kc7 96.Qb8 Kc6 97.Rc8 Kd5 98.Qe5) 88...Kf7 (88...Ke8 89.Rh3 Rb5+–) 89.e6 Kf8 (89...Ke8 90.Rh3 Kd8 91.e7 Kc7 92.e8Q Kb6 93.f7 Rb5 94.Kg6 Rb1 95.f8Q Rg1 96.Kh6 Rb1 97.Qd6 Ka5 98.Rh5 Rb5 99.Rb5) 90.Rc3 Rb8 (90...Kg8 91.f7 Kh7 92.f8Q Rf4 93.Kf4 Kg6 94.Rh3 a3 95.Qf7) 91.Rh3 (91.Kg6 Ke8 92.Rc7 Kf8 93.e7 Kg8 94.f7 Kh8 95.f8Q Rf8 96.ef8Q) 91...Kg8 92.Kg6 1–0. Mehlhorn,Uwe (2120) – Green,Per (1995), Gibraltar Masters, 2015.

6.Nf3 Qb6 7.a3 a5 Black threatens to win material: a5xb4 8.Bd4 Qa6 (8...Qc7 9.Be5 Qc8 10.ba5 Ra5 11.c4=) 9.d3 Covers e4 (9.b5 cb5 10.Nc3 Nbd7=) 9...Nbd7 10.0–0 e6 11.Nbd2 Be7 (11...ab4?? the pawn must be left alone, otherwise Black will be punished 12.ab4 Qa1 13.Ra1 Ra1 14.Ba1 Bb4 15.Qd1+–) 12.Rab1 (12.h3 b5= (12...ab4?? taking the pawn will cause Black grave problems 13.ab4 Qa1 14.Ba1+–)) 12...0–0 13.c4 b5 14.c5 White gains space 14...Qb7 15.e4 ab4 16.ab4 Ra2 17.Bb2 Rfa8 18.e5 White threatens to win material: e5xf6 18...Ne8 19.Qe3 R8a4 Black threatens to win material: Ra4xb4. Praise the rook! 20.Bc3 Nf8 (20...Nc7 21.Nb3=) 21.Nd4 The knight likes it on d4 21...Qc8 22.f4 f6 23.ef6 gf6 24.Qg3 Ng7= 25.Rbe1 Kf7? 26.Re3 Bc5 27.bc5 b4 28.Bb4 Rb4= 29.N2b3 Raa4+= 30.Qg4? Rd4–+ 31.Nd4 Rd4 32.Rg3 Ng6 33.h4? Nf5 34.Rh3 Qg8 35.Ra1 Rf4 36.Ra7 Nfe7 37.Qh5 Rf5 38.Qd1 Nf4 39.Rh2 Qg3 40.Ra3 Qe3 (40...Qe3 41.Kh1 h5–+) 0–1. Sirokmany,Gabor (2155) – Horvath,Mario (2300), HUN–chT2 Breyer, 2002.

6.Nf3 Nbd7 7.0–0 e6 8.b5 c5 9.a4 Bd6 10.d3 Qc7 11.Nbd2 0–0 12.e4 de4 13.de4 Ne5 14.g3 Rfd8 15.Nc4 Nc4 16.Qc4 Nd7 17.Qc3 Bf8 18.Nd2 Nf6 19.Rfe1 c4 20.Kg2 Rac8 21.Nf1 a5+= 22.ba6 ba6–/+ 23.a5 Qb7–+ 24.Ba3 Ne4 25.Qf3 Ba3 26.Ra3 f5 27.g4 Qf7 28.Re4 fe4–+ 29.Qe4 c3 30.Ra4 Rd5 31.Rc4 Rf8 32.f3 Qf6 33.Rc3 Ra5 34.Re3 Rc5 35.Qa4 a5 36.Ng3 Qf4 37.Qb3 Rc2! 38.Kh3 Qc4 39.Qb7 Qa2 40.Nf1 Rf2 (40...Rf2 41.Qa6 e5–+) 0–1. Barlag,Christoph (2135) – Svetushkin,Dmitry (2550), 10th Schloss Open, Werther GER, 2004.

6.Nf3 e6 7.a3 Bd6 8.Nc3 Nbd7 9.e4 Ne4 10.Ne4 de4 11.Qe4 Qe7 12.Qg4 (< 12.Bg7 f5 13.Qe3 Qg7 14.Qe6 Qe7–/+) 12...0–0–0 13.0–0 (< 13.Bg7 Rhg8 14.Qd4 e5 15.Qa7 Rg7–+) 13...Rdg8 14.Rfe1 (14.Bg7? f5 15.Qd4 Qg7 (15...Rg7?! 16.Qa7 Rhg8 17.g3–+) 16.Qg7 Rg7–+) 14...h6 15.Qe4 (15.Bg7? Rh7–+) 15...Nf6 16.Qe3 Kb8 17.Bd4 a6 18.c4 h5 19.h3 Rh6 20.Bc5 g5 21.Bd6 (White gets kings attack) 21...Qd6 22.Ne5 Rg7 23.a4 Ng8 (23...Qb4?? 24.Nc6! bc6 25.Reb1+–) 24.Nd7 Kc8 25.Nb6 Kb8 26.b5 g4 27.c5 Qc7 28.Nd7! Ka8 (28...Qd7 29.Qe5) 29.Qc3 Rg5 30.h4 Rf5 31.Qg7 Qd8 32.bc6 bc6 33.Rab1 Rg6 (33...Rhf6 34.Rb8 Qb8 35.Nb8 Rd5 36.Qf8 Rd8 37.Qd8 Ka7 38.Nc6 Kb7 39.Rb1 Kc6 40.Qd6) 34.Qb2 (34...Qc7 35.Qb8 Qb8 36.Rb8 Ka7 37.Reb1 a5 38.R1b7 Ka6 39.Rc7 Rf2 40.Rb6#) 1–0. Trokenheim,Marek – Fricot, email CTON Cup, 1997.

6.Nf3 e6 7.a3 Nbd7 8.0–0 Bd6 9.c4 0–0 10.c5 Bc7 11.d3 Re8 12.Nbd2 a5 13.Nb3 Qe7 14.e4 e5 15.Bc3 a4 16.Nc1 b5 17.ed5 Nd5 18.Bd2 Rad8 19.Qe4 N7f6 20.Qf5 Qd7 21.Qd7 Rd7 22.Re1 h6 23.g3 Kf8 24.Na2 Nh7 25.Nc3 Nc3 26.Bc3 Rd3 27.Re3 Re3 28.fe3 f6 29.h4 g5 30.Rd1 Rd8 31.Rd8 Bd8 32.Kf2 Ke7 33.Nd2 Ke6 34.Ne4 Be7 35.Kf3 f5 36.Nd2 gh4 37.Kg2 hg3 38.Kg3 Bg5 39.e4 fe4 40.Ne4 Bc1 0–1. Devis – Van Dosselaer, Beveren 1995.

6.Nf3 e6 7.a3 Nbd7 8.d3 Be7 9.Nbd2 0–0 10.0–0 a5 11.c3 b5 12.h3 Nb6 13.Ne5 Qc7 14.f4 Na4 15.Nb3 ab4 16.cb4 Nd7 17.Rfc1 Nb2 18.Qb2 Bf6 19.d4 Be5 20.fe5 Nb6 21.Nd2 Ra4 22.Nb1 Nc4 23.Qb3 Rfa8 24.Rc2 Qe7 25.Rc4 bc4 26.Qc3 Qa7 27.Ra2 h6 28.g3 Qe7 29.Rf2 Qg5 30.Kg2 Qg6 31.Qe1 Qe4 32.Kh2 Ra3 33.Na3 Ra3 34.Re2 Rb3 35.Qa1 Rb1 36.Qa8 Kh7 37.Rg2 Qe3 38.Qc6 0–1. Gutierrez Lazaro,Josep (1920) – Triadu Cassa,Jordi (2265), Barcelona ESP, 1st Tona Open, 2011.

6.Nf3 e6 7.b5 Qb6 8.a4 a6 9.Nc3 ab5 10.ab5 Ra1 11.Ba1 c5 12.0–0 Be7 13.Rb1 Nbd7 14.Nd1 0–0 15.c4 Qc7 16.d3 Ra8 17.h3 Nb6 18.Ne5? (18.Be5 Bd6 19.Bf6 gf6=) 18...Nfd7?? (better is 18...Ra1 19.Ra1 Qe5–+) 19.Nd7+= Qd7 20.Qg4 Bf8 21.Nc3 f5 (21...dc4!? 22.dc4 Qd3–+) 22.Qe2+= g6 23.Nd1 dc4 24.dc4 Bg7 (24...Ra4!?–/+) 25.Bg7= Qg7 26.Kh2 Ra3 27.Rc1 Qd7 28.Rc2 Qd6 29.g3 Qd3 30.Qd3 Rd3 31.Nb2 Ra3 32.Rd2 Ra2 33.Kg2 Kf7 34.Rd6 Nc8 (worse is 34...Rb2 35.Rb6 Rb4 36.Rb7 Kf6 37.Rh7 Rc4 38.b6+=) 35.Rd8 Nb6 (worse is 35...Rb2 36.Rc8 b6 37.Rc6+=) 36.Rd6 ½–½. Frosinos,I (1640) – Bras,E (1995), 11th Gazi Open, 2015.

6.Bf6 ef6 7.a3 Bd6 8.Nf3 a5 9.b5 Nd7 (9...Qb6 10.bc6 Qb2 11.cb7–+) 10.d4 (10.0–0 0–0=) 10...Qc7 (10...Rc8 11.bc6 Rc6 12.0–0=) 11.0–0 0–0 12.c4 dc4 13.Qc4 Nb6 14.Qe2 cb5 15.Qb5 Rfc8 16.Nbd2 Qc6 (16...a4 17.Rfd1+=) 17.Rfb1 Ra6 18.g3 (18.e4 Qc3+=) 18...Qc2 (18...Qb5 19.Rb5 Rc2 20.Rab1+=) 19.Rb2 (19.e4 a4+=) 19...Qc6 (19...Qg6 20.e4=) 20.Qc6+/– Rc6 21.a4 (21.e4 a4+/–) 21...Bb4 22.Raa2 Rc1 23.Kg2 Ra8 (better is 23...Bc3 24.Rb1 Rb1 25.Nb1 Bb4+/–) 24.Rc2 (better is 24.Nb3 Rd1 25.e4+=) 24...Rc2=+ 25.Rc2 Na4 26.Rc7 b5 27.Rb7 Nc3–/+ 28.e4 a4 29.d5 a3–+ 30.Nd4 a2 31.N2b3 Ne4 32.Rb5 Bf8 33.Nc6 Nc3 34.Rb7 Nd5 35.Na7 Nb4 36.Kf3 Nc2 (37.Nc6 Ra3–+) 0–1. Rush,Bradley – Genge,Peter, corr IECG Cat–C, 1995.

5.Qe2 e6

6.a3 c6 7.Nf3 a5 8.0–0 ab4 9.ab4 Ra1 10.Ba1 Bb4 11.Nc3 0–0 12.Rb1 Qe7 13.Ne5 Bd6 14.Ng4 Ng4 15.Qg4 f5 16.Qd4 e5 17.Qb6 Rf7 18.Ne2 Na6 19.h3 Nb4 20.c3 Nd3 Black prepares f4 21.Nc1 Nc1 22.Rc1 f4 23.c4 fe3 24.de3 Bc5 25.Qb2? (better is 25.Qa5 d4 26.ed4 ed4 27.Qd2–+) 25…Ba3–+ (25...Ba3 26.Qd2 Bc1 27.Qc1 Qh4 28.cd5 Qf2 (28...cd5?! 29.Qc8 Rf8 30.Qb7–+) 29.Kh2 Qf1 (29...cd5?! 30.Qc8 Rf8 31.Qb7–+) 30.Qf1 Rf1 31.Be5 cd5–+) 0–1. Rush,Bradley – Couspeyre,Thierry, ZL–2011–0–00904, 2011.

6.a3 c6 7.Nf3 g6 8.0–0 Bg7 9.d3 0–0 10.Nbd2 Nbd7 11.c4 Re8 12.Rac1 Rc8 13.cd5 (13.e4 c5+=) 13...ed5= 14.Rfe1 Re7 15.Nb3 Qe8 16.Na5 Nb6 17.Qc2 Rcc7 18.h3 Nc8 19.Nb3 Nd6 20.Nbd4 Nd7 21.Nb3 Bb2 22.Qb2 Nf5 23.Nbd4 Nd4 24.Qd4 b6 25.Qh4 Nf8 26.d4 Re4 27.Qg3 Nd7?? (better is 27...Ree7+=) 28.Qc7+– Nf6 (28...Nb8 29.Ne5+–) 29.Rc6 (29.Rc6 Re7 30.Qc8+–) 1–0. Fournier,Frederic – SoyLudwig, Active, 2004.

6.a3 Nbd7 7.Nf3 Bd6 (7...a5 8.Qb5=) 8.c4 (8.0–0 0–0=) 8...c6 (8...dc4 9.Qc4 a5 10.d3=) 9.d3 0–0 10.e4 (10.0–0 a5 11.c5 Be7=) 10...e5 (10...Nh5 11.0–0=) 11.Nbd2 (11.0–0 d4=) 11...Nh5 12.g3 f5 (12...Re8!?=) 13.cd5 (13.ed5 cd5 14.0–0 Re8+=) 13...cd5 14.ed5 Rc8 (14...Re8 15.0–0+=) 15.Nc4+/– (15.Ne5 Ne5 16.0–0 Rc2 17.Be5 Be5–/+; 15.Be5? Ne5 16.0–0 Nf3 17.Qf3 g6–+) 15...Bb8 16.0–0 (16.Nfe5 Ne5 17.Ne5 Nf6+/–) 16...Ndf6 (16...Re8 17.Nfe5 (< 17.Be5 b5=+) 17...Ne5 18.Be5 Be5 19.Ne5+/–) 17.Nfe5 Qd5 18.Qf3 (18.f4 Qe6+/–) 18...b5 19.Ne3 (19.Qd5 Nd5 20.Ne3 Nhf6+/–) 19...Qf3 20.Nf3 f4 21.Nf5 Rc2 22.Rab1 fg3 23.hg3+– Ng4 24.N5d4 Rcc8 25.Kg2 a6 26.Rbc1 Ne5 27.Ne5 Be5 28.Nc6 Bb2+/– 29.Ne7 Kf7 30.Nc8 Bc1 31.Rc1 Ke6 32.Na7 Rd8 33.Rc3 Nf6 34.Nc6 Rd6 35.Na5 Nd5 36.Rc1 Nb6 37.Nb7+– Rd3?? 38.Nc5 (38...Kd5 39.Nd3+–) 1–0. Teichmann,Erik (2365) – Levi,Eddy (2270), Australian Masters, 1998.

6.a3 Be7 7.Qb5 Nbd7 +=.

6.a3 Be7 7.Nf3 0–0 8.0–0 c5 9.bc5 Bc5 10.d4 Be7 11.Nbd2 Nc6 12.c4 Rc8 13.cd5 Nd5 14.Rfc1 Qb6 15.Nc4 Qc7 (15...Qa6 16.Qd3=) 16.Nce5+= Qd8 17.Qb5 (17.Nc6 bc6 18.e4 Nf4+=) 17...Ne5= 18.Ne5 Nb6 19.Rc8 Qc8 20.Rc1 Qd8 21.a4 a6 22.Qb3 Qd6 23.Nc4 (better is 23.a5!? Nd7 24.Qb7 Ne5 25.de5+/–) 23...Nc4= 24.Qc4 h6 25.Qc7 Qb4 26.Bc3 Qd6 (better is 26...Qa3 27.Bd2 b5=) 27.Ba5?? (27.Qb7!? Rb8 28.Qf3+=) 27...Qa3?? (better is 27...Qc7 28.Rc7 Bd8–+) 28.Bd2= Qb2 29.Qc2 Qb6 30.g3 Bf6 31.Rb1+/– Qa7 32.Bb4 Rd8 33.Qc7 Qb8 34.Qb8 Rb8 35.Bd6 Rd8 36.Bc7 Rd7 37.Rb7 Bd8 38.Rb8+– Rc7 39.Rd8 Kh7 40.Rd6 Ra7 41.a5 Kg6 42.Kg2 Kf6 43.e4 White prepares d5 43...Ke7 44.Rc6 Kd7 45.Rb6 Kc7 46.d5 ed5 47.ed5 f6 48.f4 Kd7 49.Kf3 Kc7 50.Ke4 Kd7 51.Kf5 Ke7 52.d6 Kf7 53.Rc6 g6 54.Ke4 Ke6 55.Rc7 Ra8 56.d7 Rd8 57.g4 Rd7 58.Rd7 Kd7 59.Kd5 h5 60.h3 hg4?? 61.hg4+– g5 62.f5 Ke7 63.Kc6 Kd8 64.Kb6 Kd7 65.Ka6 Kd6 66.Kb7 Ke5 67.a6 Kf4 68.a7 Kg4 69.a8Q Kf5 70.Qc8 Kf4 71.Qh3 f5 Black intends g4 72.Kc6 g4 73.Qg2 Kg5 74.Kd5 f4 75.Ke4 f3 76.Qg3 f2 77.Qf2 Kh5 78.Kf4 (78.Kf4 Kg6 79.Qb6 Kg7 80.Kf5 g3 81.Qc7 Kh6 82.Qf7 g2 83.Qg6#; 78.Qf6 g3 79.Kf4 g2 80.Qg5#) 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

6.a3 Be7 7.Nf3 c6 8.c4 dc4 9.Qc4 Nbd7 10.d4 Nb6 11.Qc2 Qc7 12.Nbd2 h6 13.0–0 0–0–0 (13...0–0!?=) 14.Rfc1 g5? (better is 14...a6+=) 15.b5+– Bd6 16.bc6 bc6 17.Nc4 (17.d5!? Nfd5 18.Bh8 g4+–) 17...Nc4 18.Qc4 Kd7 19.Ne5 The isolani on c6 becomes a target 19...Be5 20.de5 Ne8?? 21.a4 Ng7+/– 22.Ba3 Ke8 23.Bd6 Qc8 24.Rab1 Qd7 25.Qa6 Rc8 26.Rb7 Qd8 27.Re7 Qe7 28.Be7 Ke7 29.Qa7 Kf8 30.Qd7 Re8 31.Rc6 Nf5 32.Rc8 Rc8 33.Qc8 Kg7 34.Qb7 Rd8 35.g3 Rd1 36.Kg2 Rd2 37.Kf1 Ra2 38.Qb3 Rd2 39.a5 Rd5 40.a6 Ra5 41.Qb7 Ra1 42.Kg2 Ra2 43.Kf3 Ra3 44.a7 Nd4 45.Kg2 Nc6 46.a8Q (46.a8Q Ra8 47.Qa8 Ne5 48.Qa1+–) 1–0. Fournier,Frederic (1885) – Denker, Active, 2012.

6.b5 Bd6 7.Nf3 0–0 8.0–0 a6 9.a4 Nbd7 10.d4 c5 11.bc6 bc6 12.c4 Qe7 13.c5 White threatens to win material: c5xd6 13...Bc7 14.Nc3 e5 The typical lever 15.Rab1 Rfe8 16.Rfe1 e4 Black gets more space 17.Nd2 Nf8 18.Ba3 h5 19.Rb3 Ng4 Black threatens to win material: Ng4xh2 20.Nf1 Qh4 The pressure on h2 grows. Black has a mate threat 21.h3 White threatens to win material: h3xg4 21...Re6 Loses material 22.Rb7+= Ba5 23.Bb4 Bb4 24.Rb4 Rg6?? 25.Ng3 Nf2= 26.Qf2 Qg3 27.Qg3+= Rg3 28.Rb6 Rg6 29.Reb1 Nd7 30.Rb7+/– Nf8 31.Rb8 White threatens to win material: Rb8xa8 31...Ra7? 32.Rc8 f5+/– 33.Rbb8 Rf7 34.Ne2 h4 35.Ra8 Rh6? 36.Ra6 Rff6 37.Raa8 g5 Black prepares f4 38.a5 f4 39.a6 f3 40.Rf8! the end, the rest is history (40.Rf8 Rf8 41.Rf8 Kf8 42.a7 fe2 43.a8Q Ke7 44.Qb7 Ke8 45.Kf2+–) 1–0. Ferreiro Montoya,JI – Suarez Real,A (2115), Cantabria selection op, 2000.

6.Qb5 Nc6 =.

6.Nf3 c6 7.a3 =.

6.Nf3 Nbd7 7.b5 Bd6 8.0–0 0–0 9.a4 c6 10.bc6 bc6 11.c4 Rb8 12.Bf6 Nf6 (worse is 12...gf6 13.d4+=) 13.d4 Qa5 14.c5 Bc7 15.Nbd2 Rb2 16.Rab1 Ra2 17.Qd3 Rc8 18.Rb7 Qa4 19.Rfb1 g6 20.g3 Kg7 21.h3 Ra3 22.Qf1 Nd7 23.Kg2 e5 24.Qc1 e4 25.Ne1 Ra2 ½–½. de Visser,Arnold W (1995) – Hammerschmidt,Volker (1895), WS/O39 ICCF, 2012.

6.Nf3 Nbd7 7.b5 Bd6 8.d4 0–0 (8...c6 9.bc6 bc6 10.0–0=+) 9.0–0 (9.Ba3 Nb6=+) 9...c6 (9...Nb6 10.Ne5=+) 10.c4= cb5 11.c5 Bb8 (11...Be7 12.Qb5 Qc7 13.Rc1=) 12.Qb5 Qc7 13.Rc1 Rc8 14.Nbd2 Ne4 (14...Qc6 15.Qc6 Rc6 16.Rab1=) 15.g3 (15.Ne4 de4 16.Ne5 Ne5 17.de5 a6=) 15...Nd2 16.Nd2 Qc6 (16...Nf6 17.Rab1 Qe7 18.Bc3=) 17.a4 (17.Qc6 Rc6 18.f3 Bc7=) 17...Bc7 (17...Qc7 18.Rab1 a6 19.Qb4=) 18.Bc3 (18.f3 e5=) 18...Bd8 (18...Rcb8 19.Rab1=) 19.Rcb1 (19.Qc6 Rc6 20.a5 Rac8=) 19...b6=+ 20.a5 (20.cb6 Qc3 21.b7 Nf6+–) 20...Qb5 (20...bc5 21.dc5 Nc5 22.h4–/+) 21.Rb5 a6 22.Rb3?? (22.Rb6 Bb6 23.ab6 Nb6 24.f3–/+) 22...bc5–/+ 23.Rb7 cd4 24.Bd4 Rc7 25.Rab1 Nf6 26.Rb8 Rc8 27.Ra8 Ra8 28.Bb6 Be7 29.Rc1 Ne8 30.Nf3 Bf6 31.g4 h6 32.h4 g6 33.g5=+ hg5 34.hg5 Bg7 35.Nd4 Nd6–/+ 36.Kg2 Nc4 37.Nc6 Bf8 38.Rh1 Bd6 39.f4 Rc8–/+ 40.Bd4 e5 41.fe5 Rc6?? 42.ed6+/– f6 43.gf6 Nd6 44.Rh8 Kf7 45.Rh7 Kf8 46.Kf3 Nf5 47.Bb2+/– Nd6 48.Rd7 Nc4+= 49.Bc3 Ke8?? 50.f7+– (50...Kd7 51.f8Q+–) 1–0. Lorenc,Tomas (2185) – Bartos,Alois (2110), CZE–chT2a, 2001.

6.Nf3 Nbd7 7.Qb5 Rb8 =.

5.Ne2 e6

6.a3 a5 7.ba5 (7.b5 Nbd7+=) 7...Nc6 8.d3 (8.Bf6 Qf6 9.Nbc3 Bd6+=) 8...Bd6 9.Nbc3 Ra5 10.0–0 0–0 11.Nd4 (11.a4 e5+=) 11...Nd4 12.ed4 Qd7 13.Qd2 Rfa8 14.Rfb1 R5a6 15.Bc1 c6 16.h3 (16.g3 b5–/+) 16...b5 17.Ne2 e5 (17...Qc7 18.Qc3–/+) 18.de5 Be5 19.c3 Ra4 20.d4 (20.Qc2 h6–/+) 20...Bd6 21.Rb3 (21.Qd3 h6–/+) 21...Qf5–+ 22.Ng3 Qg6 23.Qe3 (better is 23.Qd1–+) 23...Re8 24.Qf3 (24.Qd2 Bg3 25.fg3 Qg3–+) 24...Re1 25.Nf1 Ne4 26.g3 (26.Rbb1 Ra8–+) 26...h6 27.Rab1 (27.Qg4 Qg4 28.hg4 Nd2 29.Bd2 Ra1–+) 27...Bg3! 28.Be3 (28.fg3 Qg3 Deflection) 28...Bf2 0–1. Hovla1 – marekt, ChessWorld.net, 2015.

6.a3 c5 7.b5 Bd6 8.0–0 Nbd7 9.d3 Qc7 10.h3 0–0 11.Nd2 e5 12.a4 e4 13.f3 Rfe8 14.d4 ef3 15.Nf3 (15.Rf3 Re7–/+) 15...Ne4 (15...Re3 16.dc5 Bc5 17.Bd4–/+) 16.c3 (16.dc5 Bc5 (16...Nec5?! 17.Nc3=) 17.Bd4 Ndf6+=) 16...f5 (16...Nb6 17.Qd3–+) 17.Rc1 (17.dc5 Qc5 (worse is 17...Ndc5 18.Qd5 Qf7 19.c4+=) 18.Nfd4 g6+=) 17...Ndf6 18.Nh4 (18.c4 dc4 19.Ne5 c3 20.Nc3 Ng3 21.Qb3 Kf8=) 18...g6 19.Ba3 (better is 19.Nf3!?–/+) 19...Bh2–+ 20.Kh1 Ng3 (20...Bg3!? 21.Nf5 gf5 22.Kg1–+) 21.Ng3–/+ Bg3 (21...Qg3? A) worse is 22.Bc5 Qh4 (worse is 22...Re3 23.Nf3+/–) 23.Kh2 Re3+=; B) 22.Nf3 c4 23.Nh2+–) 22.Nf3 Re3 (22...c4 23.Qd2–+) 23.Bc5 (23.dc5!? Rae8 24.Bb2+=) 23...Ne4–/+ 24.Rc2 Nc5 25.dc5 Qc5 26.Qd4 Qd4 27.cd4 Rae8 28.Rcc1 Ra3 29.Ra1 Ree3 30.a5 (better is 30.Ng1–+) 30...Ra1 31.Ra1 Rb3 32.Kg1 Rb5 33.Ne5 Be5 34.de5 Kf7 35.Rc1 Ke6 36.Rc7 Ke5 37.a6 ba6 38.Ra7 a5 39.Rh7 d4 40.Re7 Kf4 41.Kf2 Rb2 42.Kf1 d3 43.Rd7 Ke3 44.Re7 Kd2 45.Ra7 Kc1 46.Kg1 d2 47.Ra5 d1Q 48.Kh2 Qd2 49.Rc5 Kb1 50.Kg3 Qf2 51.Kh2 Qg2# 0–1. normn – Sim1, ChessWorld.net, 2012.

6.a3 c5 7.b5 Nbd7 8.0–0 Be7 9.d3 0–0 10.Nd2 a6 11.a4 Qb6 12.c4 Rfd8 13.Qc2 Nf8 14.Nf3 Ng6 15.h3 h6 16.Kh1 (16.a5 Qd6=) 16...Qc7 (16...Qd6 17.a5=) 17.Nd2 (17.Kg1 e5=) 17...Nh5 (17...Qd7 18.Rfd1=+) 18.f4 (18.cd5 ed5 19.Rfc1 ab5 20.ab5 Ra1 21.Ra1 Qd7=) 18...d4 (18...Qd7!? 19.Rfd1 d4=+) 19.g4+= Nf6 20.ed4 cd4 21.Bd4 (21.f5 ef5 22.gf5 Nh4=) 21...ab5 22.ab5 Ra1 23.Ba1 (< 23.Ra1 Nf4 24.Nf4 Qf4 (24...Rd4?! 25.Ne2 Rd8 26.d4=+) 25.Bf6 Qf6–/+ (25...gf6?! 26.Kg2–/+)) 23...Bf8? (better is 23...Nd5 24.Qb2 Bf6=) 24.Bf6+– gf6 25.Ne4 (25.f5 ef5 26.Rf5 Ne7 27.Rf6 Nd5+–) 25...Bg7 26.d4 (26.f5 Ne5 27.Nf4 Qe7+–) 26...f5+/– 27.gf5 ef5 28.N4g3 Nh4. Gross,Wilhelm – Merten,Rainer, xiii/27, 1988.

6.a3 c5 7.c3 Nbd7 8.d3 Be7 (8...Bd6 9.Nd2=+) 9.0–0 0–0 10.Nd2 Ne5 (10...Qc7 11.Qb3=+) 11.Qc2 (11.Nf4 c4 12.d4 Ned7=+) 11...c4 12.dc4 Nc4 (12...dc4 13.Nd4=+) 13.Nc4 dc4 14.Rfd1 (14.Rad1 Qc7=) 14...Qc7 15.h3 (15.Nd4 Rad8=+) 15...e5 (15...Rfd8 16.Rd8 Rd8 17.Rd1=+) 16.Rd2 (16.Ng3 Rfd8=) 16...Rfd8 (16...Rad8 17.Rad1=+) 17.Rad1 b5 (17...Rd2 18.Rd2 a5 19.e4=+) 18.Ng3 (18.a4 Rd2 19.Rd2 ba4 20.Qa4 Rd8 21.Rd8 Qd8=) 18...Rd2 19.Rd2 Rd8 20.Nf5 Bf8 (20...Rd2 21.Qd2 e4 22.Nd4=+) 21.Qd1 (21.e4 Rd2 22.Qd2 g6=) 21...Rd2 22.Qd2 g6 23.Ng3 Be7 24.Qc2 Qc6 25.Bc1 Kg7 26.e4= Qd7 27.f3 h5 28.Ne2 a5 29.Be3 Bd8 30.Kf2 Qd6 31.g4 ab4 32.cb4 hg4 33.fg4 Bb6=+ 34.Bb6 Qb6 35.Kf3 Qa7 36.Qc3 Qb8 37.Qb2 Qd6 38.Qc2 Ne8 39.g5 Nc7 40.h4 Ne6 41.Qb2?? Qd3–+ 42.Kf2 Qe4 (43.Kg3 Nd4 44.Nd4 Qf4 (< 44...Qd4 45.Qe2–+; 44...ed4 45.Qf2 Qe5 46.Kg2–+) 45.Kg2 ed4–+) 0–1. coloplayah (2140) – paloypalo (2060), net–chess.com, 2006.

6.a3 c6 7.0–0 8.ba5 Ra5 9.d3 Nbd7 10.Nd2 Be7 11.c4 0–0 12.cd5 ed5 13.Nd4 g6 14.N2b3 Ra6 15.a4 Re8 16.a5 Bb4 17.Qc2 Qe7 18.Ra4 Bd6 19.Nf3 b5 20.Rh4 c5 21.Rh3 Rc8+= 22.Ra1 c4 23.dc4 dc4 24.Bd4 Rca8 25.Nbd2 Ra5 26.Ra5 Ra5 27.e4 Bc5 28.Bc3 Ra8 29.e5 Nd5 30.Qe4 N7f6 31.Qh4 Nc3 32.g3 Nh5 33.Ng5 Qe5 34.Ndf3 Ra1 35.Kg2 Qe2 (35...Qe2 36.Nd4 Qd1 37.Qh5 Qh1#) 0–1. Ivanets,Vladimir (2245) – Pushkov,Nicolay (2510), 17th Senior WCh, Gmunden AUT, 2007.

6.a3 Be7 7.d3 0–0 8.Nd2 Nbd7 9.c4 c5 10.b5 Nb6 11.a4 dc4 12.Nc4 Nbd5 13.0–0 Rc8 14.Qb3 Nb4 15.Rfd1 Qd5 16.Rac1 Rfd8 17.d4 Qf5 18.Ng3 Qg6 (better is 18...Qg5!?+=) 19.Ne5+/– Qg5 20.dc5 (better is 20.f4!? Qh4 21.Nf5 ef5 22.Qf7 Kh8 23.Qe7+–) 20...Rd1+/– 21.Qd1 h5 (21...Bc5?? 22.Rc5! Ra8 23.Rc7+–; 21...Rc5?? 22.Rc5 Bc5 23.Qd8 Bf8 24.Nd7 Nd7 25.Qg5+– (25.Qd7?! Qc5=)) 22.Nf3 Qg6 (22...Qd5 23.Bf6 Bf6 24.Qd5 ed5 25.Nh5+/–) 23.c6! bc6 24.Ne5 Qg5 25.Nc6 Nc6 26.Bf6 Qf6 27.Nh5 Qe5 28.bc6 Ba3 29.Rc4 Qa5 30.Ng3 Rd8 31.Rd4 Rc8 32.Qc2 Rb8? 33.c7+– Rc8 34.Rd7 Bc5 35.Rd8! Rd8 36.cd8Q Qd8 37.Qc5 Qd1 38.Nf1 Qa4 39.Qd4 Qa2 40.g3 a5 41.Nd2 a4 42.Qb4 a3 43.Nb1 Qa1 44.Kg2 a2 45.Nc3 g5 46.Qa3 g4 47.Na2 e5 48.Qa8 Kg7 49.h3 gh3 50.Kh3 Qf1 51.Qg2 Qe2 52.Qd5 Qf2 53.Qe5 Kg6 54.Qe4 f5 55.Qe6 Kg5 56.Qg8 Kf6 57.Qh8 Kg6 58.Qg8 Kf6 59.Qd8 Kg6 60.Qd6 Kg7 61.Qd3 Qf3 62.Qc3 Kg6 63.Qe1 Qa8 64.Nc1 1–0. Schott,Detlef (1875) – Gockel,Mirco (1915), Niederrhein–ch, 2005.

6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c5 10.0–0 Be7 11.Bf6 Bf6 12.d4 c4 13.Nbc3 Nd7 14.e4 Nb6 15.e5 Be7 16.Nf4 0–0 17.Qg4 Kh8 18.Ra1 g6 19.Ra7 Qb8 20.Ra2 Bb4 21.Nfe2 Qc7 22.Qf4 Ra8 23.h4 Bf8 24.h5 Ra2 25.Na2 Qe7 26.hg6 hg6 27.Nac3 Kg8 28.Qc1 Nd7 29.g3 f6 30.ef6 Nf6 (30...Qf6 31.Qe3=) 31.Qg5+= Kg7 32.Nf4 Qe8 33.Qe5 The backward pawn on e6 becomes a target 33...Kf7 34.f3 Bh6 35.Qc7 (35.Kf1 Qe7+=) 35...Qd7= 36.b6 Bf4 37.Qf4 Kg7 (37...Ke7 38.Qg5 Kf7 39.Qe5=) 38.Ne2+/– Ne8 39.Qg5 Nd6? (better is 39...Nf6 40.Nf4 Qe8+/–) 40.Nf4+– Kf7 41.Qg6 Ke7 42.Qg5 Kf7 43.Qg6 Ke7 44.Qg7 Kd8 (44...Ke8 45.Qh8 Kf7 46.g4+–) 45.Qf6 Qe7 46.Ne6 Kd7 (46...Ke8 47.Qe5 Kd7 48.Nc5 Ke8 49.f4 Qe5 50.de5+– (50.fe5?! Nc8+–)) 47.Nc5 Ke8 48.Qg6 Nf7 49.Qg8 Qf8 50.Qf8 Kf8 51.Nb7 Ke7 52.Kf2 Kd7 53.Nc5 (53.Nc5 Kd6 54.b7+–) 1–0. Pcmvr – Garethh, playchess.de, 2005.

6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c6 10.bc6 Nc6 11.0–0 Qa5 12.Bb2 Be7 13.d3 0–0 14.Nbc3 b5 15.Qa1 b4 16.Qa5 Na5 17.Nb1 b3 18.cb3 Nb3 19.e4 Rc8 20.Nd4 Rc1?? 21.Bc1 Nd4+/– 22.Be3 Nc2 23.Bd2 de4 24.de4 Ne4 25.Bf4 g6 26.Rd1 Bc5 27.Rf1 Nb4 28.Be3 Be3 29.fe3 Nd3 30.Rd1 Ne5 31.Nd2 Nf6 32.Nf3 Neg4 33.Ng5 h6=+ 34.Rd8 Kg7 35.Nf3 Ne3 36.Ne5 Neg4 ½–½. valpa – schnitzly, HCL–C1976 playchess.de, 2003.

6.b5 a6 7.a4 Nbd7 8.0–0 Bd6 9.g3 (9.Nbc3 0–0=+) 9...0–0 10.d3 c6 11.bc6 bc6 12.Nd2 e5 13.d4 e4 14.f3 ef3 15.Rf3 Rb8 16.Ba3 Ba3 17.Ra3 Re8 18.Rb3 (18.c4 Qe7 19.c5 Rb2=+) 18...Qa5–/+ 19.Rb8 (19.Ra3 c5–/+) 19...Rb8 20.c3 Nb6 21.e4 (21.c4 Qa4 22.Qb1 dc4–+) 21...Qa4 (21...Ne4!? 22.Ne4 de4 23.Re3 Na4 24.Qc2–+) 22.Qf1 Qc2 23.Qe1?? (better is 23.e5 Nfd7 24.Qc1 Qc1 25.Nc1–+) 23...Nc4 (23...de4?! 24.Rf1–+; 23...Ne4?! 24.Ne4 Qe4 25.Qf1–+) 24.Nc4 Rb1 (25.Qb1 Qb1 26.Rf1 Qe4–+; 24...dc4 25.Rf6 Rb1 26.Rf1 Re1 27.Re1–+) 0–1. Hasler,Ueli – Proell,Helmut (1825), CiF, 2006.

6.b5 a6 7.ba6 Na6 8.0–0 Bd6 9.c4 0–0 10.d3 dc4 11.dc4 Ng4 12.Nf4 Qg5 13.h3 Nf6 (13...Bf4? 14.ef4 Qf4 15.Qg4 Qg4 16.hg4+–) 14.Qf3 Nc5 15.Nc3 Be5 16.Rfd1 Qf5 17.g4 Qg5 18.Nfe2 (18.Nd3 Nfd7=+) 18...h5 (18...b6!?–/+) 19.Qg2=+ Bc3 20.Bc3 hg4 21.Bf6 Qf6 (22.Qg4 Rfd8=+). Fischer,D – Cody,P, corr SOK–90–64, 1990.

6.b5 c6 7.a4 a6 (7...Bd6 8.0–0=) 8.Nbc3 ab5 9.ab5 Nbd7 10.bc6 (10.Ra8 Qa8 11.0–0 Bd6=) 10...bc6 11.Nd4 Qc8 12.0–0 Bd6 13.Qe2 (13.Ra8 Qa8 14.Qa1 Qc8=) 13...0–0 (13...Ra1 14.Ra1 Bh2 15.Kh2+–) 14.Ra8= Qa8 15.Ra1 (15.f4 c5 16.Ncb5 cd4 17.Nd6 de3 18.de3 Qc6=+) 15...Qb7 (15...Qb8 16.Rb1=+) 16.Nb3 Ra8 17.Qf1 Bc7 (17...Ra1 18.Qa1 e5 19.Qa5=+) 18.Qc1 (18.Ra8 Qa8 19.f4 c5=) 18...Qb8 19.h3 h6 (better is 19...Ra1 20.Qa1 c5=+) 20.Na5?? (20.Ra8 Qa8 21.d3=) 20...Ne4 (better is 20...Ba5 21.Rb1 e5–+) 21.d3 (21.Nc6 Ra1 22.Ba1 Bh2 23.Kf1 Qd6 24.Ne4 Qc6=) 21...Bh2 (21...Ba5!? 22.de4 Bc3 23.Ra8 Qa8 24.Bc3 Qa2=) 22.Kf1= Ng5 (22...Qc7 A) < 23.Ne4 Ra5 (< 23...de4 24.Nc4 Ra1 25.Qa1+=) 24.Ra5 Qa5=+; B) 23.de4 Ra5 24.Ra5 Qa5 25.g3+/–) 23.f4 Nh7 24.Qe1?? g5 25.g3?? e5?? 26.Qf2?? ef4 27.gf4?? gf4 28.Qh2?? Ne5 29.Qf4 f6?? 30.Qf5 Qc8?? 31.Qc8+– Rc8 32.Nb7 Kf8 33.Nc5 Kf7 34.Ra7 Kg6 35.Ne6 Ng5 36.Rg7 Kf5 37.Nd4# 1–0. Zylla,Johannes – Huebscher, BS–Stadtm., 1991.

6.b5 Bd6 7.f4 Nbd7 8.0–0 0–0 9.d3 Ng4 10.Qd2 Qh4 11.h3 Nh6 12.Nd4 e5 13.Nf3 Qe7 14.fe5 Ne5 (worse is 14...Be5 15.Ne5 Ne5 16.Ba3+–) 15.Nc3 Nf5 (better is 15...Nf3 16.Rf3 Qe5+=) 16.Nd5+/– Nf3 17.Rf3 (worse is 17.gf3 Qg5 18.Qg2 Qg2 19.Kg2 c6 20.Nf6 gf6–/+) 17...Qg5 18.Raf1?? (better is 18.Qc3 Nh4 19.Rf2+=) 18...Nh4 19.Nf4 Nf3 20.Rf3 Qb5 21.Qc3 f6 22.Ba3 Ba3 23.Qa3 Qb1 24.Rf1 Qc2 25.Ne6 Rfe8 26.Rc1? (26.Nd4 Qd2 27.Nf5–+) 26...Qd2 27.Nc7 Qe3 28.Kh1 Rac8 29.Qb3 Kh8 30.Qc3 Qg3 31.Qa5 Rc7! 32.Rc7?? Re1 33.Qe1 Qe1 34.Kh2 Qe5 35.Kh1 Qc7 (35...Qc7 36.Kg1 Qc1 37.Kh2 Qf4 38.Kg1 Qd4 39.Kh2 Qd3–+) 0–1. Jostov,Keylah – Couspeyre,Thierry, OP–2011–0–01530, 2011.

4.Be2 Bf5

5.a3 e6 6.Nf3 Bg4 7.Ne5 Be2 8.Qe2 Nbd7 =.

5.Nf3 e6

6.a3 a5 7.b5 Bg4 8.0–0 Bd6 =.

6.a3 Be7 7.0–0 c6 8.c4 (8.Nh4 Bg6+=) 8...0–0 (8...dc4 9.Bc4 b5 10.Be2=) 9.d4 (9.c5 b6=) 9...Nbd7 (9...dc4 10.Bc4 b5 11.Bd3=) 10.Nc3 (10.Nbd2 a5=) 10...Rc8 (10...dc4 11.Bc4 b5 12.Be2=) 11.Ne5 (11.c5 Ne4=) 11...Ne5 12.de5 Ne4 (12...Nd7 13.cd5 cd5 14.Nb5=) 13.Ne4 Be4 14.Rc1 (14.f3 Bf5=) 14...Bh4 (14...dc4 15.Rc4 Bd5 16.Rc1=) 15.f3 Bf5 16.Qd4 (16.Bd3 Bd3 17.Qd3 a5=) 16...Qg5 (16...a6 17.Rfd1=) 17.f4 (17.Kh1 Qh6 18.Kg1 a6=) 17...Qh6 (17...Qg6 18.cd5 cd5 19.Qa7=) 18.Qa7 Qg6 (18...Rb8 19.Qb6+/–) 19.Qb7 (19.cd5 Ra8 20.Qb7 cd5 21.Qc7+/–) 19...Bh3? (better is 19...Be4!? 20.Bf3 Bd3+/–) 20.Bf3+– Bf5 21.cd5 Be4? 22.dc6 Bf3 23.Rf3 Qd3 24.g3 Qe2 25.Rf2 (25.Rf2 Qg4 26.Rg2+–; 25.gh4?! Qf3 26.Bd4 Qg4 27.Kf1 Qh3 28.Ke2 Qh2 29.Kd3 Ra8+=) 1–0. Wall,Bill – Totana, internet, 2003.

6.b5 a6 7.Nh4 Be4 8.f3 Nfd7 =.

6.b5 Bd6 7.c4 (7.Nh4 Be4 8.d3 Bg6=) 7...dc4 (7...0–0 8.0–0 dc4+=) 8.Bc4 0–0 (8...a6+=) 9.Nd4 Be5 10.Qb3 Bd4 11.Bd4 Nbd7 12.0–0 Nb6 (12...e5 13.Bc3 Nc5 14.Qa3=) 13.Be2= Be4 14.Qb2 Na4 15.Qb4 Nb6 16.Nc3 Nfd5 17.Qb2 (17.Qc5 Nc3 18.dc3 Nd7+=) 17...Nc3 (17...Nf4 18.f3 Ne2 19.Ne2=) 18.Qc3+= Nd5 19.Qb2 f6 20.f3 Bg6 21.e4 Nf4 22.Bc4 Bf7 23.Be3 e5 24.Rac1 Bc4 25.Rc4 Ne6 26.Rfc1 Rf7 27.Qb3 b6 (27...Qd6!?+=) 28.Rc6+/– Nd4 29.Bd4 Qd4 30.Kf1 Rd8 31.Rc7 Qd3 32.Qd3 Rd3 33.Rf7 Kf7 34.Rc7 Kg6 35.Ra7 Rd2 36.Ra6 Rb2 37.a4 Rb4 38.Ke2 h5 39.h4 Rb2 40.Kf1 Rb1 41.Kf2 Rb2 42.Kg3 Rb4 43.Kh3 Kf7 44.g4 hg4 45.Kg4 g6 46.h5 f5 (46...gh5 47.Kh5 Rd4+–) 47.Kg5 fe4 (47...gh5 48.Kf5 h4+–) 48.hg6 Kg7 (48...Ke7 49.g7 Rb2+–) 49.Ra7 (49.Rb6?! ef3 50.Rb7 Kg8+/–) 49...Kg8 50.Kf6 Ra4 51.Ra4 ef3 52.Ra8 1–0. purplegadge (1745) – danielcraciun (1725), gameknot.com, 2014.

4.Ne2 Nbd7

5.f3 Bh5 6.Nf4 e5 7.Nh5 Nh5 8.Bb5? (better is 8.g3 Bb4 9.f4+=) 8...c6–+ 9.Bd3 Qh4 10.Ke2 e4 11.fe4 de4 12.Bc4 Bd6 13.Qf1 0–0 14.Kd1 Bb4 15.Nc3 Qe7 (15...Ndf6 16.a3 Bc5 17.Be2–+) 16.Ne2? (16.a3!? Bc3 17.Bc3–/+) 16...Ne5 (16...Bd2 17.Kd2 Qb4 18.Kc1 Qc4 19.Nd4–+) 17.Bb3 (17.Be5 Qe5 18.c3 Bd6–+) 17...Rad8 18.Bc3 Bc3 19.Nc3 Nf6 20.a4 c5 21.Kc1 Rd7 22.Qe2 Rfd8 23.Rd1 Rc8 24.Bc4 Nc6 25.Bb5 a6 26.Bc6 Rc6 (26...bc6?! 27.Qa6 Rdd8 28.a5+=) 27.Qc4 Qe6 (better is 27...Rb6!?–+) 28.Qe6–/+ Re6 29.a5 Nd5 30.Nd5 Rd5 31.Rb1 Re7 32.c4 Rd3 33.Kc2 Red7 34.Rb6 Ra3 35.Rdb1 Ra2 36.R6b2 Rb2 37.Rb2 f6 38.Rb3 Kf7 39.d3? (better is 39.Rb6–/+) 39...ed3–+ 40.Rd3? (40.Kd2–+) 40...Rd3 41.Kd3 Ke6 42.Ke4 Kd6 43.h4 (43.Kd3 h5–+) 43...Kc6 44.h5 (44.Kd3–+) 44...b6 45.ab6 Kb6 46.g4 (46.Kd3 Ka5 47.Kc3 Ka4–+) 46...a5 (better is 46...Kc6 47.Kd3 Kd6 48.Ke4–+) 47.Kd3 a4 48.e4 (48.Kc2–+) 48...Ka5 49.g5 h6 50.gh6 gh6 51.Kc3 a3 52.Kb3 a2! 53.Kb2 (53.Ka2 Kb4 Combination) 53...Kb4 54.Ka2 Kc4 55.Kb2 Kd4 56.Kb3 (56.e5 Ke5 57.Kc3 f5 58.Kc2 Ke4 59.Kd2 c4 60.Kd1 Ke3 61.Kc2 f4 62.Kc3 f3 63.Kb4 f2 64.Ka4 f1Q 65.Kb5 c3 66.Kb6 c2 67.Kc5 Qa6 68.Kd5 c1Q 69.Ke5 Qc5) 56...Ke4 57.Kc4 (57.Kc3 f5 58.Kc4 f4 59.Kb5 f3 60.Kc6 c4 61.Kd6 f2 62.Ke6 c3 63.Kd6 f1Q 64.Kc5 c2 65.Kd6 c1Q 66.Ke6 Qc6 67.Ke7 Qff6) 57...f5 58.Kc5 (58.Kc3 f4 59.Kb3 f3 60.Kc4 f2 61.Kb5 f1Q 62.Kc6 c4 63.Kb6 c3 64.Kc6 c2 65.Kc5 Qa6 66.Kb4 c1Q 67.Kb3 Qac4) 58...f4 0–1. Skaloud,Dusan (1950) – Fang,Andy (1795), 26th Czech Rapid G1, 2015.

5.h3 Bf5 6.Nd4 (6.Ng3 Bg6=) 6...Bg6=+ 7.Nf3 e6 8.a3 Be7 9.g4 (9.Be2 0–0=+) 9...0–0–/+ 10.Rg1 Ne4 (10...a5 11.b5–/+) 11.d3=+ Bf6 12.c3 Nd6 13.Be2 (13.g5 Be7=+) 13...c5 14.h4 (14.Nbd2 b5=+) 14...c4–/+ (< 14...Bh4 15.g5 Nf5 16.e4 de4 17.de4+=) 15.h5 (15.g5 cd3 16.Bd3 Bd3 17.gf6 Qf6 18.Qd3 Qf3=+) 15...Bd3 16.Bd3 cd3 17.g5 Be7 18.Qd3 (18.h6 g6–/+) 18...Nc4 19.Qc2 e5 (19...Bd6 20.Nbd2 Ndb6 21.e4–/+) 20.Nbd2 (20.h6 g6 21.Nbd2 Ndb6–/+) 20...Nb2 21.Qb2 e4 22.c4 ef3 23.h6 f6 24.cd5 Ne5 25.Qd4 Qb6?? 26.Qe4?? Qb5 27.Nf3 Nf3 28.Qf3 fg5 29.Qe4 Bf6 30.Qe6 Rf7 31.Rc1 gh6 32.Rg4 Re8 33.Rc8 Rc8 34.Qc8 Kg7 0–1. Schmidt,Horst Hubert – Bohn,Thomas (2360), Oberliga Sued W, 1996.

4.f3 Bc8

5.a3 e6 6.f4 Nbd7 7.Nf3 c5 8.bc5 Bc5 =.

5.c4 Qd6 6.cd5 Nd5 7.a3 e5 8.e4 Nf6 9.d4 ed4 10.Bd4 Be7 11.Bc4 0–0?? (better is 11...Nc6 12.Ne2 0–0=) 12.Bf7?? (better is 12.e5 Qc6 13.ef6 Bf6 14.Bf6 Re8 15.Ne2 Qc4 16.Nd2+–) 12...Rf7–+ 13.Ne2 b6?? (13...Nc6 14.Nbc3–+) 14.0–0?? (14.e5!? Qe6 15.ef6 Bf6 16.Bf6 Qf6 17.Nbc3=) 14...c5?? (better is 14...Nbd7–+) 15.e5=+ Qd4?? (better is 15...Qc7 16.ef6 Bd6=) 16.Nd4+– 1–0. chevin – Hemi, Live Game Caissa's Web, 2004.

5.f4 e6 6.a3 a5 7.b5 Ne4 8.Nf3 Nd7 =.

4.f3 Bf5

5.a3 e6 6.Ne2 Bd6 7.Nd4 Bg6 8.Nb5 e5 =.

5.Ne2 Nbd7 6.Ng3 (6.g4 Bg6=) 6...Bg6=+ 7.c4 c6 (7...e5 8.b5=+) 8.cd5= cd5 9.Be2 h5 (9...e5 10.Qa4 Bd6 11.Nc3=+) 10.0–0= h4 11.Nh1 e6 12.a3 Bd6 13.Nc3 a6 14.Rc1 Nh5 (14...d4 15.ed4 Qb8 16.h3=+) 15.f4 Nhf6 16.Nf2 Bf5 17.Bf3 Nb6 18.Na4 (18.e4!? de4 19.Nce4 Bf4 20.Nf6 gf6 21.Bb7 Bh2 22.Kh1+=) 18...Nc4= 19.Rc4 dc4 20.Bb7 Ra7 21.Bc6 Nd7? (21...Kf8 22.Bd4 Re7 23.Nc5=) 22.Bd4 (22.Bg7!? Rg8 23.Bd4+–) 22...Rc7 23.Bb6 (< 23.Bg7 Rg8 24.Bd7 Rd7–/+ (< 24...Kd7 25.Be5+=)) 23...Ke7 (23...0–0 24.Bc7 Qc7 25.Bd7 Qd7 26.Nb2+/–) 24.Bc7 Bc7 (24...Qc7 25.Be4+/–) 25.Qe2 Bc2 (25...Nb8 26.Qc4 Qd2+–) 26.Nb2 Bb3 27.Nc4 Nb8 28.Bf3 Qd7 (28...g5 29.fg5 Bh2 30.Kh2 Qc7 31.Kg1 Qc4 32.d3+–) 29.d4 (29.Rc1 Rc8+–) 29...a5 (29...Qb5 30.Rc1 Rc8 31.Qd3+–) 30.Ne4 (30.Na5 Ba5 31.ba5 Rc8+–) 30...ab4 31.ab4 Bf4 (31...Qb5 32.Rc1 f5+–) 32.Nc5 (better is 32.ef4 Qd4 33.Ne3 Qb4 34.Qb2+–) 32...Bc4= 33.Qc4 Be3 34.Kh1 Qd4 35.Qb5 ½–½. Otte,Marco – Dodeman,Bartel, Wag.Intcomp, 1996.

5.f4 e6 6.a3 c5 7.bc5 Bc5 8.Nf3 Nbd7 9.Be2 Qb6 10.Bd4 Rc8 11.0–0 Bg4 12.Bc5 Qc5 13.Nd4 Be2 14.Qe2 0–0 15.a4 Ne4 16.a5 a6 17.Ra4 Rfe8 18.Na3 f6 19.Nb3 Qe7 20.Nd4 g6 (20...Qd8 21.Nb1–/+) 21.Rb1 e5 22.fe5 fe5 23.Nf3 Ndc5 24.Rab4 Nd6 25.c4 e4 26.Ne1 Qd8 27.cd5 Qa5 28.Nc4 Nc4 29.Rc4 b5 30.Rd4 Red8 31.d3 ed3 32.Nd3 Nd3 33.Qd3 Rc3 34.Qe4 Qc7 35.Qe6 Kg7 36.Rf1 Rc1 37.Rdf4 (37.Qa6 Rf1 38.Kf1 Rf8 39.Rf4 Rf4 40.ef4 Qf4 41.Ke2 Qe5 42.Kf3 Qd5 43.Kg3 Qg5 44.Kh3 Qf5 45.Kg3 Qd3 46.Kh4 Qe4 47.Kg3 Qe3 48.Kh4 g5 49.Kh5 Qe2 50.Kg5 Qg2 51.Kf5 Qc2 52.Kg5 Qg6 53.Qg6 hg6–+) 37...Rf1 38.Rf1 Qd7 39.Qe5 Kg8 40.Rd1 Qd6 41.Qd4 b4 42.e4 Re8 43.Rc1 Qe5 44.Qb4 ½–½. Jamieson,Ian (2000) – Bass,John (2085), Paington op, 2009.

5.g4= Bc8 6.c4 =.

5.g4= Bd7 6.g5 Ng8 7.f4 (7.a3 e6 8.f4 h6=) 7...Nc6 (7...e5 8.fe5 Qg5 9.Nf3=) 8.a3 e6 9.Bd3 (9.Nf3 Nge7=) 9...Nge7 10.Nf3 Rc8 (10...h6 11.Nc3=) 11.Nc3+= Ng6 (11...a6 12.Rb1=) 12.Ne2 (12.h4 Nge7+=) 12...Nce7 (12...a5 13.Ned4=) 13.Ng3 a5 (13...c5 14.bc5 Rc5 15.h4+=) 14.ba5 Ra8 15.Nh5 (15.h4 h5+=) 15...Rg8 16.h4 (16.Bc3 Ra7+=) 16...Ra5 (16...c5 17.Ng3 c4 18.Be2+=) 17.Ng3+= Nf5 18.Nf5 (18.Bf5 ef5 19.h5 Ne7+=) 18...ef5 19.h5 Nh8 (19...Ne7 20.Ne5+=) 20.Nd4 Qc8 (20...h6 21.gh6 gh6 22.Qf3+/–) 21.Qf3 Be6 22.0–0 c5 23.Nb3 Ra8+= 24.Bb5 (White gets the initiative) 24...Bd7 25.a4+/– Bb5 26.ab5 Ra1 27.Ra1 Qd8 28.c4 f6 29.Na5 Qd7 30.Qd5+– Qd5 31.cd5 b6 32.Nc6 Nf7 33.Ra8 Kd7 34.gf6 gf6 35.Kf1 Nd6 36.Rd8 Kc7 37.Bf6 Bg7 38.Rg8 Bf6 39.d3 (39...c4 40.dc4 Nc4 41.Ke2+–) 1–0. Woschkat,Karl_Heinz – Denzin, corr ICCF EU–I–GT–304, 1993.

5.g4 Bg6 6.a3 Qd6 7.c4 dc4 8.Bc4 Nc6 =.

5.g4 Bg6 6.h4 h5 7.g5 Ng8 (7...Nfd7 8.f4= (8.a3 e5 9.Bg2 f6 10.f4 c6 11.Ne2 Bd6 12.0–0 fg5 13.fg5 Nb6 14.Ng3+=; 8.Nc3 e6 9.a3 Bd6 10.f4 a5 11.Nb5 Bf8 12.ba5 c6 13.Nd4 Ra5 14.Ngf3=) 8...e5 9.fe5 Nc6 10.Nf3 Nb4 11.d3 Bc5 12.e6 fe6 13.Bg7 Rh7 14.Bd4=) 8.Ne2 (8.Nh3 Qd6 9.Nf4 Bf5 10.Bd3 Bd3 11.Nd3 Nc6 12.b5 Na5 13.Be5 Qd7 14.Nc3=) 8...e6 (8...e5 9.Be5 Nc6 10.Bf4 Nb4 11.d3 Bd6 12.Nbc3 Ne7 13.Rb1 Rb8 14.Nb5=) 9.Nf4 Bf5 10.c4 (10.a3 Ne7 11.Nc3 e5 12.Nd3 Nbc6 13.e4 de4 14.fe4+=) 10...Ne7 (worse is 10...Bb4 11.cd5 ed5 12.Qb3+/– Bd6 13.Bg7 Rh7 14.Qb7+=) 11.Nc3 (11.Rg1 Nd7 12.a3 a5 13.b5 Nb6 14.c5=) 11...c6 (11...d4 12.Ne4 e5 13.Nd3 Ng6 14.ed4+=) 12.cd5 (12.e4 de4 13.fe4 Bg4 14.Be2=) 12...cd5 (12...Nd5 13.Ncd5 ed5 14.Bh3=) 13.Rc1 (13.e4 Qd6 14.Nfd5=) 13...a6 (13...e5 14.Nd3=) 14.b5 (14.e4+=) 14...Nd7 15.ba6 ba6 16.Qa4 Nc8 17.Nd1 (17.e4 Ncb6 18.Qc2 de4 19.fe4 Bg4=) 17...Ncb6 18.Qb3 Qb8 (18...Nc5 19.Rc5 Bc5 20.Bg7+=) 19.Bd4 Qd6 20.a4 e5 21.Bb6 Nb6 (21...Qb6? 22.Qd5 Rb8 23.Bc4+–; worse is 21...ef4 22.Bd4+=) 22.a5 ef4 23.ab6 Rb8 24.b7 Bd7 25.ef4 Be7 26.Ne3 d4= 27.Nd5 0–0 28.Bd3 Bb5 29.Bb5 Rb7 30.Rc6 Qb8 31.Ra6 Re8 32.Ne7 Ree7= 33.Kf2 Rb5 34.Qa4 Qb7 35.Rc1 d3+= 36.Kg3 Rb1 37.Rac6 Rc1 38.Rc1 Qd5 39.Qa6 Kh7 40.Rc3+/– Rd7 41.Qc6 Qc6 42.Rc6 Rb7 43.Rd6 Rb3 44.f5 Rb5 45.f6 Rb2 46.Rd7 gf6 47.Rf7 Kg8 48.Rf6 Rd2 49.f4 Re2 50.Kf3 Rh2 51.Ke3 Rh4 52.Kd3 Kg7 53.Ke4 Rh1 54.Rh6 h4 55.Kf3 h3 56.Kg3 1–0. Buczinski,Henryk – Deforel,Jorge Eduardo, corr IECG WC–2014–P–00024, 2010.

5.c4 e6=+

6.a3 a5 =+.

6.a3 c6 7.d4 (7.cd5 ed5 (< 7...Qd5 8.e4 Ne4 9.fe4 Qe4 10.Qe2+=; 7...cd5?! 8.Bb5 Nbd7 9.d3=) 8.Ne2 Bd6=+) 7...Bd6 8.c5 Bc7 9.Bd3 Bg6 (9...Bd3 10.Qd3 Nfd7 11.Ne2=+) 10.Ne2= Nbd7 11.0–0 Nh5 (11...e5 12.Nbc3=) 12.g3 (12.b5 Bd3 13.Qd3 cb5 14.Qb5 Qb8=) 12...0–0 (12...Nhf6 13.Nbc3=) 13.Nbc3 e5 14.Rc1 (14.Bg6 fg6 15.e4 Ndf6+=) 14...Qe7 (14...Nhf6 15.Bg6 fg6 16.e4=) 15.Bg6 fg6 16.Qd3 (16.e4 Qe6=) 16...Qe6 17.Kg2 Rad8 18.Rf2 g5 (better is 18...Nhf6=) 19.h3 (19.e4 Qg6=) 19...e4 20.Ne4 (20.Qe4 de4) 20...de4–+ 21.Qe4 Qb3 22.Rc3?? (better is 22.Bc3–+) 22...Qb2 23.Qe6 Kh8 24.Qc4 Ndf6 25.g4 Nd5 26.gh5 Nc3 27.Qc3 Qc3 28.Nc3 Kg8 29.Ne4 Rfe8 30.Rf1 h6 31.Rd1 Re7 32.Rd3 Kf7 33.Nd2 g6 34.hg6 Kg6 35.Nc4 Red7 36.Kf2 h5 (37.a4 Re7–+; 36...Kh5 37.Nd2–+) 0–1. Marczyk,L – Gniazdowski,M, corr mem Chojecki A, 1996.

6.a3 Bd6 7.c5 Be7 8.Ne2 =+.

6.a3 Be7 =+.

6.c5 a5 7.a3 =+.

6.c5 Nbd7 7.d4 g5 (7...Be7 8.Ne2=+) 8.Bd3 (8.Ne2 g4=) 8...Bd3 9.Qd3 c6 (9...g4 10.fg4 Ng4 11.Nf3=) 10.Nd2 b5 (10...b6 11.Nh3=) 11.a4+= a6 (11...ba4 12.Qa6 Qc7 13.e4+=) 12.Ne2 Bg7 (12...g4 13.0–0+=) 13.0–0 (13.e4 ba4 14.Ra4 a5+/–) 13...0–0 (13...ba4 14.Ra4 a5 15.Rfa1+/–) 14.Ra3 Rc8 15.e4 Ne8 16.ab5 ab5 17.ed5 ed5 18.f4 g4+= 19.Ng3 Nef6 20.Nf5 Ra8 21.Ra8 Qa8 22.Ra1 Qd8 23.Re1 Re8 24.Re5 Ne5=+ (Black gets the initiative) 25.de5 Nh5= 26.Nd6 Rf8 27.Qf5 Qh4=+ 28.g3 Ng3 29.hg3 Qg3 30.Kf1 Bh6 31.e6 Qf4 32.Qf4 Bf4 33.e7 Bd2–+ 34.Ba3 Bg5 35.ef8Q Kf8 36.Nf5 Ke8 37.Kf2 Bf4 38.Nd4 Kd7 39.Ne2 Be5 40.Bc1 Ke6 41.Be3 h5 42.Bf4 d4 43.Bd2 Kd5 44.Nc1 Ke4 45.Ke2 f5 46.Nd3 f4 47.Nf2 Kf5 48.Kd3 h4 (49.Be1 h3–+) 0–1. Filipek,Jakub (2395) – Stryjecki,Marek (2275), Krynica op–A, 1998.

6.c5 Be7 7.Ne2 (7.g4 Bg6=+) 7...0–0 8.Ng3 Bg6 9.d4 Nbd7 (9...Nc6 10.a3=) 10.Nd2 (10.Nc3 b6=+) 10...Re8 (10...b6 11.Ba6 bc5 12.bc5=) 11.Nb3 Bf8 (11...Rb8 12.Bd3=) 12.Bd3 Bd3 13.Qd3 e5 14.0–0 e4 15.fe4 Ne4 (15...de4 16.Qc4=) 16.Ne4+= Re4 17.Nd2 Re6 18.Rae1 (18.e4 Qg5+=) 18...Qe7 19.Qf5 (19.e4!?+=) 19...Nf6 (19...Re3 20.Nf3 Nf6 21.Bc1=+) 20.e4 (20.Rf3 Re8=+) 20...g6 (20...de4 21.Re3=+) 21.Qf4 (21.Qf2 Ne4 22.Ne4 Re4 (22...de4 23.d5 e3 24.Qf7 Qf7 25.Rf7 Kf7 26.de6 Ke6 27.Re3 Kd5 28.Rd3 Kc4 29.Rd4 Kb5 30.a3=+) 23.Re4 de4=+) 21...Ne4 (21...de4!? 22.a3 Nd5–/+) 22.Ne4=+ Re4 (22...de4?? 23.d5 g5 24.Qf5+–) 23.Re4 de4 24.d5 f5 (24...a5!? 25.a3 f5=+) 25.g4= Bg7 26.Bg7 Qg7 27.gf5 Qd4 28.Qf2 e3 (< 28...Qb4 29.fg6 hg6 30.Kh1+/–) 29.Qe2 (29.Qf4 Qf4 30.Rf4 Rf8=) 29...Rf8 (29...Re8 30.fg6 hg6 31.Qd1=+) 30.fg6= Rf1 31.Kf1 hg6 32.d6 cd6 (32...Qe4 33.Kg1 cd6 34.cd6=+) 33.cd6 Qd6 (33...Qe4 34.Kg1=+) ½–½. Bothe,Michael – Mittendorf,Frank, Kassel op, 1999.

4.f3 Bh5

5.Bb5 c6 6.Be2 e5 =.

5.c4 e6 6.Qa4 Qd7 7.Qd7 Nbd7 =+.

5.c4 e6 6.Qb3 Nc6 7.a3 a5 (7...dc4 8.Bc4 Bd6 9.Bb5=) 8.cd5 (8.b5 dc4 9.Qa4 c3 10.bc6 cb2 11.cb7 Nd7+/–) 8...ed5 (8...Nd5 9.b5 a4 10.Qc4=) 9.b5= Nb8 10.Nc3 Bg6 11.Nh3 Bd6 12.Nf2 (12.Rc1 d4 13.Na4 Qe7=) 12...Be7 (12...Be5 13.f4 Bc3 14.Qc3+=) 13.Rc1 0–0 14.Be2 Qd6 (14...d4 15.Nce4 a4 16.Qd3 de3 17.de3 Qd3 18.Bd3=) 15.Na4 (15.0–0 Re8=) 15...Nbd7=+ 16.d4 (16.Qc3 Rfc8=) 16...Rfe8 17.0–0 Nf8 (17...Rad8 18.Nc5 Nc5 19.dc5=) 18.Rfe1 (18.Nc5 b6 19.Nb7 Qd7=+) 18...Rac8 (18...Ne6 19.Nc5=) 19.Nc5= b6 20.Ncd3 Qd8 (20...c5 21.bc6 Rc6 22.Rc6 Qc6 23.Rc1=) 21.Ne5+= Bd6 22.Nc6 Qd7 23.Bd3 Bd3 24.Qd3 Ng6 25.g3 Ne7 26.e4 de4 27.fe4 Ng4 28.e5 Nf2= 29.Kf2 Qh3 30.Ne7 Be7 31.Kg1 Bg5 32.Rcd1 Rcd8 33.d5+= Qg4 34.Re4 Qf5 35.Rf1 Qg6 36.Rf3 Bh6 37.Kg2 Rd7 38.Qc4 Red8 39.Rd3 Kh8 40.h3 Bg5 41.h4 Bh6 42.g4 f5 43.Red4 fg4 44.e6 Re7+= 45.Rg4 Qf5 46.Rf3 Qh5 47.Qe4 Kg8? 48.Rf5 Qe8 49.a4 g6 50.Bf6 Bg7 51.Be7 gf5+/– 52.Rg7! Kg7 53.Qe5 Kg8 54.Qg3 (54…Qg6 55.Qg6 hg6 56.Bd8+–) 1–0. Franic,Milan (2375) – Petrov,Jole (2255), CRO–ch Porec, 1994.

5.g4 Bg6 6.a3 Nc6 7.Bg2 e6 8.h4 h6 9.Ne2 (9.d3 Bd6=) 9...Bd6=+ 10.Nbc3 0–0 (10...a5 11.b5 Ne7 12.d3=) 11.Nb5 a6 (11...Ne8!?=) 12.Nd6+= Qd6 13.h5 (13.g5 Nh5+=) 13...Bh7 14.g5 hg5 15.h6 (better is 15.f4+=) 15...gh6?? (better is 15...e5=) 16.Bf6+– e5 (16...a5 17.b5 Ne5 18.Rh6+–) 17.Rh6 Qd7 (17...Ne7 18.Bg7! Kg7 19.Rd6 cd6+–) 18.Bh3 Qe8 (18...Qd6 19.Bf5! Rfe8 20.Bh7 Kf8+–) 19.Bf5! Bf5 (19...Bf5 20.Rh8) 20.Rh8# 1–0. michaelbuss – I need chocolate, ChessWorld.net, 2005.

5.g4 Bg6 6.a3 e6 7.h4 h6 8.Ne2 c5 (8...Nbd7 9.Nf4=) 9.Nf4 (9.bc5 Bc5 10.Nf4 0–0=) 9...cb4 10.Ng6 fg6 11.Bd3 Kf7 12.f4 Ne4 13.h5 gh5 14.gh5 Rg8 (better is 14...ba3!? 15.Na3 Nd7=) 15.Qg4 Be7 16.Be4 de4 17.ab4 Nd7 (17...Bb4 18.Qg6 Kf8 19.Qe6+–) 18.Qg6+– Kf8 19.Qe4 Bf6 (19...Qb6 20.Bd4 Qc6 21.Qc6 (21.Ra7?? Qe4 22.Ra8 Kf7–+) 21...bc6 22.Ba7+–) 20.Bf6 Qf6 21.Nc3 (21.Qb7 Qa1 22.Qa8 Ke7 23.Qg8 Qb1 24.Ke2 Qh1 25.Qg7 Kd6 26.Qh6 Qe4+/–) 21...Qe7 22.Qb7 Rb8 (22...Kf7 23.Ra7 Ra7 24.Qa7+–) 23.Qc7 (23.Qa7?! Rb4 24.Ra6 Ke8+–) 23...Rb4 (23...a6 24.Ra6 Rb4 25.Ra7+–) 24.Ra7 (24.Qa7?! Kf7+–) 24...Ke8 25.f5! Qd8 (25...ef5 26.Qc8) 26.Qg3 (26...Nf8 27.f6 Qf6 28.Qc7+–; < 26.fe6 Qc7 27.Rc7 Nb6+–) 1–0. michaelbuss – grimstad, ChessWorld.net, 2005.

5.Nh3 e6 6.Nf4 Nbd7 7.Be2 (worse is 7.Nh5 Nh5 8.Qe2 Qh4 9.Kd1 Qb4–/+) 7...Bg6 8.a3 Bd6 9.d4 Qe7 10.Nd2 e5 11.Ng6 hg6 (worse is 11...fg6 12.c4 ed4 13.Bd4=) 12.de5 Be5 13.Be5 Qe5 14.Nf1 a5 15.b5 0–0 16.Qd4 Qe7 17.Kf2 Nc5 18.Ng3 Rfe8 19.Rhe1 Rad8 20.Bd3 Qd6 21.Kg1 b6 22.Ne2 Ne6 23.Qc3 d4 24.ed4 Nd4 25.Ng3 Re5 26.Re5 Qe5 27.Qe1 Qc5 28.Qf2 Ne6 29.Ne2 Kf8 30.Qc5 Nc5 31.Rd1 Nd3 32.Rd3 Rd3 33.cd3 Ke7 34.Nc3 Kd6 35.d4 Nd5 36.Ne4 Ke7 37.g4 f5 38.gf5 gf5 39.Ng3 Nc3 40.Nf5 Kf6 41.Ne3 Nb5 42.Nc2 Kg5 (42...Ke6!?–+) 43.Kf2–/+ Kf4 44.Ke2 g6 45.Kf2 Nc3 46.Ne1 Nd5 47.Nd3 Kf5 48.Kg3 (48.h4 b5–/+) 48...b5 49.Kf2 b4 50.ab4 Nb4 51.Nc5 Nc2 52.d5 Nb4 53.Ke3 Nd5 54.Kd4 Nb6 55.Na6 Kf4 56.Nc7 Kf3 57.Kc5 a4 58.Kb6 a3 59.Nb5 a2 60.Nd4 Kg2 61.Nc2 Kh2 0–1. Linnanen,L (2175) – Pihlajasalo,H (2245), TCh–FIN, Finland FIN, 2009.

4.Nf3

4.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3).

4.Nf3 c6 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.Nf3 c6 5.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2).

4.Nf3 c6 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.Nf3 Nbd7 5.Be2 c6 6.0–0 e6 7.a3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3 Nbd7 7.0–0).

4.Nf3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 e6).

4.Nf3 e6 5.a3 Nbd7 6.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 e6 6.a3).

4.Nf3 e6 5.b5 Nbd7 6.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 e6 6.b5).

3.e3 g5

4.Na3 A) 4...g4 A1) 5.Ne2 Nbd7 (5...Rg8 6.Nf4 Nc6 7.Bf6 ef6 8.c3 Bh6 9.Bd3 a5; 5...Nc6 6.b5 Na5 7.Bc3 e5 8.Qc1 c6 9.Be5 Ba3; 5...Bg7 6.Nf4 0–0 7.h3 e5 8.Be5 Nc6 9.Bf6 Qf6) 6.c4 e5 7.Nc3 a5 8.Nd5 ab4 9.Nc2 Nd5; A2) 5.h3 Bg7 (5...Na6 6.Bf6 ef6 7.c3 f5 8.hg4 fg4 9.Rh5 Be6) 6.hg4 Bg4 7.Be2 h5 8.Nf3 Nc6 9.b5 Nb4; B) 4...a6 5.Nf3 Nc6 (5...Rg8 6.Bf6 ef6 7.c3 Nc6 8.Bd3 Bg4 9.Qa4 Bf3) 6.c4 Rg8 7.Nc2 e6 8.b5 ab5 9.cb5 Na5; C) 4...a5 5.b5 Nbd7 (5...Rg8 6.Nf3 g4 7.Ne5 Nbd7 8.Bd3 e6 9.Nd7 Bd7) 6.Be2 Bg7 7.Nf3 g4 8.Ne5 Ne5 9.Be5 Rg8.

4.c4 dc4 5.Bc4 Nc6 6.b5 Nb4 7.Qb3 Nd3?? (better is 7...e6+=) 8.Bd3 Nd5 (8...Be6 9.Qc2 Bg7+–) 9.Bh8 f6 (9...h6 10.Nf3+–) 10.Bh7 b6 (10...Qd6 11.h4+–) 11.Bg8 (11.Bg6 Kd7 12.Qd5) 11...e6+– 12.Qd1 (12.Nc3 Nc3 13.dc3 c6+–) 12...f5 (12...Bb4 13.Qh5 Kd7 14.Qf7 Kd6 15.e4+–) 13.Qh5 Kd7 14.Qf7 (better is 14.Nf3 Bd6 15.Qg6+–) 14...Be7 (14...Qe7 15.Qg6 c5+–) 15.Qe6 Ke8 16.Qf7 (16.Qg6 Kd7 17.Qc6) 16...Kd7 17.Qd5 (17.Qf5 Ke8 18.Qg6 Kd7 19.Qc6) 17...Ke8 18.Qc6 (18.Qf7 Kd7 19.Qf5 Ke8 20.Qg6 Kd7 21.Qc6) 18...Bd7 19.Qg6 Kf8 1–0. Valpa – LADY, playchess.de, 2002.

4.c4 Nc6 5.b5 Na5 6.cd5 Bg7 7.Qa4 b6 8.Nf3 g4 9.Bf6 Bf6.

4.c4 Bg4 5.Qb3 (5.Nf3 Nc6 6.b5 Na5 7.cd5 Qd5 8.Qa4 Bf3 9.Nc3 Qd7) 5...e5 (5...d4 6.h3 Bh5 7.ed4 a5 8.b5 Nbd7 9.Qe3 Nb6) 6.h3 Bh5 7.Nf3 Bf3 8.gf3 d4 9.h4 Rg8.

4.c4 Bg7= A) 5.h4 g4 6.cd5 c6 7.Qa4 Bd7 8.d6 ed6 9.Nc3 Na6; B) 5.Nc3 0–0 (5...Nc6 6.Nf3 g4 7.cd5 Nd5 8.b5 gf3 9.bc6 fg2) 6.cd5 Nd5 7.Nf3 Nb4 8.Ng5 Nd3 9.Bd3 Qd3; C) 5.cd5 0–0 6.h4 g4 7.Bf6 Bf6 8.Nc3 c6 9.Nge2 Na6.

4.Nf3 a6 5.Be2 (5.Ng5 Nc6+/– 6.a3 Bf5 7.Bd3 Bd3 8.cd3 Qd6 9.Nf3 Rg8; 5.a3 Bh6 (5...Nc6 6.Ng5 Bf5 7.Bd3 Bd3 8.cd3 Qd6 9.Nf3 0–0–0; 5...g4 6.Bf6 ef6 7.Nd4 c5 8.bc5 Bc5 9.Nb3 Be7) 6.h4 g4 7.Bf6 ef6 8.Nd4 Nc6 9.Nc6 bc6; 5.c4 Nc6 (5...g4 6.Ne5 Nc6 7.Qa4 Qd6 8.c5 Qe6 9.Na3 Kd8) 6.cd5 Qd5 7.Nc3 Qf5 8.Qa4 Bd7 9.b5 Ne5) 5...h6 (5...Qd6 6.a3= (6.Be5 Qb4 7.Nc3 Qa5 8.Nd4 c6 9.h4 Nbd7) 6...Nc6 7.h3 Bf5 8.Nc3 d4 9.Nd4 Nd4; 5...Nc6 6.Ng5 Rg8 7.h4 h6 8.Bf6 ef6 9.Nh3 Bb4; 5...Rg8 6.Ne5 Bg7 7.0–0 Nc6 8.Nc6 bc6 9.Bd4 a5) 6.0–0 (6.Bf6 ef6 7.c3 (7.a3 Nc6 8.Nc3 Be7 9.0–0 0–0) 7...Nc6= 8.Na3 Bd6 9.Nc2 0–0; 6.c4 Nc6 7.cd5 Qd5 8.Nc3 Qd8 9.Ne4 Bf5) 6...b5 (6...Bg7 7.c4= dc4 8.Bc4 Nc6 9.Ne5 0–0; 6...Nc6 7.a3 Bg7 8.Nc3 Bf5 9.Na4 Qd6) 7.a3 (7.a4 ba4 8.c4 Bd7+= (8...Bg7 9.Qa4 Nbd7) 9.cd5 Bg7) 7...Nc6 (7...e6 8.d3+= (8.Ne5 Bd6 9.f4 0–0) 8...Nc6 9.Nbd2 a5) 8.Nc3 (8.a4 ba4 (worse is 8...Nb4 9.ab5 Bf5 10.Nd4+–; 8...Bd7 9.Nc3 Nb4) 9.Bf6 (9.Ne5 Qd6) 9...ef6+=; 8.Ne5 Bb7 9.Nc6 Bc6) 8...e6 (8...g4 9.Ne1= (9.Nh4 Qd7) 9...Qd6; 8...Qd6 9.a4 g4) 9.d4 (9.a4 ba4+/– (9...g4 10.Nd4 Nd4 11.ed4 ba4 12.Ra4 Rb8=)) 9...Bd6 10.g3 (better is 10.Bd3=) 10...e5?? (better is 10...Bb7=) 11.de5+– Be5 12.Ne5 Ne5 13.f4 Nc4 (13...gf4 14.ef4 Ng6 15.Nb5 ab5 16.Bb5 Kf8+/–) 14.Bc1?? (14.Bc4 bc4 15.fg5 hg5 16.Nd5 Nd5 17.Bh8 Be6+–) 14...Bf5?? (14...Bh3 15.Rf2 Rb8 16.Qd4 gf4 17.Qf4+/–) 15.a4 0–0? 16.ab5 ab5 17.Ra8 Qa8 18.Nb5 c6? 19.Nd4 Bd7? 20.fg5 Nh7 21.gh6 Qe8 22.Qd3 Ne3 23.Be3 Qe5 24.Nf3 Qd6 25.Bc5 Qg6 26.Qg6 fg6 27.Bf8 Kf8 28.Ne5 Ke8 29.Ng6 Bh3 30.Rf4 Be6 31.Bh5 Kd7 32.Nf8 Nf8 33.Rf8 Ke7 34.Re8 Kd6 35.h7 1–0. Neumann,Frank (1635) – Korn,Lothar, remoteschach.de, 2010.

4.Nf3 g4 5.Ne5= Nc6 (5...Bg7 6.Bd4 a5 7.b5 Qd6 8.Bd3 h5 9.Nc3 Nbd7) 6.Bb5 Qd6 7.Bd4 a6 8.Bc6 bc6 9.a3 a5.

4.Bf6 ef6 5.a3 a5 =.

4.Bf6 Rg8?? 5.Bb2 e6 6.a3 c5 7.c4 a5 8.ba5 Ra5 9.cd5 Qd5 10.Nc3 Qd8 11.Qc2 f5 12.Be2 g4 13.h3 h6 14.hg4 Qg5 15.f4 Qg6 16.g5! hg5 17.Bh5 gf4 18.Bg6 Rg6 19.Kf2 e5 20.ef4 c4 21.Re1 e4 22.Ne4! fe4 23.Re4 Be6 24.Qc4 Bc5 25.d4 Kf8 26.Re6 Kg7 27.dc5 Rf6 28.Bf6 Kf7 29.Ra6 (29...Ke8 30.Qe6 Kf8 31.Rh8; 29.Re7 Kg6 30.Qe4 Kf6 31.Qe6) 1–0. wlittle (1985) – bjhaskins, net–chess.com, 2002.

3.e3 g6

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 d5).

4.a4 Bg7 5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a4).

4.c4 dc4 5.Bc4 Bg7 6.Nf3 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4 dc4 7.Bc4).

4.Be2 Bg7 5.Nf3 0–0 6.0–0 c6 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5 7.0–0).

4.a3 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.a3 d5).

5.c4 0–0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.a3).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

5.Nf3 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.a3).

4.c4 c6

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 g6).

5.a4 Bg7 6.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.a4 d5).

5.c5 Bg7 6.d4 0–0 7.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.c5).

5.Nf3 Bg7 6.a4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.a4 d5).

5.Nf3 Bg7 6.b5 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.b5).

5.Nf3 Bg7 6.Nc3 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nc3).

5.Nf3 Bg7 6.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

5.Nf3 Bg7 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

5.Nf3 Bg7 6.Be2 0–0 7.0–0 Bg4 8.d4 e6 9.Nbd2 Nbd7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4 8.Be2 Nbd7 9.0–0 e6).

4.c4 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d5).

5.Qb3 0–0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4).

5.cd5 0–0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.cd5).

5.Nf3

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.c4).

5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5).

5.Nf3 0–0 6.d4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

5.Nf3 c6 6.a4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.a4 d5).

5.Nf3 c6 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

4.d4 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.d4 d5).

5.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.d4).

4.Nf3 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5).

5.a3 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.a3).

5.c4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5).

5.c4 0–0 6.Nc3 c6 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nc3).

5.c4 0–0 6.Be2 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

5.c4 dc4 6.Bc4 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4 dc4 7.Bc4).

5.c4 c6 6.a4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.a4 d5).

5.c4 c6 6.Nc3 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nc3).

5.c4 c6 6.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

5.c4 c6 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

5.d4 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4).

5.d4 0–0 6.c4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

5.d4 0–0 6.Nbd2 Bg4 7.c4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 Bg4).

5.Be2 0–0 6.0–0 c6 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5 7.0–0).

5.Be2 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.Be2).

5.Be2 0–0 6.d3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.d3 0–0 6.Be2).

5.Be2 b6 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 b6).

5.Be2 Nbd7 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 Nbd7).

4.f4 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 d5).

5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5).

5.Nf3 0–0 6.Be2 c6 7.0–0 Bg4 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 Bg4 7.0–0 c6).

5.Nf3 Nbd7 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 Nbd7).

5.Nf3 e6 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.f4 0–0 5.Nf3 d5 6.Be2 e6).

3.Nf3 a5

4.ba5 c5 5.e3 e6 6.Bc3 Bd6 7.Be2 0–0 8.0–0 Nc6 Increasing the pressure on the isolated pawn on a5 9.d4 Na5 10.dc5 Bc5 11.Bd4 Bd4 12.ed4 Ne4 13.Bd3 f5 14.Nbd2 Nc6 15.c4 Nb4 16.Be4 (better is 16.Qb3!? Nd3 17.Qd3=) 16...de4–/+ (worse is 16...fe4 17.Ne5=) 17.Qb3 (17.a3 Nc6 (17...ef3?! 18.ab4 Ra1 19.Qa1=) 18.Ne5 Qd4 19.Nc6 bc6–/+) 17...ef3 18.Qb4 fg2 19.Kg2 Qd4 20.Nb3 (20.a3 Rd8 21.Ra2 e5–+) 20...Qg4 21.Kh1 Qf3 22.Kg1 Bd7 23.Nd2 Qf4 (23...Qg4 24.Kh1 Bc6 25.f3–+) 24.f3 Bc6 25.a4 Rad8 26.Qc3?? (26.Rf2–+) 26…Rd2 (26...Rd2 27.Rf2 Rf2 28.Kf2 Qh2 29.Kf1 Rd8–+) 0–1. chesspal (2570) – eik (2570), net–chess.com, 2013.

4.b5 c5 5.e3 Bg4 6.Be2 Nbd7 7.a4 e6= 8.d3 Rc8 (8...Bd6 9.h3 Bf3 10.Bf3=) 9.Nbd2 h6 10.h3 Bh5 11.0–0 Be7 12.c4 0–0 13.e4 Re8 (13...de4 14.Ne4 Qc7 15.Qb3=) 14.Qb3 (14.e5 Nh7+/–) 14...Bg6 (14...d4 15.e5 Ne5 16.g4 Bg4 17.hg4 Neg4 18.Rfe1=) 15.cd5+= ed5 16.e5 (16.ed5 Nb6 17.Rfe1 Nfd5+=) 16...Nh5 17.Rfe1 (better is 17.g3!?+=) 17...Nf4+= 18.Bf1 Nd3 19.Bd3 c4 20.Bc4 dc4 21.Nc4 Nc5 22.Qa2 Nd3 23.Red1 Bc5 24.Rd2 (24.Ba3 Ba3 25.Na3 Qc7+=) 24...Bb4–/+ 25.Rdd1 Qc7 (25...Be4 26.e6 Qd5 27.Nce5 Qa2 28.Ra2 Ne5 29.Be5 Re6 30.Bf4+=) 26.Ne3–/+ Bc5 (26...Nb2 A) 27.Qb2? Bc3 28.Qa3 Ba1 (28...Be5?! 29.Rac1 Qb8 30.Ne5 Qe5 31.Rc8 Rc8 32.Qd6 Qd6 33.Rd6=) 29.Qa1 Red8–+; B) 27.Nd5 Qc2 28.Nb4 ab4 29.Rd2+=) 27.Rd2 (27.Qb3 Rcd8 28.Rd2+=) 27...Qb6 (better is 27...Be4 28.Rad1 Bf3 (28...Nb2?? 29.Rd7 Re7 30.Rc7 Rec7 31.Qb2+–) 29.gf3 Ne5 30.Be5 Qe5–/+ (30...Re5?! 31.Rd7 Rg5 32.Kf1=)) 28.Nd1?? (better is 28.Nc4 Bf2 29.Kh1+=) 28...Be4–+ 29.Qb3 (29.Nc3 Bf2 30.Kh2 Nb4–+) 29...Qg6 30.Kf1? (30.Nh4 Qg3 31.Rd3 Qd3 32.Qd3 Bd3 33.Nf3–+) 30...Nf4 31.g3 (31.g4 Nh3 32.e6 Re6–+) 31...Bd3 (31...Nh3?! 32.Nh4 Qh5 33.f3–+) 32.Kg1 Qg3 0–1. Valenta,Vit (2195) – Holeksa,Zdenek (2180), CZE–ChT2F, 2010.

4.b5 Nbd7 5.e3 Nb6 6.Bd3 e6 7.Nc3 a4 8.a3 Bd6 9.e4 de4 10.Ne4 Ne4 11.Be4 Nc4 12.Bg7 Rg8 13.Bd4 Na3 14.Qe2 Bd7 15.c4+= Rg4 16.Rc1 c5 17.bc6 Bc6= 18.Bc6 bc6 19.0–0 Rb8 20.h3+/– Rg6 21.Ne5 Be5 22.Qe5 Rb3 23.Be3 Qd3 24.Qc7 Kf8 25.Qc6+– Nb1 26.Rfd1 a3 27.Qf3 a2 28.Qa8 Kg7 29.Qa2 Na3 30.Qa1 Kg8 31.g3 Qe4 32.Qd4 Qd4 33.Bd4 Rd3 34.Bb2 Rb3 35.Ba1 Rb8 36.Rc3 (36.Rc3 Nb1 37.Re3+–) 1–0. Karl Gill – marekt, ChessWorld.net, 2009.

4.b5 Ne4 5.d3 Nc5 6.g3 Bd7 7.a4 c6 8.c4 dc4 9.dc4 f6 10.Bg2 e5 11.0–0 cb5 12.cb5+= Qb6 13.Nbd2 Be6 14.Rc1 Be7 15.Qc2 0–0 16.Ne1 Nbd7 17.Nd3 Rac8 18.Nc4 Qa7 19.Rfd1 Bf5 20.Ne3+= Bg6 21.Ba1 e4 22.Nc5 Nc5 23.Bd4 b6 24.Bc5 Rc5 25.Qb1 f5 26.Nd5 ½–½. Old Sisyphus – michaelanthony, ChessWorld.net, 2005.

4.b5 a4

5.a3 Nbd7 6.e3 e6 7.Be2 =.

5.a3 Nbd7 6.e3 h6 7.Be2 e5 8.Ne5+/– Ne5 9.Be5 Ne4 10.0–0 Bd6 11.Bd6 Qd6 12.d3 Qf6 13.Ra2 Nd6 14.c4 Be6 15.Nd2 dc4+= 16.dc4 Nb5 17.Ne4 Qe5 18.Qc2 Bf5 19.Bf3 Be4 20.Be4 Nd6 21.Bf3 Ra5 22.Rb2 0–0 23.Rfb1 Rc5= 24.Bb7 Rc4 25.Qd1 Rb8 26.h3 Qc5 27.Kh2 (27...Qa3 28.Qd5=+; better is 27.Ba6 Rb2 28.Rb2+=). giving up claim a win – amoruritme, ChessWorld.net, 2005.

5.a3 e6 6.e3 =.

5.e3 e6 6.c4 c6 7.Be2 Be7 8.0–0 0–0 9.d4 dc4 10.Bc4 cb5 11.Bb5 Bd7 12.Bd7 Nbd7 13.Ba3 b5 14.Be7 Qe7 15.Nc3 Qb4 16.Qd2 Rac8 17.Ne4 Qa3 18.Nf6 Nf6 19.Rab1 Ne4 20.Qb2 Qb2 21.Rb2 Nd6 22.Ne5 Rc3 23.Nd7 Rfc8 24.Nc5 a3 25.Re2 h6 26.f3 Nc4 27.Rfe1 Nb2 28.Ne4 Rc2 29.Nd6?? Re2–+ 30.Re2 Rc1 31.Kf2 b4 32.Nb5 b3! 33.ab3 0–1. Douville,F (1690) – Robveille,L (1915), 4th Open, Angers FRA, 2009.

5.e3 Bg4 6.c4 e6 7.a3 Ne4 8.d4 dc4 9.Bc4 Nd7 10.0–0 Ndf6 11.Be2 Bf3 12.Bf3+= Qd7 13.Qd3+/– Nd6 14.Nc3 Ra5 15.Rac1 Nb5= 16.Bb7 c6 17.d5 ed5 18.Nd5!+– Qb7 19.Nf6 gf6 20.Bf6 Bd6 21.Bh8 (21...Ba3 22.Rfd1+–) 1–0. Skulsky,I – Vancouver,H, 1988.

3.Nf3 a6

4.a3 e6 =.

4.a3 h6 5.d3 Qd6 6.d4 e6 7.c4 dc4 8.e4 Qd8 (8...Ne4 9.Bc4 Be7 10.d5–/+) 9.Bc4 (9.e5 Nd5 10.Bc4 b5 11.Bd5 ed5=) 9...b5 (9...Ne4 10.0–0+=) 10.Bb3 (10.Bd3 Bb7 11.Qc2 Nh5+=) 10...Bb7 11.0–0 Nh7?? (better is 11...Ne4 12.Re1 Nf6+=) 12.d5+/– ½–½. Radwan,Jan (1740) – Sarnowski,Ryszard, Rowy/Fregata Poland, 2009.

4.a4 e6 5.e3 c6 (5...Bb4 6.Bd3–/+) 6.Be2 Bb4 7.0–0 0–0 8.c3 Bd6 9.Qc2 (9.c4!?+=) 9...e5–/+ 10.Ng5 (better is 10.d3!?–/+) 10...h6–+ 11.Nf3 e4 12.Nd4 Qc7 13.h3 c5 14.Nb3 Be6 (14...Nc6 15.c4 Nb4 16.Qc1 dc4 17.Bc4–+) 15.a5 (better is 15.c4 Nc6 16.Bf6–+) 15...Qd7 (15...Nc6 16.Na3 Rfd8 17.c4–+) 16.f4? (better is 16.c4 Qe7 17.cd5 Bd5 18.Nc3–/+) 16...ef3! 17.Rf3 (17.Bf3 Bf5 Combination; 17.Rf3 Nc6 Combination; 17.gf3 Bh3 Deflection) 17...Ne4 18.Ba3 Nc6 19.d4 c4 20.Nc5 Nc5 21.dc5 Bc7 22.Bb4? (22.Nd2 Ba5 23.Re1 d4 24.Nc4 Bc4 25.Bc4 Bc3–+) 22...Nb4 (better is 22...d4 23.cd4 Nb4 24.Qd2–+) 23.cb4 Rae8 24.Nc3 Be5 (better is 24...d4!? 25.ed4 Qd4 26.Kf1–+) 25.Rd1 Bc3 (25...Qc6!? 26.Rf2 Re7 27.Bf3–+) 26.Qc3–/+ Bf5 (better is 26...Qe7!?–/+) 27.Bc4= Be4 28.Rg3 f6 29.Qd4 Re5 30.Be2 (30.Rg4!? Qe6 31.Qe4 de4 32.Be6 Re6 33.Rf4+=) 30...Kh8 31.Bg4 Bf5 32.Bf3 Be6 33.Rc1 Qc7 34.Kf2 Rg5 35.Rg5 fg5 36.Ke2 Rd8 37.Rf1 Qc6 (37...Qg3 38.Bg4 Bg8 39.Bf3=) 38.Kf2 Rf8 39.Kg1 Qd7 40.g4 (40.e4!? Rf4 41.g3+/–) 40...h5 41.Kg2 h4 42.Qe5 Qe7 43.Kg1 (worse is 43.Bd5 Rf1 44.Kf1 Qf7 45.Ke1 Bd5 46.Qg5 Qf3 47.Qd8 Kh7 48.Qh4 Kg6 49.Qh5 Kf6–/+) 43...Kh7 44.Bg2 (44.Bd5 Rf1 45.Kf1 Qf7 46.Ke1 Bd5 47.Qg5 Qe6 48.Qh4 Kg6 49.Qh5 Kf6 50.Qh4 Kf7 51.Qf2 Qf6–/+) 44...Rf1 45.Bf1 Qf6?? (better is 45...Kg6+=) 46.Qf6+– gf6 47.c6! Bc8 (47...bc6 48.Bd3 Double attack (48.Ba6 Deflection; 48.Bd3 Decoy)) 48.Bd3 Kg7 49.Bf5 (49.Bf5 bc6 50.Bc8+–) 1–0. alexp (2505) – itsmenow (2205), net–chess.com, 2015.

4.d3 Bf5 5.Nbd2 h6 (5...e6!?+=) 6.c4= c6 7.Nd4 Bh7 8.e3 (8.cd5 cd5 9.Qb3 Nbd7=) 8...e6 9.Be2 (9.Qb3!?=) 9...Nbd7 10.c5 1–0. croach (2360) – dsteel (2230), net–chess.com, 2015.

4.e3 Qd6 5.a3 Bg4 6.Be2 Qb6 (6...Nbd7 7.h3 Bf3 8.Bf3=) 7.Nc3 c5 (better is 7...Nbd7!?=) 8.Na4+/– Qc7 9.Be5 Qc6 10.Nc5 Bf3 11.Bf3 b6 (11...Nfd7 12.Bb8 Nc5 13.Be5+/–) 12.Nb3 (12.Bf6 bc5 13.Bb2 cb4 14.ab4 e6+–) 12...Nbd7+/– 13.Bb2 e6 14.0–0 (14.Rc1 e5+/–) 14...Bd6 15.Rc1 Qc7 (15...Ne5 16.Be5 Be5 17.d4+/–) 16.g3 (16.c4 Bh2 17.Kh1 Qd6+–) 16...Ne5 (16...b5!?+/–) 17.Be5+– Be5 18.c4! Qb8 (18...dc4 19.Ba8 Pinning (19.Ba8 Deflection)) 19.d4 Bc7? (19...Bd6 20.Nd2+–) 20.Nd2 (better is 20.cd5!? ed5 21.Qc2 Ra7 22.Qc6 Ke7 23.Bd5 Rd8+–) 20...Ra7 (20...0–0 21.cd5 Nd5 22.Qc2+–) 21.cd5 Nd5 22.e4 (22.Bd5 ed5 23.Qa4 Kd8+–) 22...Ne7 23.d5 0–0 (23...ed5 24.ed5 0–0 25.Re1+/–) 24.de6+– fe6 25.Qb3 Rf6 (25...Kh8 26.Qe6 Be5 27.Nc4 Rf3 28.Qe5 Qe5 29.Ne5 Ra3 30.Nc6 Nc6 31.Rc6+–) 26.Bg4 Qc8 (26...b5 27.Be6 Kh8 28.Kg2+–) 27.Rc2 (27.Nf3!? Kh8+–) 27...Qd7 (27...Rg6 28.h3+–) 28.Nf3 (28.Rfc1 Rb7+–) 28...Ng6 29.Ng5 Nf8 30.Rd1 Qe7 (30...Qe8 31.Rdc1 h6 32.Rc7 Rc7 33.Rc7 hg5 34.Ra7+–) 31.Rc6 Rg6 (31...Kh8 32.Ne6 a5 33.f4+–) 32.Be6 Ne6 (32...Kh8 33.Nf7 Qf7 34.Bf7 Rc6+–) 33.Ne6 Kh8 34.Rc7 (34.Rc7 Rc7 35.Rd8 Qd8 36.Nd8+–) 1–0. zabazaba (1660) – dm1980 (1645), gameknot.com, 2014.

4.e3 Bd7 5.c4 dc4 6.Bc4 b5 7.Be2 e6 8.a3 Be7 9.0–0 Nc6 10.d4 0–0 11.Nbd2 h6 12.Nb3 Nh7 (12...a5!?+=) 13.Nc5 Qc8? (13...Bc5 14.dc5 Qe7 15.a4+/–) 14.Qc2 (14.Nd7 Qd7 15.Qc2 Rfb8+–) 14...Ng5? (14...Bc5 15.dc5 Re8 16.Bc3+/–) 15.Rab1 (better is 15.Nd7!? Qd7 16.Rfc1 Na7+–) 15...a5 16.Ra1 (better is 16.Ng5 hg5 17.Nd7 (17.Bb5?! Nd4 18.Bd7 Nc2 19.Bc8 Rfc8+=) 17...Qd7 18.Bf3+–) 16...ab4+= 17.ab4 (worse is 17.Bb5 Nf3 18.gf3 Nd4 19.Bd4 Bb5–+; 17.Nd7?! Qd7 18.Ng5 hg5+=) 17...f5?? (better is 17...Nb4 18.Qb3 Bc5 19.dc5 Nf3 20.Bf3 Ra1 21.Ra1 Nc6+=) 18.Ra8+– Qa8 19.Ra1 Qd8 20.Qc3 Ne4 21.Ne4 fe4+= Attacks the isolani on b4 22.Nd2 Bh4?? 23.f3?? ef3+/– 24.Nf3 Bf6 25.Bb5 Ne7 26.Be2 Nd5 27.Qb3 Qe7 28.Kf2 Nb4 29.Ba3+/– Rb8 30.Rb1 Bh4?? 31.g3+– Nd3 32.Qd3 Rb1 33.Be7 (33.Be7 Rb2 34.gh4+–) 1–0. Darkseid – groovenetwork, ChessWorld.net, 2013.

4.e3 Nbd7 5.c4 c6 6.d4 b5 7.c5 Ne4 8.Nbd2 Ndf6 9.Bd3 Bf5 10.Qc2 (10.Ne5 Nd2 11.Qd2 Bd3 12.Qd3 Qc8+/–) 10...Bg6 11.Ne5 Nd2 12.Bg6 (12.Qd2!? Bd3 13.Qd3+/–) 12...hg6+= 13.Nc6?? (better is 13.Qd2 Qc7 14.a4+/–) 13...Qc7 14.Qd2 Qc6 15.h3 Ne4 16.Qc2 e6 17.a4 Rb8 18.ab5 ab5 19.0–0 Be7 20.Ra7 Bh4 (20...Ra8 21.Ra8 Qa8 22.f3–+) 21.g3? (21.Qd3 0–0–+) 21...Bf6 (better is 21...Bd8!? 22.Kg2 Bb6–+) 22.Kg2 Ra8 23.Ra8 Qa8 24.f3 Ng5 25.h4 Nh7 26.c6 0–0 27.Ra1 Qc8 28.Ra5 (28.Qc5 g5 29.hg5 Ng5=) 28...Bd8 (better is 28...Qc7!? 29.Rb5 Rc8–/+) 29.Rb5= Bc7 (better is 29...g5!?=) 30.Rb7+/– Nf6 31.b5 Ne8 32.b6 Nd6?? (better is 32...Bb6 33.Rb6 Nd6+–) 33.Rc7 (33.bc7?! Nb7 34.cb7 Qb7=) 33...Qb8 (33...Qa6 34.b7 Nc4+–) 34.Qc5 Nc4 35.Rb7 White prepares the advance c7 35...Qa8 (35...Ne3 36.Kf2 Nd1 37.Ke2 Qg3 38.Qf8 Kf8+–) 36.Ra7 Qd8 (36...Nb6 37.Ra8 Na8+–) 37.c7 Ne3 38.Kg1 Qf6 39.Qf8! Kf8 (39...Kf8 40.c8R) 40.c8Q 1–0. Schroeder,Ralf (1670) – Schmole_Rostosky,Joachim, Lichtenberger Sommer, 2015. (=1.Nf3 Nf6 2.e3 d5 3.b4 a6 4.Bb2 Nbd7)

4.h3 Nc6 5.a3 e5 (5...d4 6.e3 de3 7.de3 Qd1 8.Kd1=) 6.Be5 (6.Ne5!? Ne5 7.Be5+=) 6...Ne5=+ 7.Ne5 Bd6 8.Nd3 0–0 9.c3 Bf5 10.Qb3 (10.Nc5 Ne4 11.d4 Qf6 12.Ne4 Be4=) 10...Re8 (10...Bd3 11.ed3 Re8 12.Be2 Qe7–+) 11.f3?? (better is 11.Nc5 Ra7 12.e3=+) 11...Bd3–+ 12.g4 (12.Kd1 Bc4 13.Qc2 a5–+) 12...Qe7 (better is 12...Ne4!? 13.fe4 Be4 14.Bg2 Bg2 15.Rg1 Bh3 16.Kd1–+) 13.Bg2 (13.e3 Bf1 14.Rf1 Bg3 15.Kd1–+) 13…Qe2 0–1. toon magpie – dugmak, ChessWorld.net, 2005.

4.a3 Nc6

5.d4 g6 6.e3 Bg7 7.Bd3 0–0 8.c4 e6 (8...e5!? 9.cd5 Nd5 10.de5 Qe7+=) 9.Nbd2+= Bd7 10.0–0 Rc8 11.Qb3 dc4 12.Nc4 Nd5 13.Rac1 b5 (13...Qe7!?+=) 14.Nce5+/– Ne5 15.Ne5 Be5 (15...f6 16.Nd7 Qd7 17.Rc5+/–) 16.de5 Qe7 17.Bd4 Rfe8 18.f4 Qh4 19.Rf3 Qe7 20.g4 White intends f5 (20.e4 Nb6 21.f5 Nc4 22.fg6 fg6 23.Bc4 bc4 24.Qc4 Bb5+–) 20...Kh8 (20...Qh4!?+/–) 21.Rh3+– c6 (21...a5 22.Bc5 (worse is 22.ba5 c5 23.Bb2 c4 24.Bc4 bc4 25.Rc4 Rc4 26.Qc4 Rc8–+) 22...Qd8 23.ba5+–) 22.Rf1 (22.Bc5 Qd8+–) 22...Rg8 (22...c5 23.bc5 Rc5 24.e4+– (worse is 24.Bc5 Qc5 25.Qc2 Qc2 26.Bc2 Rc8+–)) 23.Kh1 (better is 23.e4 c5 24.bc5+– (24.ed5?! cd4 25.d6 Qd8+/–)) 23...Rcf8? (23...c5 24.Bc5 Rc5 25.bc5 Qc5 26.e4+–) 24.f5 (better is 24.e4 Nc7 25.Bc5+–) 24...Bc8?? (better is 24...Qg5+–) 25.f6 Qb7 26.Bc5 Rd8 (26...Qb8 27.Bd6 Qb7 28.e4+–) 27.Be2 a5 (27...Qc7 28.e4 h5 29.Qg3 Nf6 30.Rf6+–) 28.e4 a4 (28...h5+–) 29.Rh7!! 1–0. Barbarickiy,Yuri – Arkhireev,Vladimir, Agaea. eia, 2008.

5.e3 Bf5 6.Be2 e6 7.Nh4 Bg6 8.0–0 Bd6 9.f4 Qe7 10.Ra2 Be4 11.d3 Bg6 12.Bf3 Nd7 (12...Rd8!?+=) 13.Bg7 Rg8 14.Ng6 hg6 15.Bb2 f6 16.c4+– dc4 17.dc4 Qf7 18.Bc6 bc6 19.c5 Bf8 20.Qa4 e5 21.Qc6 Qa2 22.Qa8 Ke7 23.Nc3 Qb2 24.Nd5 Kf7 25.Qd8 Ke6 26.Nc7 Kf7 27.Qe8 Kg7 28.Qd7 Kh8 29.Qh3 Kg7 30.Ne8 Kf7 31.Qd7 Be7 32.Nd6 Kf8 33.Qe8 Kg7 34.Qe7 Kh6 35.Nf7 Kh5 36.Qf6 Qg2 37.Kg2 g5 38.Qh6 1–0. guest488 – guest243, ICC, 2003.

4.e3 b5

5.a3 Bg4 6.Be2 Nc6 7.d3 g6 8.Nbd2 Bg7 9.0–0 0–0 10.c4 e6 11.cb5 ab5 12.d4 Ne4 (12...Na7 13.h3 Bf3 14.Bf3=) 13.Ne4 (13.Bb5 Nd2 14.Qd2 Bf3 15.gf3 Qg5 16.Kh1 Ne7+/–) 13...de4 14.Nd2 (14.Bb5? Bf3 (14...ef3?! 15.Bc6 fg2 16.Qg4 gf1Q 17.Rf1+=) 15.gf3 Qg5 16.Kh1 ef3 17.Qf3 Qb5–+) 14...Be2 15.Qe2 Qd5 16.Rfc1 f5 17.Rc5 Qd6 Black intends f4 18.Qb5 Ne7 19.Qc4 Nd5 Black prepares the advance f4 20.Nb3 f4 21.Rc6 Qe7 22.Qe2 (22.ef4 Nf4 23.Bc1 Nd5+–) 22...f3+= 23.Qc2 (23.Qc4 fg2 24.Qe2+= (24.Kg2?? Qg5 25.Kh1 Rf2–+)) 23...Qh4= 24.Re6?? (24.Qc1 fg2 25.Qe1–/+) 24...Rae8 (better is 24...Qg4 25.Kf1 Qg2 26.Ke1 Qg1 27.Kd2 Qf2 28.Kc1 Qe1 29.Qd1 f2–+) 25.Re8–/+ Re8?? 26.Qd1 Rf8 27.g3 Qh5 28.Qf1?? Nf6?? 29.h4 Qg4 30.Kh2 Nh5 31.Qh3 Nf6 32.Qg4 Ng4 33.Kg1 Rc8 34.Nc5 h6 35.Rc1 g5 36.hg5 hg5 37.Ne4 Kf7 38.Ng5 Kf6 39.Nf3 Kf5 40.Nd2 Bh6 41.Rc5 Ke6 42.d5 Ke7 43.Bd4 Kd7 44.Ne4 Re8 45.Nf6 Nf6 46.Bf6 1–0. Fournier,Frederic (1865) – Ageev,Aleksandr Yuryevich (1865), Active, 2012.

5.a4 Bb7 6.ab5+/– ab5 7.Bb5 c6 8.Ra8 Ba8 9.Be2 Nbd7 10.0–0 e5 (10...Qb8 11.Nc3+/–) 11.Ne5 Bd6 (better is 11...Ne5!? 12.Be5 Bb4+/–) 12.Nd7+– Qd7 13.Bf6 gf6 14.c3 Qe7 (14...Rg8 15.g3+–) 15.Na3 Qe5 Threatening mate: Qxh2 16.f4 Qe4 17.Nc2 c5 (17...Bb7 18.Nd4+–) 18.Rf3 Rg8 (18...Bc6 19.bc5 Bc5 20.Nd4 Bd4 21.ed4+–) 19.Nd4! cd4 (19...Qd4 20.Qa4 Theme: Double Attack) 20.Qa4 A double attack (20.Qa4 Ke7 21.Qa7 Bc7 22.Qc7 Kf8 23.Qc5 Kg7 24.Rg3 Kh8 25.Rg8 Kg8 26.Qc8 Kg7 27.cd4 Qb1 28.Kf2+–) 1–0. Woelfelschneider,Peter – Rodion, 2008.

5.a4 e6!? =.

5.d3 Nbd7 6.Be2 g6 7.0–0 Bg7 8.Nbd2 c5 9.a3 0–0 10.c4 Bb7 (10...dc4 11.dc4 Qb6 12.Qb3=) 11.Rc1 Qc7 (11...Rc8 12.cb5 ab5 13.bc5 Nc5 14.Bf6 Bf6 15.d4+/–) 12.Qb3 (12.cb5!? ab5 13.bc5+/–) 12...dc4 13.dc4 bc4 14.Bc4 (worse is 14.Rc4 Bd5–/+) 14...Ng4 15.Bg7 Kg7 16.h3 Ngf6 17.Rfe1 Rab8 18.e4 Qf4 19.g3 Qc7 20.Ng5 Ne5? (better is 20...cb4 21.ab4 Qd6+/–) 21.Bf7!+– Nf7?? (21...Rf7 22.Ne6) 22.Ne6 Kg8 23.Nc7 cb4 24.ab4 a5 (24...Rfd8 25.Rc2+–) 25.b5 (25.b5 Rfd8 26.Qa2+–) 1–0. Patrinos,Ilias – Dovas,Dimitrios, Epikinonias op 4th, 2000.

4.e3 c6

5.a3 e6 =.

5.c4 dc4 6.Bc4 b5 7.Be2 =.

5.c4 dc4 6.Bc4 Bg4 7.0–0 e6= 8.a3 Bd6 9.h3 Bh5 10.d4 Bg6 11.Nbd2 Nbd7 12.Qb3 0–0 13.Rae1 Nb6= 14.e4 Nc4 15.Qc4 Bc7 16.Nh4 Ne4–+ 17.Ne4 Qh4 18.Nc5 b6 19.Nd7 Rfd8 20.Ne5 Be5 21.Re5 Rd5 22.Qc6= Rad8 23.Rd5+/– ed5 24.Qb6 Be4 25.g3 Qg5 26.Bc1 Qf6 27.Bf4?? Re8 28.Qf6+– gf6 29.Rc1 f5 30.g4 fg4 31.hg4 Bf3 32.Kh2 Re2? 33.Kg3+– Be4 34.Be5 Ra2?? 35.Rc8 1–0. orangutanb4 (2095) – guanako (1760), 2011.

5.c4 Bf5 6.Nc3 (6.c5 b6=) 6...e6 (6...dc4 7.Bc4 e6 8.a3=) 7.a3 Bd6 (7...dc4 8.Bc4 b5 9.Be2=) 8.d4 (8.c5 Bc7=) 8...dc4 9.Bc4 Nbd7 10.0–0 Qc7 (10...Nb6 11.Bb3=) 11.Rc1 (11.Re1 Nb6 12.Bd3 Bd3 13.Qd3 g5+=) 11...Bg4 (11...0–0 12.Re1 Nb6 13.Bd3 Bd3 14.Qd3=) 12.h3+= Bh5 13.Be2 (13.Bd3 0–0+=) 13...Rc8 (13...0–0 14.Qd3=) 14.Ng5 (14.b5 Qa5 15.ba6 ba6+=) 14...Be2= 15.Ne2 (15.Qe2 Rd8=) 15...Qd8 (15...0–0 16.Nc3=) 16.Ng3 (16.Nc3 0–0=) 16...h6 (16...Bg3 17.fg3 0–0 18.Qf3=) 17.N5e4+= Bg3 18.Ng3 0–0 19.e4 (19.Qf3 a5+=) 19...Qb6 20.Qe2 White intends e5 20...Rfd8 21.Rc2 (21.Nh5 Qb5 22.Nf6 Nf6+=) 21...a5 22.ba5 Qa5 23.Rfc1 (23.Rb1 Ra8=) 23...Re8 (23...Qg5 24.Qf3=) 24.e5 (24.Rb1 Ra8+=) 24...Nd5 25.Ne4 Ra8 (better is 25...Red8!?+=) 26.Nd6+/– Rf8 27.Nb7+– Qa7 28.Nd6 Rab8 29.Rc6 N7b6 30.R1c2 Qa4 31.Qg4 Ne7 32.R6c5 Nbd5 33.Bc1 Ng6 34.R5c4 Qa5 35.Qf3 Qe1 36.Kh2 Ne5?! 37.de5 Qe5 38.Bf4 Qf6 39.Qg3 Kh8 40.Nf7! Qf7 41.Bb8 Rb8 42.Qb8 (42.Qb8 Kh7 43.Qe5+–) 1–0. Wall,Bill – Sinn,John, internet, 2003.

4.e3 Nc6

5.a3 Bd7 6.Be2 e5 7.Ne5 Ne5 8.Be5 c6 9.d3 Be6 10.Nd2 Bd6 11.Bd6 Qd6 12.Nf3 h6 13.0–0 0–0 14.h3 b5 15.Nd4 Bd7 16.Rc1 Nh7 17.Bg4 f5 18.Be2 Qg6 19.Bh5 Qg5 20.Be2 f4 21.Nf3+/– Qg6 22.Kh1 fe3 23.fe3 Rae8 24.Nh4 Qg3 25.Rf8 Rf8 26.Qe1 Qe1 27.Re1+= Ng5 28.Nf3 Nf3+= 29.Bf3 Bf5 30.e4 de4 31.Be4 Be4 32.de4 Rf2 33.e5 Rc2= 34.e6 Kf8 35.Kg1 Rc3 36.Rd1 Ke7 37.Rd7 Ke6 38.Rg7 Ra3 39.Rh7 Kd5 40.Rh6 Kc4 41.Rc6= Kb4 42.g4 Rh3–/+ 43.Kg2 Ra3 44.g5 Ra2 45.Kf3 Ra1 46.g6 Rf1 47.Ke2 Rg1 48.Kf2 Rg5 49.Kf3 a5–/+ 50.Kf4 Rg1 51.Kf5 a4 52.Kf6 a3 53.Ra6 Kb3 54.g7 a2 55.Kf7 b4 56.g8Q?? Rg8 57.Kg8 Kb2 58.Kf7 b3 59.Ke6 a1Q 60.Ra1 Ka1 61.Kd5 b2 62.Kc4 b1Q 0–1. Fournier,Frederic (2045) – joseborges01 (1625), Active (5/0), 2004.

5.a3 Bd7 6.Be2 e6 7.0–0 Bd6 8.c4 dc4 9.Bc4 b5 10.Be2 0–0 11.d4 Ne7 12.Ne5 Ng6 13.Bf3 Ra7 14.Nd7 Qd7 15.Qc2 Rc8 16.Rc1 Nd5 17.e4 Nb6 18.e5 Be7 19.Bc6 Qd8 20.Rd1 Nc4 21.Bc3 Nf4 22.a4 ba4 23.Ra4 Nd5 24.Bb5 Nc3 25.Nc3 Nb6 26.Ra6 Ra6 27.Ba6 Ra8 28.Bb7 Ra7 29.Be4 g6 30.Qb3 Nd7 31.d5 f5 32.de6 1–0. Machete99 – CaptinCrunch, ICC, 2002.

5.a3 e5 6.Ne5 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.d4 Ne4 10.Nd2 Nc3 11.Qc1 0–0 12.Nf3 h6 13.Bd3 f5 14.0–0 b5 15.Qd2 Ne4 16.Be4 fe4 17.Ne5 Bf5 18.f4 Rf6 19.c3 Raf8 20.a4 Qb6 21.ab5 ab5 22.Nd7?? Bd7–+ 23.Ra5 h5 24.Rfa1 h4 25.h3 Qb7 26.Ra7 Qc6 27.R1a6 Qc4 28.Ra5 Rg6 29.Kh2 Qf1 30.Ra1 Qc4 31.R1a5 Rg3 32.R5a6 Kh7 33.Rb7 Qf1 34.Rc7 Bh3! 35.Ra2 Bg2 (35...Bg2 36.Qg2 Rg2 37.Rg2 Rg8–+) 0–1. Fournier,Frederic (2005) – Jose42 (1765), Echecs21, 2003.

5.b5 ab5 6.Bb5 Bd7 7.0–0 e6 8.d3 Bc5 9.Nbd2 0–0 10.e4 de4 11.de4 Qe7 12.e5 (12.Qe2 Rfd8=) 12...Nd5 (better is 12...Ne5!? 13.Be2 Nf3 14.Bf3 Ra7–/+) 13.a4 Ra7 (better is 13...Rfd8!?=) 14.Ne4+= Rfa8 (14...Nb8!?+=) 15.Bc6 Bc6 16.Nc5 Qc5 17.Bd4 Qc4 18.Ba7 Ra7 19.Qd4 Qd4 20.Nd4 Ba4 21.c4 Ne7? (better is 21...Nb6 22.Nb5 Ra5+–) 22.Nb5 Ra5 (22...Ra6 23.Nc7 Ra7 24.Rfb1+–) 23.Nc3 (23.Nc7?! h6+–) 23...Re5 24.Ra4 g6 25.Ra7 (25.f4!? Rc5+–) 25...Rc5 26.Rb7 Rc4 27.Nb5 Nd5 28.Na3 Ra4 29.Nc2 c5 30.Ra1 Rc4?! (30...Ra1 31.Na1 c4+–) 31.Ne3 Rd4 (31...Rb4 32.Raa7 Rb7 33.Rb7 Ne3 34.fe3+–) 32.Nd5 (better is 32.Raa7!? Ne3 33.fe3 Rd1 34.Kf2 Rd5+–) 32...ed5 33.Kf1 c4 34.Rc7 Kg7 35.Ke2 (35.Raa7!? Rf4+–) 35...Re4 36.Kf3 Kf6 37.Ra6 Ke5 38.Re7 Kd4 39.Re4 de4 40.Ke2 f5 41.Kd2 f4 42.Re6 e3 (42...g5+–) 43.fe3 fe3 44.Re3 g5 45.g4 Kd5 46.Kc3 Kc5 (46...h6 47.Re8+–) 47.Re4 1–0. Torres Herrero,Fernando – Perez Muelas,Donato, Valladolid San Mateo op, 1987.

5.a3 Bg4

6.Be2 Qd6 7.h3 Bf5 8.g4 =.

6.Be2 e5 7.0–0 Qd6 8.d3 Be7 9.Nbd2 Nd7 white timed out. defesa (2145) – grahamtrue (2165), net–chess.com, 2014.

6.Be2 e6 7.0–0 Bd6 8.h3 Bh5 9.d3 0–0 10.Nbd2 e5 11.c4 b5 (11...Re8!?+=) 12.c5+/– Be7 13.Ne5 Be2 14.Qe2 Ne5 15.Be5 c6 16.Nb3 Nd7 17.Bd4 Bf6 18.Bf6 Qf6 19.Nd4 a5 20.Qf3 Qe7?? (better is 20...Qf3 21.gf3 Ra6+/–) 21.Nc6+– Qg5 22.Na5 (22.Qd5! Qd5 23.Ne7 Kh8 24.Nd5 Rfd8+–) 22...Ra5?! (22...Nc5 23.h4 Qh4 24.Qd5 Na4+–) 23.ba5 Nc5 24.d4 (24.Rab1 Rb8+–) 24...Nb3 (24...Ne4 25.Qe2+–) 25.Rab1 (better is 25.Ra2 Na5 26.Rb1 Rd8+–) 25...Nd2 26.Qe2 Nf1 27.Kf1 Qf6 28.Qb5 h6 29.Qd5 Rd8 30.Qc5 Ra8 31.Rb6 Qd8 32.a6 Rc8 33.Qb4 Rc1 34.Ke2 Rc2 35.Kd3 Rc3 36.Kc3 (36.Kc3 Kh7 37.Qa5 Qc8 38.Kb3+–) 1–0. Hal1958 – Organic, playchess.de, 2006.

6.Be2 e6 7.0–0 Bd6 8.h3 Bh5 9.d3 0–0 10.Nbd2 h6 11.c4 Be7 12.cd5 Nd5 13.Nc4 b5 14.Nce5 Bf3 15.Nc6 (worse is 15.gf3 Ne5 16.Be5 Bf6 17.Bf6 Qf6+= (worse is 17...gf6 18.d4=)) 15...Be2 16.Qe2 Qd6 17.Ne7 Qe7 18.Qg4 f5 19.Qe2 a5 20.ba5 Ra5 21.Rfc1 Rfa8 22.Qc2 Ra4 23.e4 fe4 24.de4 Nf6 25.Qc7 Qc7 26.Rc7 R8a7 (better is 26...b4!? 27.Rc4 ba3 28.Ra4 Ra4 29.Ra3 Ra3 30.Ba3 Ne4=) 27.Ra7+/– Ra7 28.Bf6 gf6 29.f3 Ra4 30.Rb1 Ra3 31.Rb5 Kg7 32.Rb6 e5 33.Rb7 Kg6 34.Rb6 ½–½. mr5reasons1 (1660) – sonata296 (1655), gameknot.com, 2013.

6.Be2 Bf3 7.Bf3 e5 8.0–0 Qd7 9.d3 0–0–0 10.Nd2 h5 11.Qc1 g5 12.c4 g4 13.Be2 Bg7 (better is 13...dc4!? 14.Nc4 Qe6+=) 14.b5+– ab5 15.cb5 Na5 (better is 15...Na7 16.Be5 Nb5+–) 16.Be5 Ne8? (16...Qe7 17.d4 Ne8 18.Bg7 Ng7+–) 17.Bg7 Ng7 18.Qc3 Qb5 19.Qg7 Qd7 20.Qc3 Nc6 21.Rfb1 Rh6 22.d4 h4 23.Qb3 Na5 (23...b6 24.Ba6 Kb8 25.a4+–) 24.Qb5 Qb5 25.Rb5 (worse is 25.Bb5 c6 26.Bd3 Kc7+–) 25...Nc6 26.Bg4 Kb8 27.Bf3 Ne7 28.a4 Rdd6 29.a5 Ka7 30.Rab1 b6 31.ab6 cb6 32.Ra1 Kb7 (32...Kb8 33.Kf1+–) 33.Nc4 1–0. mr5reasons1 (1685) – mikethepawn (1620), gameknot.com, 2013.

6.Be2 Bf3 7.Bf3 e5 8.0–0 Be7 9.c4 e4 10.Be2 0–0 11.cd5 Qd5 12.Nc3 Qd8 13.f3 ef3 14.Rf3 Ne5 15.Rh3 Nd3 16.Bd3 (16.Qc2!? Nb2 17.Qb2=) 16...Qd3+= 17.e4 Qd4 18.Re3 Ne4 19.Ne4 (19.Na4 Qa7 20.Qc2 f5 21.Qc7 Rf7+=) 19...Qb2 20.Nc3 Bf6 (20...Bg5 21.Rd3 Bf6 22.Rb1 Qa3 23.Rb3 Qb3 24.Qb3+–) 21.Ra2 Bc3 22.Rb2 Bb2 23.d4 Rad8 24.Rd3 Rd6 25.Qd2 Re8?? (better is 25...Ba1=) 26.Qb2+– Re1 27.Kf2 Re8 28.Re3 Rf6 29.Ke2 Rd8 30.b5 Rf8 (30...Rg6 31.g3+–) 31.Re7 ab5 (31...Rb6 32.Rc7 Rb5 33.Qc3+–) 32.Rc7 Rb6 33.Qb4 Re6 34.Kd3 Rfe8 35.Qb5 Re3 36.Kc4 Rf8 37.Rb7 (37.a4!? Ra3+–) 37...Ra3 38.Rb8 Ra7 (38...Ra4 39.Kc5 Ra8 40.Ra8 Ra8+–) 39.Rf8 (39.Qe8! h6 40.Qf8 Kh7+–) 39...Kf8 40.Qb8 (40.Qb8 Ke7 41.Qa7 Kd6 42.Qf7+–) 1–0. Dumontelle,Joe – Blake, March, 1979.

6.Be2 Bf3 7.Bf3 e5 8.d3 Bd6 9.Nd2 0–0 (9...a5 10.b5 Ne7 11.c4+=) 10.0–0 e4 11.de4 de4 (11...Ne4 12.c4 Nd2 13.Qd2 dc4+=) 12.Ne4 (better is 12.Bf6 Qf6 13.Ne4+–) 12...Ne4= 13.Be4 Re8?? (better is 13...Bh2 14.Kh2 Qh4 15.Kg1 Qe4=) 14.Bc6 bc6 15.Qg4 f6 16.Rad1 (16.Qc4 Kh8+–) 16...a5 17.c4 Qb8?? (better is 17...ab4 18.ab4 Ra2+–) 18.Bf6 Bf8 19.Bg7! Bg7 20.Rd7 Re7 21.Re7 Qf8 22.Rc7 ab4 23.ab4 Kh8 24.Rg7! Qg7 25.Qg7 Kg7 26.b5 c5 27.Rb1 Kf6 28.g4 Rb8 29.Kg2 Rb6 30.f4 h6 31.h4 White intends g5 31...Rb7 32.Kf3 Re7 33.b6 Rb7 34.e4 White prepares the advance f5 34...Ke6 35.g5 hg5 36.hg5 Kf7 37.Kg4 Kg6 38.f5 Kf7 39.e5 White plans f6 39...Kg7 40.e6 Kf8 41.f6 Kg8 42.Kf5 Kf8 43.g6 Kg8 44.Rh1 Rb6 45.e7 Rf6 46.Ke5 Kg7 47.e8N Kg6+– 48.Nf6 Kf7 49.Rh7 Kg6 50.Ke6 Kg5+– 51.Rh5 Kf4 52.Rc5 Ke3 53.Rc8 Kd4 54.c5 Kc4 55.c6 Kc5 56.Kd7 Kb6 57.Rb8 Ka7 58.c7 Ka6 59.c8Q Ka5 60.Qc7 Ka4 61.Qa7. Fournier,Frederic (1925) – carmenmata (1825), Active, 2002.

6.Be2 Bf3 7.Bf3 e5 8.d3 Be7 (8...Bd6 9.Nd2=) 9.c4 0–0 (better is 9...e4!? 10.cd5 ef3 11.dc6 fg2+/–) 10.cd5+/– Nd5 11.Qb3 Nf6 12.Bc6 bc6 13.Be5 c5 14.bc5 (14.Qc4 cb4 15.ab4+= (15.Qc7? Qc7 16.Bc7 Rfc8–+; 15.Bc7? Qd7–+)) 14...Bc5 (14...Nd7 15.Bd4 Bc5 16.Bb2+/–) 15.Qc3+/– Qe7 (15...Be7!?+/–) 16.Bf6+– gf6 (16...Qf6 17.Qf6 gf6 18.d4+–) 17.Nd2 Qe5? (better is 17...Bd6+–) 1–0. Machete (2320) – capablanka (1710), ICC, 2003.

4.e3 e6

5.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a6 5.Nf3).

4.e3 Bg4

5.Be2 Nc6 6.a3 e6 7.h3 Bh5 8.c4 Ne4 (8...dc4!? 9.Bc4 Bd6=) 9.d3+= Bf3 10.Bf3 Nd6 (10...Ng5!? 11.Bh5 dc4+/–) 11.cd5+– ed5 12.Bd5 Qd7 13.0–0 0–0–0 14.Qf3 f6 15.Bc6 bc6 (15...Qc6 16.Qc6 bc6 17.Rc1+–) 16.Nd2 Kb7 17.Nb3 Nc8 (17...Nf7+–) 18.Na5 Kb6 (18...Ka8 19.Nc6 Na7 20.Nd8 c6 21.Nc6 Qc6+–) 19.Bd4 (19.Bd4 Kb5 20.a4 Kb4 21.Rfb1 Ka5 22.Bc3 Bb4 23.Rb4 Qd3 24.Rb5) 1–0. Fournier,Frederic (2245) – JeanCorinthians, queenalice.com (challenge), 2009.

5.Be2 Nc6 6.a3 Bf3 7.Bf3 e5 8.d3 Bd6 9.Nd2 Qe7 10.c4+= e4 11.cd5 Nb4? 12.Ne4+– Nbd5 13.Nf6 Nf6 14.Bb7 Rb8 15.Bc6 Kf8 16.Qc2 Ng4 17.Rb1 Nh2 18.Bd4 Rb1 19.Qb1 Qd8 20.Qb2 f6 21.f3 Ke7 22.Qb8 0–1. pcmvr – calcar, net–chess.com, 2010.

5.Be2 e6 6.a3 Nc6 7.0–0 Bd6 8.c4 (8.d3 Bf3 9.Bf3 a5+=) 8...dc4 9.Bc4 0–0 10.d4 e5 11.de5 Bf3 12.Qf3 Ne5 13.Qe2 White prepares b5 13...a5 14.b5 Nc4 15.Qc4 c5 16.bc6 bc6 17.h3 Rb8 18.Qc2 Qe7 19.Nd2 Rfc8 20.Rfd1 Rb2 (20...Nd5!?=) 21.Qb2+= Be5 22.Qb6 Ba1 23.Ra1 Qd8 24.Qd8 Rd8 25.Nb3 a4 26.Nc5 Ra8 27.Rc1 Kf8 28.Rc4 Ke7 29.Na4 Kd6 30.Kf1 Ra5 31.Ke2 h5 32.Rd4 Kc7 33.Rc4 (33.Rf4 Nd7+/–) 33...Kd6 (33...Ne8!? 34.Nc3 Nd6=) 34.Kd3 c5 35.g4 (35.Kc2!?+/–) 35...hg4= 36.hg4 g5 37.Kc3 Kd5 38.f3 Nd7 39.Re4 ½–½. Cottarelli,Franco – Wochnik,Manfred, corr, 2000.

5.Be2 e6 6.a3 Nc6 7.Ne5 Ne5 8.Be5 Be2 9.Qe2 Bd6 10.Bd6 Qd6 11.0–0 0–0 12.d3 (12.Nc3 Rfd8+=) 12...d4 (12...a5 13.b5+=) 13.Nd2= b5 14.ed4 Qd4 15.Nf3 Qd6 (15...Qc3 16.Qd2 Qd2 17.Nd2=) 16.g3 h6 17.Rfe1 c5 18.c3 Rad8 19.Rad1 cb4 20.cb4 Rc8 21.Rc1 Nd5 22.Qd2 Rc1 23.Rc1 Ne7 24.Qe3 Rd8 25.Rd1 ½–½. Hasler,Ueli (1710) – Mangold,Wagner (1795), CiF, 2005.

5.Be2 e6 6.a3 Bd6 7.c4 dc4 8.Bc4 e5 (8...0–0 9.h3 Bh5 10.Nc3=) 9.Qb3 (9.h3 Bf5 10.Be5 Nc6+/–) 9...Qe7+= 10.h3 Bh5 11.g4 Bg6 12.Nc3 0–0 13.0–0–0 (better is 13.Nh4!?+=) 13...b5 (13...a5!? 14.h4 ab4 15.ab4 Nc6–/+) 14.Be2+= Nbd7 15.g5 (15.d4!?+=) 15...Ne4–/+ 16.Ne4 Be4 17.d3 Bf5 (better is 17...Bb7!? 18.d4 e4–/+) 18.d4= ed4 (18...Rae8!?=) 19.Nd4+= (19.Bd4? c5 20.Qd5 cd4 21.Qf5 de3–+) 19...Be4 (19...Qg5?? 20.Rhg1 Qf6 21.Nf5+–) 20.f3 Bg6 21.h4 c5?? (better is 21...Rae8+/–) 22.Nc6+– Qe6 (22...Qe8 23.Rd6 cb4 24.ab4+–) 23.Qe6 fe6 24.Rd6 Nb8 25.Nb8 (25.h5 Be8 26.Ne7 Kf7+–) 25...Rfb8 26.h5 Bf7 (26...Be8 27.h6 g6 28.Re6+–) 27.Rd7 cb4 28.ab4 Rc8 29.Kd2 a5 30.g6 Be8 31.Rg7 Kf8 32.gh7 1–0. Schoenegg,Rolf (1945) – Sroubova,Lenka, Karlovy Vary op, 2009.

5.Be2 Bf3 6.Bf3 Nc6 7.a3 e6 8.c4 dc4 9.Nc3 (9.Bc6 bc6 10.Qa4 Qd5=) 9...a5 (9...Ne5 10.0–0 c6 11.Na4–/+) 10.b5 (better is 10.Qa4!? Qd7 11.Bc6 Qc6 12.Qc6 bc6 13.ba5 Ra5 14.f4=) 10...Ne5–/+ 11.Be2 Nd3 12.Bd3 cd3 (12...Qd3 13.Ne2–/+) 13.0–0 Bd6 (13...c6 14.bc6 bc6 15.Rb1–/+) 14.g3 (14.Qf3!?+=) 14...0–0 15.Qb3 c6 (15...Be7!?–/+) 16.bc6 bc6 17.Qc4 c5 18.Qd3 Qe7 19.Qc4 Rfd8 20.Ne4 The isolani on c5 becomes a target 20...Ne4 21.Qe4 e5 22.Rfd1 h5 23.h4 Rac8 24.Kg2 (24.Bc3 Bc7=) 24...c4+= 25.Bc3 Qc7 26.Rdb1 Rf8 27.Rb7 Qc6 28.Qc6+/– Rc6 29.Ba5 Ra6 30.Bb4 Bb4 31.Rb4 Rc8 32.a4 c3 33.dc3+– Rc3 34.Rb5 White prepares a5 34...f6 35.a5 Rcc6 36.Rab1 Kf7 37.Rb6 Rcb6 38.Rb6?? Ra5= 39.Kf3 Kg6 40.Rb4 Kf5 41.Rc4 g5 42.hg5 fg5 43.Rb4 g4 44.Kg2 Rd5?? 45.Rc4 Rd2 46.Rb4 Rd5?? 47.Rc4 Rd7 48.Rb4 Rh7 49.Rc4 h4 50.gh4 Rh4 51.Kf1 Rh3 52.Ke2 Rf3 53.Ke1 Rh3 54.Ke2 g3 55.fg3 Rg3 56.Kd3 e4 57.Re4+/– Kf6 58.Re8 Kf7 59.Ra8 Ke6 60.Ra4 Kd5 61.Rd4 Kc5 62.Rc4 Kd6 63.Rd4 Ke5 0–1. Fournier,Frederic (1645) – castanedo, Active, 2006.

3.Nf3 b5

4.e3 c6 5.a4+= ba4 6.Ra4 e6 7.Be2 Nbd7 8.Bd4 (8.Ne5 Ne5 9.Be5 Nd7=) 8...Qc7 (8...Nb6 9.Bb6 Qb6 10.c3=) 9.0–0 e5 10.Bc3 Bd6 11.h3 Nb6 (11...0–0 12.Qe1+=) 12.Ra1= a6 (12...0–0 13.d4 e4 14.Ne5+=) 13.d4 e4 14.Ne5 0–0 (14...Nbd7 15.Nd7 Qd7 16.Nd2=) 15.Nd2 Ne8 16.f4 f6 17.Ng4 h5 (17...Qe7!?=) 18.Nf2+= g6 19.Qb1 (19.Nb3 Ng7+=) 19...Ng7= 20.Qa2 Increasing the pressure on the isolated pawn on a6 20...Nf5 (20...Kh7 21.Rfb1=) 21.Nd1 (21.Nde4 Ne3 22.Nd6 Nf1 23.Nc8 Ng3+=) 21...Ng3+= 22.Rf2 g5 23.fg5 Ne2 (23...fg5 24.Bf1+=) 24.Re2= fg5 25.Rf2 Bf5 26.Nb3 Bg3 27.Nd2 Bf2–+ 28.Nf2 Qg3 Black intends g4 29.Nf1 Qd6 30.Nd2 Rf7 31.Qa5 Qh6?? 32.Qb6+= g4 33.hg4 Bg4 34.Ng4 hg4–+ 35.Nf1 g3! (35...g3 36.Qc7 Rc7–+) 0–1. Grillon,Jean Marie – Beauvineau,Arnauld, AJEC TH/96/02, 1996.

4.e3 e6 5.Bb5 c6 6.Be2 Bb4 7.0–0 =.

4.Bf6 ef6 5.e3 Be7 6.a3 0–0 (better is 6...Bd7!?=) 7.Bb5+= c6 8.Ba4 Ba6 9.d3 Bd6 10.Nbd2 Bb5 11.Bb5 cb5 12.Nd4 Be5 13.N2b3 Qc7 (13...Re8 14.0–0+/–) 14.Rb1 (better is 14.Nb5!? Qc6 15.N3d4+–) 14...Re8 15.Nb5 Qb7 (better is 15...Qb6!? 16.d4 Qb5 17.de5 fe5+/–) 16.N5d4+– h6 (16...Nc6 17.Nf5 Qc8 18.Qf3 Bc3 19.Ke2+–) 17.0–0 Qd7 18.Nf3 Bd6 19.Nbd4 Qg4 (19...Nc6 20.Nb5+–) 20.h3 Qd7 21.c4 dc4 22.dc4 Qe7 (22...Be5 23.Nb5 Qe7 24.Ne5 fe5 25.Qf3+–) 23.c5 (better is 23.Nf5 Qe6 24.Nd6+–) 23...Bc7 24.Nf5 Qe4 25.Ng3 (25.N3d4 Rd8+–) 25...Qe6?? (better is 25...Bg3 26.fg3 Qe3 27.Kh2 Nc6+–) 26.Nd4 Qe5 27.Qc2 (27.Ndf5 Kf8+–) 27...Nd7 28.Rbd1 h5 (28...Rac8 29.Qf5 Nb8 30.Qg4+–) 29.Ndf5 Nf8 30.a4 g5 (30...g6 31.Nd4 f5+–) 31.Nh6 Kh8 (31...Kg7 32.Ngf5 Kh7 33.Nd6 Kg7 34.Nhf7 Qe6 35.Ne8 Re8+–) 32.Nf7 Kg7 33.Ne5 Be5 34.Nf5 (better is 34.f4!? gf4 35.ef4 Bc7+–) 34...Kf7 35.Rd5 (35.Qc4 Re6 36.f4 gf4 37.ef4 Bc7+–) 35...h4 36.Nd6 (better is 36.Qb3 Kg6 37.f4+–) 36...Ke6 37.Ne8 Kd5 38.Rd1 Ke6 39.Nd6 Ke7 40.Nf5 Kf7 41.c6 Rc8 42.Nd6 Bd6 43.Rd6 Kg7 44.Qf5 Rc7 45.Qf6 Kg8+– 46.Qg5 Rg7 47.Qd8 Rf7 48.c7 Rc7 49.Rg6 Rg7 50.Rg7 Kg7 51.b5 Ne6 52.Qe7 Black resigned 1–0. Uplander – stefanW, ChessWorld.net, 2012.

4.e3 a6

5.a3 Nbd7 6.Be2 e6 7.0–0 Be7 (8.a4 ba4=; 7...Bd6 8.d4=). alaamattar (2150) – nay (2155), net–chess.com, 2005.

5.d4 Nc6 6.Be2 h6 7.0–0 Ne4 8.Nc3 e6 9.a3 f6? 10.Bd3 Bd6? 11.Ne4+– de4 12.Be4 Bb7 13.Bg6 Kf8 14.Bd3 f5 15.c4 bc4 16.Bc4 Qe8 17.Re1 Nd8 18.d5 Qe7 19.de6 Ne6 20.Nh4?? Rh7?? 21.Qh5 Qg5 22.Qg5 Ng5 23.Nf5 Bc8 24.Nd6 cd6 25.Rad1 Be6 26.Be6 Ne6 27.Rd6 Nc7 28.Rd7 Ne6 29.Be5 a5 30.Bd6 Kg8 31.Rd1 Nf8 32.Bf8 Rf8 33.ba5 Ra8 34.Rd8 Rd8 35.Rd8 Kf7 36.a6 g5 37.a7 (37.a7 Rh8 38.Rh8 Ke6 39.a8Q Ke7 40.Qe8 Kd6 41.Rh6 Kd5 42.Qe6 Kc5 43.Qc6#) 1–0. Maly,Guenther (1740) – Korn,Lothar (1700), remoteschach.de, 2009.

3.Nf3 b6

4.e3 e6 5.c4 Bb7 6.cd5 Nd5 (6...Bb4? 7.Qa4 c6 8.Qb4 ed5 9.Qf4+–) 7.a3 a6 8.Nc3 Nd7 9.Nd5 Bd5 10.Qc2 c5 11.b5 a5 12.Be2 Qe7 13.0–0 a4 14.Rac1 Qd6 15.d4 cd4 16.Nd4 Nc5 17.Rfd1 Be4 18.Qc3 Qe5 19.Nc6 Qc3 20.Rc3 (worse is 20.Bc3 Nb3 21.Bb2 Nc1 22.Rc1 Bc5–/+) 20...Be7 21.Rc4 Bd5 22.Rg4 (22.Bg7?! Rg8 23.Rg4 f5=) 22...Bb3 23.Rd2 (worse is 23.Rg7 Bd1 24.Bd1 Nd3=) 23...h5 24.Rg7 Ne4 25.Rd3 Bc2 26.Rf7 Kf7 27.Rd7 Rhe8 28.Bh5 Kf8 29.Be5 1–0. Riepe,Bernhard (2015) – Schulz,Hans Juergen (1980), DESC STS034 email, 2003.

4.e3 Bg4 5.Be2 e5 (better is 5...e6!? 6.a3 Bd6=) 6.Ne5+/– (6.Be5?! Bb4 7.c3 Bd6 8.Qa4 Bd7=) 6...Be2 7.Qe2 (worse is 7.Ke2 Bb4 8.Re1 0–0+=) 7...Nbd7 (7...a6 8.a3+/–) 8.Nd7 Qd7 9.b5 (9.Bf6 gf6 10.a3 0–0–0+/–) 9...Be7 10.Nc3 0–0 11.h3 Ne4 12.0–0 Bb4 (12...Rfd8 13.Ne4 de4 14.Rfd1+/–) 13.Ne4 de4 14.Rfd1 Rad8 15.a4 Rfe8 (15...Bd2? 16.Bc1+–) 16.Ba3 Ba3 17.Ra3 Qd6 18.Raa1 Re5 19.d4 Rf5 20.c4 Qe6 21.a5 ba5 (better is 21...c6!?+/–) 22.Ra5+– Ra8 (22...Rg5 23.Kh1+– (23.Ra7?! Qh3 24.Qf1 Qh6+–)) 23.Rda1 Qf6 (23...Rg5 24.Ra7 Rb8+–) 24.Ra7 Ra7 25.Ra7 Kf8 26.Rc7 Ke8 (26...g6+–) 27.c5 Kd8 (27...Qe6 28.b6 Rd5 29.b7+–) 28.b6 Qe6 29.Qa6 1–0. Yeung,Chun Keung (1660) – Yeung,Ngai, HKG/C13 (HKG), 2011.

4.d4 Bb7

5.e3 Nbd7 6.c4 e6 7.c5 bc5 8.bc5 c6 9.Bd3 Be7 10.0–0 0–0 11.Nbd2 a5 12.Rb1 Ba6 13.Ba6 Ra6 14.Bc3 Qa8 15.Qa4 Rc8 16.Rb3 h6 17.Rfb1 Ne4 18.Ne4+/– de4 19.Nd2 Nf6 20.Rb7 Bd8 21.f3 ef3 22.gf3 Nd5=+ 23.Ne4 Nc3?? 24.Nc3+= Bf6 25.Ne4 Bh4 26.Nd6 Rf8 27.Qc6?? Rc6–+ 28.Kg2 Rd6! 29.cd6 Rd8 30.d7 Kh7 31.Kh3 Be7 32.a4 Bb4 33.Rc7 Qb8 34.Rbc1–+ Qb6 35.R1c6 Qc6! 36.Rc6 Rd7 37.Kg4 Kg6 38.e4 h5 39.Kg3 Rd4 40.h4 Be1 41.Kf4 Ra4 42.Ke3 Bh4 43.f4 Ra3 44.Kd4 Bf2 45.Kc4 h4 46.Rc8 h3 47.Rh8 Rf3 48.f5 ef5 49.ef5 Rf5 50.Rh3 Be1 51.Kd4 Bb4 52.Ke4 Rf1 53.Rg3 Kf6 54.Kd3 g5 55.Ke4 Kg6 56.Rd3 f5 57.Ke5 g4 58.Rd8 Bc3 59.Kd6 Rd1 60.Ke7 Rd8 (60...Rd8 61.Kd8 a4 62.Kd7 a3 63.Ke6 a2 64.Kd5 g3 65.Kc6 g2 66.Kb7 a1Q 67.Kb6 g1Q 68.Kb5 Qd4 69.Kc6 Qa6 70.Kc7 Qdd6; 60...Bf6 61.Ke6 Bd8 62.Ke5 Bc7 63.Ke6 g3 64.Ke7 g2 65.Kf8 Kf6 66.Kg8 g1Q 67.Kf8 Rd8) 0–1. bratek55 (1700) – kombinat293 (1685), kurnik, 2011.

5.e3 e6 6.a3 Nbd7 7.Bd3 Bd6 8.0–0 0–0 9.Nbd2 c5 10.dc5 bc5 11.bc5 Nc5 12.Nd4 Nd3 13.cd3 Ba6 14.N2f3 Rb8?? 15.Qd2?? Qe7?? 16.Rfb1?? Rfc8=+ 17.g3 Nd7 18.Bc1 Nc5 19.Ne1 Be5 20.Rb8 Rb8 21.Qa5? Bd4 22.ed4 Nb3 23.Rb1 Bc8 24.Qa4 Qb7?? 25.Bf4 Bd7–+ 26.Rb3 Ba4 27.Rb7 Rb7 28.Bd6 Rb1 29.Kf1 Bc2 30.Ke2 Bd1 31.Kd2 Bg4 32.f3 Bf5 33.g4 Bg6 34.h4 h5 35.Bc5 Rb3 36.Kc2 Rb7 37.Ng2 hg4 38.fg4 f6 39.Nf4 Kf7 40.h5 Bh7 41.Bb4 a6 42.Kc3 Rc7 43.Kd2 g6 44.h6 e5?? 45.Nd5 Rd7–/+ 46.Nb6 Rb7?? 47.Bc5 ed4 48.Bd4 f5 49.g5+/– Ke6 50.Ke3 Rc7 51.a4 Rc1 0–1. bratek55 (1765) – twojszkun, kurnik, 2011.

4.e3 Bb7

5.c4 Qd7 6.d4 e6 7.a3 Bd6 (7...dc4 8.Bc4 Bd6 9.0–0=) 8.c5+= bc5 9.bc5 Be7 10.Nc3 Nc6?? (10...0–0 11.Rb1+=) 11.Bb5 0–0 12.Ne5 Qe8 13.Qa4 Nd7?? (better is 13...Qb8 14.Rb1 Ne5 15.de5 c6 16.ef6 cb5 17.Nb5 Bc5+/–) 14.Nc6+– f6 (14...Nf6+–) 15.Ne7 Qe7 16.Bd7 Bc8 17.Bc8 Rfc8 18.0–0 c6 19.Ne2 a5 20.Bc3 Qc7 21.Rab1 1–0. Procaccini,L – Tamburini,Mario, Italy op, 1997. (=1.Nf3 d5 2.b4 b6 3.Bb2 Nf6 4.e3 Bb7)

5.c4 e6 6.Qb3 dc4 7.Bc4 Be7 8.Nc3 Bf3 9.gf3 c6 10.Rg1 g6 11.Ne4 0–0 12.h4 Ne4 13.fe4 Bf6 14.e5 Bg7 15.h5+/– b5 16.Be2 a5 17.Rc1 ab4 18.hg6 hg6 19.Rh1 Nd7 20.f4 Nb6 21.Rc6 Nc4?? 22.Bc4+/– bc4 23.Rc4 Qd5 24.Rh2 Qf3 25.Rf2 Qh1= 26.Rf1 Qh4 27.Ke2 Qg4 28.Rf3 Rad8? 29.Bd4 Kh7 30.e4+– Rh8 31.Ke3 Kg8 32.Rb4 Rh1 33.Rb8?? Qg1 34.Ke2?? Qd4–+ 35.Rd8 Qd8 36.Qd3 Rh2 37.Kf1? Qc8 38.Kg1 Rh5 39.Qc3 Qb8 40.Qb3 Qa7 41.Re3 Bf8 42.Kg2 Qc5 43.Qc3 Qb5 44.Qb3 Qc5 45.a4?? Qc1–+ 46.Rh3 Qd2 47.Kh1 Qe1 48.Kh2 Qf2 49.Kh1 (49.Kh1 Bc5 50.Qb8 Kg7 51.Qh8 Rh8 52.Rh8 Qg1). orangutanb4 (1965) – shkaba2010 (1815), kurnik, 2011.

5.d4 e6 6.a3 Bd6 7.c4 Qe7?? 8.c5+– bc5 9.bc5 Bc5 10.dc5 Qc5 11.Bd3 0–0 12.0–0 Nc6 13.Qc2 Qd6? 14.Nbd2 e5 15.Be2 e4 16.Nd4 Rab8 17.Rab1 Na5 18.f4 c5 19.Nf5 Qe6 20.Ng3 c4 21.Be5 Nd7 22.Bb8 Rb8 23.Qa4 Qa6?? 24.Nf5 Bc6 25.Rb8 Nb8 26.Qb4 g6 27.Ne7 Kg7+– 28.f5 Nd7 29.fg6 hg6 30.Qc3 Kf8 31.Ng6 Ke8 32.Ne5 Ke7 33.Rf7 Ke6 34.Rd7! Bd7 35.Bg4 Kd6 36.Bd7 Qb7 37.Bg4 Nb3 38.Nb3 Qb3 39.Qb3 cb3 40.Bd1 b2 41.Bc2 Ke5 42.g4 d4 43.ed4 Kd4 44.Kf2 e3 45.Ke2 a5 46.g5 a4 47.g6 Kc3 48.Bf5 Kb3 49.g7 Ka3 50.Ke3 Kb3 51.g8Q Kc3 52.Qc8 Kb3 53.Qb7 Ka3 54.Qe7 Ka2 55.Be6 Ka1 56.Qa3 Kb1 57.Bf5 Kc1 58.Qc3 Kd1 59.Qd2 1–0. bratek55 (1630) – zeko1 (1680), kurnik, 2011.

5.d4 e6 6.a3 Nbd7 7.Nbd2 Be7 8.c4 c5 9.bc5 bc5 10.cd5 Bd5 11.Bc4 Rb8 12.Rb1 0–0 13.0–0 Ba8 14.Qc2 Qc7 15.Rfc1 Rfc8 16.Ba6 Bb7 17.Bb7 Rb7 18.Qd3 Qb8 19.Bc3 Rb1 20.Rb1 Qc7 21.g3 cd4 22.Bd4=+ Nc5 23.Qb5 Qd7 24.Qd7 Nfd7 25.Rc1 f6 26.Ne4 e5 27.Bc5 Nc5 28.Nfd2 f5 29.Nc5 Rc5 30.Rc5 Bc5 31.a4 Kf7 32.Kf1 Ke6 33.Ke2 e4 34.g4 g6 35.gf5 gf5 36.f3 ef3 37.Nf3 h6 38.Kd3 Kd5 39.Nh4 Ke5 40.Ng6 Kd5 41.Nf4 Ke5 ½–½. Fournier,Frederic (1885) – Tarlo,Maurice (1660), Ch Seine Saint Denis, 2009.

5.Be2 Nbd7 6.0–0 e6 7.a3 Be7 8.Nc3 0–0 9.Re1 a5 10.b5 c5 11.bc6 Bc6 12.Rb1 Rb8 13.Nd4 Ba8 14.d3 Nc5 15.Bf3 Re8 16.Ndb5 Bf8 17.Qe2 Nfd7 18.e4 Ne5 19.ed5 Nf3 20.Qf3 ed5 21.Re8 Qe8 22.Nc7 d4 23.N3d5 Bd5+= 24.Qd5 Qe2 25.Qc4 Rc8 26.Nb5 Re8 27.h4 Qg4 28.Qd4+= Qd4 29.Bd4+/– Na4 30.Be3 h6 31.Kh2 f6 32.g4 g5 33.hg5 hg5 34.Kg3 Kf7 35.c4 Rd8 36.Rd1 Nb2 37.Rd2 Nd3 38.Bb6 Rb8 39.Ba5 Ne5 40.Bc7 Re8? 41.Be5 (41...Re5 42.Kf3+–) 1–0. pereira – hgarjur, internet, 2007.

5.Be2 g6 6.0–0 Bg7 7.d3 0–0 8.Nbd2 c5 9.bc5 bc5 10.Rb1 Nc6?? (Better is 10...Qd7+=) 11.Bf6+– Bf6 12.Rb7 (12...Qd6 13.c4+–) 1–0. Marre – Dziadek_KK, zagraj.pl, 2003.

3.Nf3 c5

4.bc5+= Qa5 5.e3 =.

4.bc5 e6 5.d4 Nc6 6.e3 a5 7.c4 Be7 8.Nbd2 0–0 9.Bd3 dc4 10.Nc4 Nb4 11.Bb1 Qd5?? 12.Qb3 Nd7 13.a3 Nc6 14.0–0 a4 15.Qa2 Bf6 16.Ncd2 Qh5 17.Ne4 e5 18.d5 Na5 19.Bd3 Nb3+/– 20.c6 bc6 21.dc6 Ndc5 22.Nc5 Nc5 23.Be2 Qg6 24.Ne5+– Be5 25.Be5 Bh3 26.Bg3 Bg4 27.Bg4 Qg4 28.Rac1 Ne4?? 29.Bf4 Rfc8 30.f3 Qf5 31.fe4 Qe4 32.Qc2 Qe7 33.c7 Qa3 34.Ra1 Qe7 35.Ra4 g5 36.Ra8 Ra8 37.c8Q (37.c8Q Rc8 38.Qc8 Kg7 39.Qc3 Kg8 40.Rb1+–) 1–0. bratek55 – empori20 (1630), kurnik, 2011.

4.bc5 Nc6

5.d4 Ne4 6.e3 f5 (6...e5!?+=) 7.c4+/– e6 8.cd5 ed5 9.Nc3 Qa5 (9...Be7 10.Qb3 Nc3 11.Qc3+/–) 10.Qb3+– a6 (10...Bd7 11.Rc1+– (11.Qb7 Rb8 12.Qa6 Qa6 13.Ba6 Rb2–/+)) 11.Bd3 (11.Rc1 Nc3 12.Bc3 Qd8+–) 11...Be7 (11...Qb4 12.0–0 Be6 13.Ne2+–) 12.0–0 Nb4 (12...Nc3 13.Bc3 Qd8 14.Rab1+–) 13.Be4 (13.Be2 Nf6+–) 13...fe4 14.Ne5 Be6 (14...Bf6 15.a3 Nc6 16.f4 ef3 17.Nf3+–) 15.a3 Nc6 (15...Nd3 16.Qb7 Rc8 17.Nd3 ed3 18.Nd5 Qd8 19.Ne7 Qe7 20.Qa6 0–0 21.Qd3 Qf7+–) 16.Qb7 0–0 (16...Ne5 17.Qa8 Qd8 18.Qd8 Kd8 19.de5 Kd7+–) 17.Nc6 (17.Nc6 Bd8 18.Na5 Ba5 19.Nd5+–) 1–0. zack1984 (1755) – simson1107 (1770), gameknot.com, 2015.

5.d4 Bg4 6.e3 e6 7.Be2 Be7 8.0–0 0–0 9.Nbd2 Qc7 10.a3 Rfe8 11.c4 h6 12.cd5 ed5 13.h3 Bh5 14.Bc3 Bg6 15.a4 Ne4 16.Ne4 Be4 17.Nd2 Bg6 18.Bf3 Rad8 19.Qb3 Na5 20.Qa2+– Be4 21.Ne4 de4 22.Be4 Bc5 23.Bf3 Bb6 24.Rac1 Nc6? 25.a5! Ba5 26.Ba5?? Qa5+/– 27.Qa5 Na5 28.Ra1 b6+= 29.Rac1 Rc8 30.g4 Rc1 31.Rc1 Rd8 32.Kf1 Kf8 33.Ke2 g6 34.Ra1 Rc8 35.Kd3 Rc7 36.e4 f6 37.d5 Ke7 38.Bd1 Kd6 39.f4 Rc5 40.h4 a6 41.g5 hg5 42.hg5 fg5 43.fg5 Rc8? 44.Kd4 Rf8? 45.e5+– Kd7 46.Bc2 Rf4+= 47.Be4?? Nb3–+ 48.Ke3 Na1?? 49.Kf4+– b5 50.e6 (50.e6 Kd6 51.Bg6+–) 1–0. futsalboy – oflis, kurnik, 2011.

5.e3 Qa5 6.Nc3 +=.

5.e3 e5 6.Ne5+/– Ne5 (6...Bc5 7.Bb5 Qb6 8.Nc3+/–) 7.Be5 Bc5 8.Bb5 Bd7 9.Bd7 (9.Bf6 Qf6 10.Bd7 Kd7+/–) 9...Qd7 (9...Nd7!? 10.Bf4 h5+/–) 10.Bf6+– gf6 11.Nc3 (11.Qf3 Rd8+–) 11...0–0–0 (11...Bb4 12.Ne2+–) 12.Qf3+– d4 (12...f5 13.0–0+–) 13.Ne4 Bb6 (13...Be7 14.ed4 Qd4 15.0–0+–) 14.Nf6 (14.Qf6?! Rhe8 15.f3 de3 16.de3 Kb8+=) 14...Qe6 15.a4 de3 16.fe3 Ba5 (16...Rd6 17.Ne4 Rc6 18.0–0+–) 17.c3 h5 (17...Qd6 18.Ra2+–) 18.Nh5 (18.Rb1 Qc6 19.Rb5 Bc7+–) 18...Rh6 19.Rb1 Rd7 (19...Bb6 20.Rb2 Rdh8 21.Nf4+–) 20.0–0 Bb6 (20...Qa6 21.Rb2 Bc7 22.g3+–) 21.a5 (21.d4 Qd6+–) 21...Ba5 22.Nf6 Rf6 23.Qf6 Rd2 24.Qe6 fe6 25.Rf8 Kc7 26.Rf7 Kc6 27.Rfb7 Bb6 28.Rf7 e5 29.Rf6 Kc5 30.Rf5 Kd6 31.Rf3 e4 32.Rg3 Rd3 33.Kf2 Rd2 34.Ke1 Rd3 35.Rd1 1–0. Wall,Bill – RatherBMating, internet, 2004.

5.Bf6 gf6 6.d4 e5 +=.

3.Nf3 Nc6

4.a3 b5 5.e3 Bg4? (better is 5...a6!?+=) 6.Bb5+– Qd7 7.0–0 a6 8.Ba4 Bf3 (8...e6 9.Ne5 Bd1 10.Nd7 Kd7 11.Rd1+–) 9.Qf3 (9.gf3?! e6+/–) 9...e5 (9...a5 10.c4! ab4 11.ab4+–) 10.d3 (10.Be5 Be7 11.d4 Ne4 12.Bg7 Rg8+–) 10...e4 (10...Bd6+–) 11.de4 Ne4 (11...de4 12.Qf4 Ng8+–) 12.Nd2 (better is 12.c4 Ke7 13.Rd1+–) 12...Nd2–+ 13.Qe2 Nf1 14.Rf1 Be7 15.Rd1 0–0 16.c4 Rae8?? 17.cd5+– Qf5 18.Bc6 Rd8 19.f3 Rd6 20.e4 Qh5 21.Qf2 Rh6 22.h3 Bh4 23.Qe2+– Qg6 24.Bd7 Rd8+/– 25.Bf5 Qg3 26.Bg4 g6? 27.Bc1 g5 28.Be3 Rf8 29.Bf2 Qe5 30.Bh4 Rh4 31.Qa6 Qg3 32.Qe2 h5 33.Bf5 g4 34.fg4 hg4?? 35.Rd3+– Qe5 36.Bg4 f5 37.Bf3 (37.Bf3 fe4 38.Bg4+–) 1–0. Fournier,Frederic (1825) – alfredosanchez, Active, 2007.

4.a3 g6 5.e3 Bg7 6.c4 (6.Be2 Bg4=) 6...dc4 (6...Bg4 7.b5 Na5 8.cd5 Qd5 9.d4=) 7.Bc4 0–0 (7...a6 8.d4=) 8.0–0 (8.d4 Bg4=) 8...Bg4 (8...Qd6 9.b5 Na5 10.Be5=) 9.d4 a5 (9...Qd6 10.Nbd2+=) 10.b5+= Na7 11.Nc3 (11.h3 Bf5+=) 11...c6 12.bc6 Nc6 (12...Rc8 13.h3 Bf3 14.Qf3 (14.gf3?! Rc6 15.Bd3 Qd7=) 14...Rc6 15.Bd3+/–) 13.h3 Bf5 (13...Bf3 14.Qf3 (worse is 14.gf3 e5=) 14...Rc8 15.Rfd1+/–) 14.Rc1 (14.d5 Na7+=) 14...Ne4 (14...Rc8 15.Qb3+=) 15.Ne4 (15.Bd3 Nd6+=) 15...Be4 16.Ng5 (16.Nd2 Bd5+=) 16...Bf5 (16...Bd5 17.Bd5 Qd5 18.Rc5+=) 17.Nf7 (better is 17.e4 Bc8 18.Nf3+/–) 17...Qc7? (better is 17...Rf7 18.Bf7 Kf7 19.Qb3 Be6 20.Qb7 Bd5=) 18.Qb3+– Rf7? (18...Rab8+–) 19.Bf7 Kh8 (19...Kf8 20.Bg8 e6 21.Be6+– (worse is 21.Bh7 Qf7+–)) 20.d5 1–0. Wall,Bill – Guest2612, internet, 2004.

4.b5 Nb4 5.a3 1–0. Wall,Bill – Donmate, Microsoft Gaming Zone, 1998.

4.b5 Ne5?? 5.Ne5+– Qd6 6.d4 g6 7.e3 Ne4 8.Bd3 Qb4+/– 9.c3 Qb2=+ 10.Nf7?? Kf7 11.Qf3?? Bf5 12.g4 (White is in command) 12...Qa1 13.gf5 Nf6 14.fg6 hg6 15.0–0 Qa2 16.Qg3 Rg8 17.Qc7 Bh6 18.Qb7 Be3 19.fe3= Rh8 20.Rf2+= Qa4 21.Bc2+– Qc4 22.e4?? Rab8 23.Qa7+/– Rb5?? 24.Na3 Qa2?? 25.e5+– Qa1 26.Kg2 Rh5 27.Nb5 Rg5+– 28.Kf3 Qh1 29.Ke2 Rf5 30.Bf5 gf5 31.ef6 Qe4 32.Kd2 Qb1 33.Qe7 Kg6 34.Qg7 Kh5 35.Qh7 Kg4 36.h3 Kg3+– 37.Qf5 Qb2 38.Qc2 Qb5 39.Re2 Kh3 40.Qf5 Kg3 41.Re3 Kg2 42.Qf3 Kg1 43.Re1 (43...Qf1 44.Rf1 Kh2 45.Rh1; 43.Qg4 Kf2 44.Rf3) 1–0. gdraper (1715) – jorlinsky, net–chess.com, 2006.

4.c3 e5 5.d4 ed4–/+ 6.cd4 Bb4–+ 7.Nbd2 0–0 8.a3 Bd6 9.g3 Re8 10.Bg2 Bf5 11.0–0 Ne4 12.Nh4 g6 13.Nf5= gf5 14.Ne4 fe4 15.e3 Re7 16.Qb3= Kh8 17.Qb7 Rb8 18.Qc6+/– Rb2 19.Qd5 Qe8 20.Qf5 Qc6 21.d5 Qc4?? 22.Rac1 Qd3?? 23.Rfd1 Qa3 24.Ra1 Qc3? 25.Ra7 c5?? 26.Ra8 Rb8 27.Rda1 Reb7 28.Be4 Kg7? 29.R8a3 Qc4 30.Bd3 Qb4 31.Ra6 Qc3 32.Qh7 Kf8 33.Qh6 Kg8 34.Bh7 Kh8 35.R6a3 Qc4 36.Bd3 Kg8 37.Bc4 Be5 38.Qg5 Kh8 39.Qe5 Kg8 40.Ra8 Ra8 41.Ra8 Kh7 42.Bd3 Kh6 43.Rh8# 1–0. Le(?) – NN (2680), 1991.

4.Ng5 Nb4 5.Nf3 –/+.

4.Ng5 Bg4 5.f3 Bh5 6.g4 Bg6 7.e4 (Better is 7.b5!? Na5 8.Bc3–/+) 7...de4–+ 8.fe4 Nb4 9.Bb5 c6 10.Bc4 Ne4 11.d3?? f6 12.Qf3?? Nc2–+ 13.Kd1 Na1 14.Qe4?? Be4 15.Re1 fg5 16.Re4 b5 17.Be6 Qd3 18.Ke1 Nc2 (19.Kf2 Qe4 20.Bd7 Kd7–+; Better is 18...Qe4!? 19.Kf2 Qc2 20.Kf3 Qb2 21.Bf5–+) 0–1. tallyho950 – kilmer49, Live Game Caissa's Web, 2004.

4.a3 a6

5.e3 e6 6.c4 dc4 7.Bc4 g6 8.0–0 Bg7 9.d4 0–0 10.Qc2 b5 11.Bb3 a5?? (Better is 11...Bd7+=) 12.Qc6+– Bd7 13.Qc5 Ne4 14.Qc2 f5 15.Nc3 Ng5 16.Ne5 Be5 17.de5 a4 18.Ba2 Rc8 19.f4 Nf7 20.Ne2 c5 21.bc5 Bc6 22.Be6 Rc7 23.Ba2 Kg7 (23...Be4 24.Qc3 Qd3 25.e6 Qc3 26.ef7 Rff7 27.Nc3+–) 24.e6 (24…Kh6 25.ef7+–) 1–0. marluc – laserbrain7, Live Game Caissa's Web, 2004.

5.e3 Bf5 6.c4 e6 7.d4 Be7 8.Nbd2 0–0 9.Be2 Rb8 (9...dc4 10.Nc4 Qd5 11.Nce5=) 10.Rc1 Qd7 (10...dc4 11.Nc4 Qd5 12.0–0=) 11.0–0 b6? (better is 11...Rfd8=) 12.cd5+– ed5 (12...Nd5?? 13.e4 b5 14.ef5 ef5 15.Qc2+–) 13.b5 Na7 14.Ne5 Qd6 15.ba6 Ra8 (15...c5 16.f3+–) 16.Ndf3 (16.f3 b5 17.g4 Bc8+–) 16...Ne4 17.Qa4 (17.g4 Bc8 18.Nd2 Nd2 19.Qd2 f6+=) 17...g6 (17...f6 18.Nd3+/–) 18.Nc6 (better is 18.h4+–) 18...Rfe8?? (better is 18...Nc6!? 19.Rc6 Qd8+/–) 19.Ne7 (better is 19.Na7 b5 20.Nb5 Qa6 21.Qa6 Ra6 22.Nc7+–) 19...Qe7 20.Qb3 (20.Ne5 f6 21.Nd3 Rad8+–) 20...Be6 (20...Qd6 21.Rfe1 Nc6 22.Bb5+–) 21.a4 (21.Rc2 c5 22.Qb6 c4+=) 21...Bg4? (better is 21...c5 22.Ba3 c4 23.Be7 cb3+–) 22.Qd5 1–0. Makoveev,Ilya (1805) – Gorlakov,Aleksandr, Batumi GEO, 2014. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Nc6)

4.a3 e5

5.e3 Bg4 6.h3 Bf3 7.Qf3 Qd7 8.d4 ed4 9.ed4 0–0–0 10.Nd2 Re8 11.Kd1 Bd6 12.g4 h5 13.gh5 Nd4 14.Bd4 Nh5 15.h4 a6 16.Bh3 Rd8 17.Bd7 Rd7 18.Qg4 Rh6 19.Nf3 g6 20.Ne5 f5 21.Qg5 Be5 22.Be5 Rdh7 23.Kd2 Kb8 24.Rae1 b5 25.Bd4 Kb7 26.Qg2 Rd7 27.Be5 f4 28.Re2 Ka8 29.Bc7 Rc7 30.Re8 Kb7 31.Qd5 Ka7 32.Qd8 Rch7 33.Qa8 Kb6 34.Qb8 Rb7 35.Re6 1–0. popolus – rusalka, internet, 2001.

5.Ne5 Ne5 6.Be5 Bd6 7.Bd6 Qd6 8.e3 Qe5 (8...0–0 9.Be2+=) 9.d4+/– Qg5 (9...Qd6 10.Bd3+/–) 10.Nd2 Ne4 (10...0–0 11.Nf3 Qh6 12.Bd3+/–) 11.Ne4 (11.Nf3 Qf6+/–) 11...de4 12.h4 (12.Qd2 Be6+/–) 12...Qg4 (12...Qf5 13.h5+/–) 13.Qd2 (13.Qg4!? Bg4 14.h5+/–) 13...0–0+= 14.c4 a6 15.h5 (15.Rd1 Be6+/–) 15...c6 (15...h6!?+=) 16.h6+/– Qg5 (16...g6!?+/–) 17.hg7+– Qg7 18.g3 (18.Qc2 Qg6+–) 18...Be6 (18...Bg4 19.Rh4+–) 19.Bg2 (19.Qc2 f5+–) 19...f5 20.Rc1 (20.c5 Rad8+–) 20...Rf7 21.Ke2 (21.a4 Rd7+–) 21...Rc8 (21...b5 22.cb5 ab5 23.Rc3+/–) 22.Rh4 b5 23.cb5 cb5 24.Rc8 Bc8 25.Qa2 Bb7 26.Qe6 Qf6 27.Qf6+– Rf6 28.f3 ef3 29.Bf3 Bf3 30.Kf3 Kg7 31.Kf4 Re6 32.d5 Re4 33.Kf3 Rh4 34.gh4 Kg6 35.Kf4 Kf6 36.h5 h6 37.d6 Ke6 38.d7! Kd7 39.Kf5 Ke7 40.Kg6 1–0. Wall,Bill – Guest389, internet, 2004.

4.a3 Bf5

5.b5 Na5 6.Nd4 Nc4 7.Bc3 Bd7 =+.

5.b5 Na5 6.Nd4 g6 7.Nf5+/– gf5 8.Bc3 Nc4 9.e3 Bg7 10.Qf3 Ne4?? 11.Bg7+– Ned2 12.Nd2 Nd2 13.Kd2 Rg8 14.Qg3 f6 15.Be2 Kf7 16.Bh5 Ke6 17.Rhd1 Rg7 18.Qg7 d4 19.Bg6 de3 20.Ke3 f4 21.Kf4 Qb8 22.Bh7 c5 23.Ke3 Qe5+– 24.Be4 f5 25.Qe5 Ke5+– 26.Rd5 Ke6 27.Rf5 (27...Rd8 28.Rc5+–) 1–0. pierred – Guest102644, Friendly Game, 5m + 0s, 2003.

5.d3 a5 6.b5 Na7 7.a4 =.

5.d3 Qd6 6.Nbd2 0–0–0 7.Bf6 Qf6=+ 8.e4? de4–+ 9.de4 Be4! 10.Bb5? Bc2 11.Qc1 Nd4 12.Be2? Nf3 13.Nf3 Be4 14.0–0 e6 15.Qc4 Bd5 16.Qc2 h6 17.Rac1 Bd6 18.Qa4 Bf4 19.Rcd1 g5 20.Qa7–/+ b6 21.Bb5 Bb7?? 22.Bd7 Rd7–+ 23.Rd7 Kd7?? 24.Qb7–/+ Bd6 25.Rd1 Rd8 26.Nd4 Ke8–+ 27.Nc6? Bh2! 28.Kh2 Rd1 29.Qc8–/+ Rd8 30.Nd8? Qd8–+ 31.Qd8 Kd8 32.b5 Kd7 33.Kg3 Kd6 34.Kg4 Kc5 35.a4 Kb4 36.Kh5 Ka4 37.Kh6 Kb5 38.Kg5 c5 39.Kf4 c4 40.Ke3 c3 41.Kd3 Kb4 42.Kc2 Kc4 43.g4 b5 44.f4 b4 45.g5 b3 46.Kc1 Kd3 47.Kb1 Kd2 (48.g6 fg6 49.f5 ef5 50.Ka1 f4 51.Kb1 f3 52.Ka1 f2 53.Kb1 f1Q#) 0–1. ramesis – gdraper (1715), net–chess.com, 2006.

5.d3 Qd6 6.Nbd2 e6 =.

5.d3 Qd6 6.e3 a6 =.

4.b5 Na5

5.d3 a6 6.a4 e6 7.Bc3 b6 8.e3 Nb7 9.d4 Nd6 10.Nbd2 Bb7 11.Bd3 Be7 12.Qe2 0–0 (12...Nde4 13.Bb2 ab5 14.ab5 Ra1 15.Ba1=) 13.ba6+= Bc8 14.0–0 Nde4 15.Bb2 Bd6 (15...c5 16.Ne5 Nd2 17.Qd2 Ba6 18.Nc6=) 16.c3 (16.a5 ba5 17.Ra5 c5+=) 16...Re8 (16...c5 17.c4=) 17.Bb5 (17.a5 c5 18.Bb5 Rf8 19.Ne4 Ne4 20.ab6 Qb6+=) 17...Re7 18.Ne1 (18.Ne4 Ne4 19.c4 c5+/–) 18...e5 (better is 18...Nd2!? 19.Qd2 Ba6+=) 19.Ne4+= Ne4 20.Bc6 (better is 20.f3!? Nf6 21.c4 ed4 22.Bd4+=) 20...Ba6+= 21.Bb5 Bb7 22.Bd3 ed4 23.cd4 Re6 24.Ba3? (better is 24.Nf3+=) 24...Bh2 25.Kh1 Rh6 26.Nf3 Bf4 (better is 26...Bg3 27.Kg1 Bf2 28.Rf2 Ng3–+ (28...Nf2?! 29.Qf2 Ra4 30.Ne5–/+)) 27.Kg1–/+ Ng5 (better is 27...Bd6!?–/+) 28.ef4= Nf3 29.Qf3 Qh4 30.Qh3 Qf4 (30...Qh3 31.gh3 Combination) 31.Qe3?? (better is 31.Qg3 Qg3 32.fg3 Ra4 33.Bb2+=) 31…Qh2 0–1. Rcamargo – JohnnyCanuck, playchess.de, 2003. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 Nc6)

5.e3 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 d5 5.Nf3).

4.b5 Nb8

5.e3 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Nf6 5.Nf3).

3.Nf3 Qd6

4.a3 a5 5.Be5 Qb6 6.Nc3 Nbd7 7.Bd4 Qc6 8.e3 b6 (8...Ne4!?+=) 9.Ne5 (9.Ne5 Qe6 10.Nb5+/–) 1–0. Fournier,Frederic (2435) – Jollijapes (2250), Chessworld.net, 2012.

4.a3 c5 5.e3 cb4 6.Be5 Qd8 7.ab4 Nc6 8.c4 Nb4=+ 9.Qa4 Nc6 10.Nc3 Bd7 11.Nb5 Ne5 12.Ne5= e6 13.Nd7 Nd7 14.cd5 ed5 15.Nc3 a6 16.Nd5 Rc8 17.Qe4+/– Be7 18.Ne7 Qe7 19.Qb7+– 0–0 20.Qa6 Qb4 21.Bd3?? Nc5= 22.Qc4 Nd3 23.Qd3+/– Rfd8 24.Qe2 Rc2 25.0–0 Rcd2 26.Qf3 g6 27.Qf6 Qb3 28.Rae1 Qc2 29.h3 R8d6 30.Qf3 Kg7 31.Rc1 Qd3 32.Rc7 Rf6+= 33.Qg3 Qf5 34.Rc4+/– Qb5 35.Rf4 Rc6 36.Qf3?? Qf1–+ 37.Kh2 Rc7 38.Qe4 Qb5 39.f3 Qd5 40.Qb4 Rcc2 41.Rg4 Qf3 (41...Qf3 42.Qd2 Rd2–+) 0–1. Junger – Fillips, Germany, 1987.

4.a3 d4 5.Bd4+/– Ng4 6.e4 Nc6 7.Bc5 Qg6 8.Nc3 e5 9.Bf8+– Kf8 10.h3 Nf6 11.b5 Nd4 12.Ne5 Qh6 13.Qb1 Kg8 14.Bc4 Be6 15.Be6 fe6 16.Nf3 Qg6?? 17.Nd4+– Qg2 18.Rf1 c5 19.bc6 Ne4 20.Qb7 Nc3 21.Qa8 Kf7 22.Qa7 Kg6 23.dc3 Qe4 24.Ne2 Kh6 25.Qd4 Qd4 26.Nd4 Re8 27.a4 g6 28.Kd2 e5 29.Rfe1 Kg7 30.a5 Kf6 31.f4! Kf7 32.fe5 Ke7 33.Rab1 Ra8 34.Rb7 Ke8 35.Rh7 Ra5 36.Rb1 Rd5 37.Rb8 Rd8 38.Rd8 Kd8 39.c7 Kc8 40.Nb5 Kb7 41.Nd6 Kc6 42.c8Q Kd5 43.Re7 g5 44.Qc4# 1–0. Registration (2435) – redshift (2385), ICC, 2003.

4.a3 e6 5.e3 Be7 6.c4 b6 (6...0–0 7.c5 Qd8 8.Be2=) 7.Be2 Bb7 (7...dc4 8.Bc4 Nbd7 9.Nc3=) 8.0–0 (8.cd5 Qd5 9.Nc3 Qd8+=) 8...dc4= 9.Bc4 Ng4 10.g3 (10.Re1 a5=) 10...Qc6 (10...0–0 11.d4=) 11.Be2 (11.Bg7? Rg8 12.Be2 Rg7–+) 11...Bf6 (11...0–0 12.b5 Qd6 13.Qa4=) 12.d4+= 0–0 13.b5 (13.Nbd2 a5+=) 13...Qd6 14.Nbd2 (14.Nfd2 Nh6+=) 14...c5 (14...a6=) 15.Ne5 (better is 15.Ne1 Nh6 16.dc5 Qc5 17.Bf6 gf6 18.Qb3+=) 15...Ne5+= 16.de5 Be5 17.Be5 Qe5 18.Bf3 Bf3 19.Nf3 (19.Qf3 Qd5–/+) 19...Qc7 20.Qc2 h6 21.Rfd1 a6 22.a4 ab5 23.ab5 Nd7 24.Ra8 Ra8 25.Qe4 Ra5 26.Qc6 Ra7 27.Kg2 Kf8 28.Rb1 Nb8 29.Qe4 Kg8 30.Nd2 Qb7 31.Qb7+= Rb7 32.Ra1 Kf8 33.Nc4 Ke7 34.Kf1 Nd7 35.Ra6 e5 36.f3 Ke6 37.Ke2 f5 38.e4 fe4 39.fe4 h5 40.h3 Ke7 41.Kd3 Ke6 42.Na5 Rb8+= 43.Nc4 g6 44.Ra7 Nf6 45.Rc7 Rd8 46.Ke3 Rd4 Attacks the isolani on e4 47.Rc6 Ke7 48.Nb6 Re4 49.Kf3 Rd4 50.Rc5 Rd3 51.Ke2 Rg3 52.Re5 Kd8 53.Nc4 Rh3= 54.b6 Rb3 55.Re6 Nd7 56.Rg6 Nb6 (56...h4 57.Rh6=) ½–½. Liepert,Luise – Blodig,Christine, Bayern–ch (Women), 1982.

4.a3 Bf5 5.e3 c6 6.c4 Nbd7 7.c5 Qc7 8.d4 e6 9.Nc3 Be7 10.Be2 0–0 11.0–0 e5 12.de5 Ne5 13.Ne5 Qe5 14.Na4 Qc7 15.Nc3 Rad8 16.Qd4 Ne8 17.Rfd1 Bf6 18.Qd2 d4 19.ed4 Bd4 20.Qg5 Bg6 21.Bf3 Bf6 22.Qe3 Qc8 23.Rd8 Qd8 24.Rd1 Qc8 25.Bc1 Nc7 26.Ne4 Nd5 27.Nf6 Nf6 28.Bb2 Re8 29.Qf4 Ne4 30.h3 h6 31.Bg4 f5 32.Bf3 Qe6 (32...Ng5!?+=) 33.Be4+/– Qb3 34.Bd5! cd5 35.Qd4 Re7 36.Qd5 Qd5 37.Rd5 Re1 38.Kh2 Re2 39.Bd4 Re7 40.b5 Be8 41.a4 Bd7 42.Rd6 White prepares the advance c6 42...Kf7 43.Kg3 Be6 44.c6 bc6 45.Rc6 Bb3 46.Ra6 g6 47.Ba7 Re4 48.a5 (better is 48.Bc5!? f4 49.Kh2 Ba4+–) 48...Bc4 49.Bb8 Bb5 50.Rb6 Bc4 51.a6 Bd5 52.a7 Ra4 53.Rd6 Ba8 54.Rd7 Ke6 55.Rh7 h5 56.f3 Kf6 57.Rd7 (57.h4!? Bd5+–) 57...h4+/– 58.Kf2 Ra2 59.Kf1 Rc2 60.Bc7 Ra2 (60...Ke6!? 61.Rg7 Rc1 62.Kf2 Rc2 63.Kg1 Rc1 64.Kh2 Rc2+/–) 61.Bd8 Ke6 62.Rg7 Ra1 63.Kf2 Ra2 64.Kg1 Ra1 65.Kh2 Ra2 66.Bh4 (better is 66.Rg6 Kd5 67.Rg7+–) 66...Bf3+/– 67.Rg6 Ke5?? (better is 67...Kf7!? 68.Rf6 Kg7+/–) 68.Rg7 (68.Bf6!? Kf4+–) 68...Be4 69.Be1 f4 70.h4 f3 71.Bf2! fg2? (71...Rf2 72.Re7 Skewer) 72.h5 (72.Re7 Kf5 73.h5+–) 72...Rf2 73.Re7 Kf6 74.Re4 Ra2 75.h6 ½–½. Busele – P1902, playchess.de, 2002.

4.a3 Ng4 5.h3 Qh6 6.e3 e5 7.Ne5+/– Ne5 8.Be5 Nc6 9.Bc7+– Bd6 10.Bd6 Qd6 11.Bd3 Qe5 12.Nc3 d4 13.f4 Qf6 14.Ne4 Qh4 15.g3 Qh6 16.b5 Ne7 17.ed4 0–0 18.Qf3 Nf5 19.c3 Qg6 20.Kf2 Rd8 21.g4 Nh4 22.Qg3 Qh6 23.Ng5 Be6 24.Ne6 fe6 25.g5 Qh5 26.Be2 Qg6 27.Qh4 Rf8 28.Ke3 e5 29.de5 Qe6 30.d4 Rac8 31.Bg4 Rc3 32.Kd2 Qb3 33.Be6! Qe6 34.Kc3 Qb6 35.a4 Rc8 36.Kd3 Qg6 37.Ke3 Rc3 38.Kf2 Rc2 39.Kg1 Qe4 40.Rh2 Qd4 41.Rf2 Qa1 42.Kg2 Rc1 43.Qh5 Rg1 44.Kh2 Rh1 45.Kg3 Qg1 46.Kf3 Qd1 47.Re2 g6?? 48.Qg4= Rf1 49.Ke4 Qa4 50.Ke3 Qb3 51.Ke4 Qb4 52.Ke3 Qc3 53.Ke4 Qc4 54.Ke3 Qc5 55.Ke4 Qb4 56.Ke3 Qa3 57.Ke4 Qb4 ½–½. Registration (2345) – redshift (2400), ICC, 2003.

4.a3 g6 5.Be5 Qd8 6.e3 Bg7 7.c4 c6 8.Nc3 0–0 9.Be2 (9.d4 Nbd7+=) 9...Bg4 (9...dc4 10.Bc4 Bg4 11.h3 Bf3 12.Qf3=) 10.Rc1 (10.cd5 cd5 11.d4 Nc6+=) 10...Nbd7 (10...dc4 11.Bc4 Nbd7 12.Bf6 Nf6 13.h3 Bf3 14.Qf3=) 11.Bg3 (11.Bf6 Nf6 (worse is 11...Bf6 12.cd5 cd5 13.Nd5+=) 12.cd5 Nd5 13.Nd5 Qd5=) 11...e6 (11...dc4 12.Bc4 e5 13.h3 Bf3 14.Qf3=) 12.cd5 cd5 13.d4 a6 14.0–0 Qe7 15.Na4 Ne4 16.Nd2 (16.Bh4 g5 17.Bg3 Ng3 18.fg3 Rfe8+=) 16...Be2 17.Qe2 Ng3 18.fg3 e5 19.de5 (19.Qd3 ed4 20.ed4 Rfe8=) 19...Qe5+= 20.Nf3 Qe6 21.Rfd1 (21.Nc3!?=) 21...Rac8–/+ 22.Nb2 (22.Qd3 Rc1 23.Rc1 Bh6+=) 22...Rc1 23.Rc1 Bb2 24.Qb2 Qe3 25.Kh1 Nb6 26.Re1 Qd3 (26...Nc4 27.Re3 Nb2 28.Re7–/+) 27.Ne5 Qf5 28.Qd4 (28.g4!? Qf4 29.g3–/+) 28...Re8 29.Qb6 Re5 30.Re5 Qe5–+ 31.h3 d4 32.Qb7?? d3 33.Qc8 Kg7 34.Qc1 Qe2 35.Qf4 d2 36.Qd4 f6 (36...f6 37.Kh2 d1Q 38.Qa7 Kh6–+) 0–1. Denney,Cyril – Bird,Steven, IECG, 1998.

4.Ba3 b5 5.e3 a6 6.Be2 e5 7.0–0 Nc6 8.d3 Be7 9.Nbd2 0–0 10.c4 e4 11.c5=+ Qd8 12.Ne1 h6 13.f3 ed3 14.Nd3 Nh7 15.Bb2= Bf6 16.a3 Bb2 17.Nb2 Ne7 18.Qc2 c6 19.Rad1 f5 20.Nd3 Ng5 21.Ne5 Qe8 22.Bd3 a5= 23.e4. pumpkin (2280) – glucchesini, net–chess.com, 2008.

4.Be5 Qb4 5.Bc7 Qc5 =+.

4.Be5 Qb6 =.

4.a3 Nc6

5.b5 Na5 6.e3 Bf5 7.Bd3 Nc4 8.Bd4 Ne4 9.0–0 e5 10.Bc4+= (White is in command) 10...ed4 11.Nd4 dc4 12.Nf5 Qe5 13.Nd4 Bd6 14.f4+/– Qe7 15.Qe2 0–0 16.Qc4 Rae8 17.d3+– Nc5 18.e4 Ne6 19.Ne6 fe6 20.e5 Bc5 21.d4 Bb6 22.Nd2 Qh4 23.g3 Qh3 24.Ne4 h6 25.Nc5 Bc5 26.Qc5 h5 27.Qa7 Rb8 28.Rf3 h4 29.Rc3 Qg4 30.Re1 hg3 31.hg3 Qh3 32.Ree3 c6 33.bc6 bc6 34.Rb3 Ra8 35.Qb6 Ra4 36.Rbd3 Rc8 37.g4 Qh4 38.Qb3 Rca8 39.Qe6 Kf8 40.Rh3 Qe1 41.Kg2 Qe2 42.Kg3 Qe1 43.Kf3 Qf1 44.Ke4 Rd4 45.Kd4 Qf4 46.Kc5 Qf2 47.Kd6 Rd8 48.Kc7 Qa7 49.Kd8 Qb6 50.Kc8 Qa6 51.Kc7 Qa5 52.Kd6 Qd8 53.Qd7 Qd7 54.Kd7 Kf7 55.e6 Kf6 56.e7 Kg5 57.e8Q Kf6 58.Qe7 Kg6 59.Rd6# 1–0. Registration (2355) – redshift (2305), ICC, 2003.

5.b5 Na5 6.e3 Bf5 7.Be5 Qd7 =.

5.b5 Na5 6.e3 Bg4 7.h3 Bf3 8.Qf3 e5 9.Bc3 b6 10.Qf5 Nd7 11.Ba5 ba5 12.Nc3 g6 13.Qf3 Nf6 14.Be2 Bg7 15.e4+= d4 16.Nd5 Nd5+= 17.ed5 f5 18.Qb3 e4 19.Rb1 f4 20.Bg4 0–0 21.Be6 Kh8 22.0–0 f3 23.Rfe1 Be5 24.Re4+/– Bh2 25.Kh1 fg2 26.Kg2 Rf6 27.Qd3 Raf8 28.Qd4 h5 29.Rb3 Kh7 30.c4 Qd8 31.h4 Qd6 32.Qa7 g5 33.hg5 Rg6 34.c5 Rg5 35.Kh3 Qd8 36.Kh2 Rf2 37.Kh3 Rg1 38.Bf5 Rf5 39.Rbe3?? Rfg5?? 40.Re7?? Kh8–+ (41.Re1 Qc8 42.R7e6 Re1–+) 0–1. Registration (2335) – redshift (2415), ICC, 2003.

5.b5 Na5 6.e3 Bg4 7.h3 Bh5 8.g4 =.

5.b5 Na5 6.Be5 Qd8 =.

4.a3 Nbd7

5.d3 e5 6.h3 a5 7.Ng5 (better is 7.b5!?+=) 7...ab4–+ 8.Nf7?? (better is 8.e3–+) 8...Kf7 9.e3 Qc6 10.c4 (10.Qd2 Qb6 11.c3 bc3 12.Nc3 Nc5–+) 10...dc4 11.dc4 ba3 12.Be2 (12.Qb3 Qb6 13.Qb6 Nb6 (worse is 13...cb6 14.Na3 Bb4 15.Ke2–+) 14.Be5 Bb4 15.Bc3 c5–+) 12...Qg2 13.Rf1 (13.Bf3 Qg6 14.Na3–+) 13...ab2 14.Ra8 Bb4 15.Nd2 Qg6 16.Rc8 (16.Bh5 Nh5 17.Ke2–+) 16...b1Q 17.Qb1 Qb1 (17...Rc8?! 18.Qb4 b6 19.Qb5–/+) 18.Bd1 Rc8 (18...Qd3 19.Bh5 Nh5 20.Rf8 Kf8 21.Rh1 Bd2 22.Kd1 Bb4 23.Kc1 Ba3) 19.Ke2–+ Bd2 20.Kf3 Qd3 21.c5 Qf1 0–1. jmcauley (1800) – flyingtiger (2850), net–chess.com, 2013.

5.d4 a5 6.ba5 Qa6 7.Bc3 Ne4 8.Bb4 Qf6 9.Nbd2 e5 10.c4 Nd2 11.Qd2 e4 12.Bf8 (12.Qe3 Bb4 (12...dc4? 13.Qe4 Be7 14.Rc1+–) 13.ab4 Qe7=) 12...Kf8 (12...Nf8 13.Ne5=) 13.Ng5 h6 (worse is 13...dc4 14.Ne4 Qe7 15.Qb4+/–) 14.Nh3 dc4 15.e3 Qa6 16.Nf4 Qa5 17.Bc4 Nf6 18.Qa5 Ra5 19.Kd2 Ke7 20.Rhc1 Rf5 (20...g5 21.Ne2=) 21.Ke1 (21.Bf7 Kf7 22.Rc7 Bd7 23.Rb7 g5+=) 21...Bd7 22.a4 (22.Be2 g5 23.Nh5 Nh5 24.Bh5 Kd6=) 22...b6 23.Ne2 (23.Bb5 Bb5 24.ab5 Kd7+=) 23...Ra8 Attacks the isolani on a4 (23...Ra5 24.Bb3 c5 25.Ng3=) 24.Bb3 Rg5 25.Kf1 Rc8 26.h3 h5 27.Bc2 h4 28.Nc3 Bc6 29.Rab1 Bb7 30.Kg1 Ra5 31.Bd1 Kd7 32.Nb5 The backward pawn on c7 becomes a target 32...g6 33.Bc2 Ne8 34.Bb3 f6 35.g3 hg3 (35...g5 36.Kg2=) 36.fg3 Nd6 37.h4 Nf5 38.Kf2 Ne7 39.g4 Bd5 (39...f5 40.h5 fg4 41.hg6=) 40.Nc3 (40.Bd1 Ba2 41.Rb2 Bf7+=) 40...Bc6 41.Rh1 White prepares the advance h5 41...Rh8 42.Kg3 Rh7 (42...f5 43.Rbf1=) 43.Rbf1 f5 44.h5 gh5 45.Rh5 Rg7 46.Rf4 Kd8 47.Rh8 Be8 48.Nb5 Kd7 49.Nc7 Bf7 50.Bf7 Rf7 51.Na8 Nd5 (51...b5!? 52.ab5 Rb5+=) 52.Rf5+/– Rf5 53.gf5 Ne3 (53...b5 54.ab5 Rb5 55.f6 Nf6 56.Kf4+/–) 54.Kf4 Nf5 (54...Nd5 55.Ke4 Nf6 56.Ke3 Nd5 57.Kd3 Ra4 58.Rh7 Kc6 59.Rh6 Kb5 60.Nb6 Nb6 61.Ke4+/–) 55.Nb6 (worse is 55.Ke4 Nd6 56.Kd3 Kc6+=) 55...Kc7 56.Nc4 (56.Ke4?! Nd6 57.Kf3 Kb6 58.Rb8 Nb7=) 56...Ra4 57.Rh7 Kd8 58.Nb6?? (better is 58.Kf5 Rc4 59.Ke4+–) 58...Rd4= 59.Kf5 e3 60.Rh2 (60.Rh1 e2 61.Re1 Rd2+=) 60...Rd2= 61.Rh3 (61.Rh1 e2 62.Re1 Kc7+=) 61...e2 62.Re3 Kc7 63.Nc4 (63.Na4=) 63...Ra2 (better is 63...Rc2!?=) 64.Ne5+/– Kd6 65.Ng6 Ra5 66.Kg4 Ra4 67.Nf4 Kc5 (67...Ra2 68.Ne2 Ra1 69.Nf4+/–) 68.Re2 ½–½. Stockfish 5 64_bit – Fire 4 64_bit, CCRL, 2014.

5.d4 Nb6 6.e3 Bg4 7.Nc3 c6 8.Be2 Nfd7 (8...Bf3 9.Bf3 a5 10.b5+=) 9.h3 (9.e4 e6=) 9...Bf3 10.gf3 e5 11.e4 de4 12.Ne4 Qe6 13.de5 Ne5 14.Qd4 Nec4 15.Bc4 Qc4 16.Qe5 Qe6 17.Qe6 fe6 18.0–0–0 Nc4 19.Rhe1 h6 20.Ng3 Be7 (20...Nb2!? 21.Kb2 g6+=) 21.Bg7 Bg5 22.Kb1 (22.f4 Bf4 23.Kb1 Na3 24.Kb2 Nc4 25.Kc3 Rh7+–) 22...Rh7+= 23.Bb2 Re7 24.Ne4 Bf4 (24...Nb2 25.Kb2 Rd8 26.Rd8 Kd8 27.Nc5+/–) 25.Ka2 (better is 25.Rd4!? Nb2 26.Nf6 (worse is 26.Kb2 e5 27.Rd6 Rg7+/–) 26...Kf8 27.Rf4+– (27.Kb2?! e5 28.Rd6 e4 29.Nd7 Ke8+=)) 25...Nb2 26.Kb2 Kf7 27.Nc5 Rg8 28.Re4 Bg5 29.Kb3 b6 (29...Bf6!?+/–) 30.Nd7+– Ke8 31.Ne5 c5 32.f4 Bf6 (32...Bh4 33.Nc6 Rd7 34.Re6 Kf7 35.Rd7 Ke6 36.Rh7 Bf2 37.Rh6 Kd7 38.Ne5 Ke8 39.Kc4+–) 33.Nc6 Rc7 34.Re6 Kf7 35.Rdd6 Bg7 36.bc5 bc5 37.Ne5 Be5 38.fe5 (38.Re5?! Rg6 39.Red5 Rd6 40.Rd6 Kg7+–) 38...Rb7 (38...h5 39.Rh6+–) 39.Kc3 Rb1 (39...h5 40.Rh6+–) 40.Rh6 Re8 (40...Rf8 41.Rh7 Kg8 42.Ra7 Rf2 43.Rd8 Rf8 44.Rdd7 Rf3 45.Kc4+–) 41.Rh7 Kg8 42.Ra7 Rf1 43.Rg6 Kh8 44.Rf6 Kg8 45.e6 Re1 46.Rc7 Ra1 47.Kb2 Re1 48.Rg6 Kh8 49.Rc5 Kh7 50.Rg4 Kh6 51.Rc6 Kh5 52.a4 Re2 53.a5 Rf2 54.Rb4 Rf5 55.a6 Ra8 56.e7 Re5 57.Rb7 Re2 58.a7 Kh4 59.Rb8 (59.Rb8 Ra7 60.Rg8+–) 1–0. Huang Qian (2395) – Gu Xiaobing (2255), 2nd Women Masters, 2012. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 Qd6 4.a3 Nbd7)

5.d4 Ne4 6.e3 Ndf6 7.c4 (better is 7.Ne5!?=) 7...Ng4–/+ 8.Qc2 Nef2 9.Rg1 Ne4 10.Bd3 (10.cd5!? f5 11.Ne5 Ne5 12.de5 Qd5 13.Qc7+=) 10...Nef6 11.Ke2 Nh2 12.Nh2 Qh2 13.Nd2 Bg4 14.Kf2 Qh4 15.g3 Qh2 16.Rg2 Qh5 (16...Qh6!? 17.Rgg1 Bh5 18.Nf1–+) 17.cd5–/+ Qd5 (worse is 17...Nd5 18.e4 Nf6 19.Qc7=) 18.Qc7 Rc8 19.Qf4 Bd7 20.Rgg1 Ng4 21.Ke2 g5 (21...Bb5!? 22.Bb5 Qb5 23.Ke1 f5–/+) 22.Qe4 Nf6 23.Qe5 (23.Qd5 Nd5 24.Rac1 h5=) 23...Bg7 24.Rac1 Qe5 25.de5 Ng4 (25...Nd5 26.Bd4 0–0 27.Be4 Bg4 28.Nf3+=) 26.Nf3 (26.e6 Bb2 27.ed7 Kd7 28.Rc8 Rc8 29.Bf5 e6 30.Bg4 Ba3=) 26...0–0 27.Ng5 h6 28.Nf3 Bc6 29.Bf5 Bf3 30.Kf3 Rc1 31.Rc1 Ne5 32.Be5 Be5 33.Rd1 Bd6 34.g4 Kg7 35.Rg1 Kf6 36.Ke2 b6 37.Be4 Rc8 38.Kd2 a5 39.ba5 ba5 40.Rh1 Kg7–/+ 41.Ra1 Rc4 42.Bf3 Ra4 0–1. Berwanger,Florian – Kemeny,Matthias (2010), Karl Mala mem op, 2006.

5.e3 a5 6.b5 Nb6 7.a4 Bg4= 8.Ba3 Qd8 9.Bb2 e6 10.d3 Bb4 11.c3 Bd6 12.Nbd2 0–0 13.Be2 c6 14.bc6 bc6 (Black fights for the initiative) 15.Nd4 Be2 16.Qe2 Qc7 17.g3 Rfb8 18.Bc1 Nfd7 19.Qd1 Nc5 20.Qc2 Nbd7 21.f4 e5 22.Ne2 ef4 23.gf4 Re8 24.Nf3 Rab8 25.Nfd4 Rb6 26.0–0 Bf8 27.Ng3 Reb8 28.Kh1 Nb3 29.Nb3 Rb3 30.Nf5 Kh8 31.Nd4 R3b7 32.Rg1 Nf6 33.Qg2 Ne8 34.Ra2 Rb1 35.Re2 g6 36.e4= Bg7 37.ed5 Bd4–/+ 38.cd4 cd5 39.Ba3 Rg1–+ 40.Qg1 Qc6 41.f5 Ng7 42.fg6 hg6 43.Qg3 Rb1 44.Kg2 Nf5 45.Qg5 Qa4 46.Qf6 Kg8 47.Bc5 Qd7 48.h4?? Ne3!!–+ 49.Re3 Qg4 (50.Rg3 Rb2 51.Qf2 Rf2 52.Kf2 Qh4–+) 0–1. Roelvaag,Mikael – Wibe,Terje Paul (2365), Troll Masters Gausdal, 1988.

5.e3 a5 6.b5 Nb6 7.Be5 Qd8 =.

5.e3 a5 6.b5 e5 7.Nc3 =+.

5.e3 e5 6.Bb5 c6 7.Be2 =+.

5.e3 g6 6.Bb5 Bg7 +=.

5.e3 g6 6.c4 dc4 7.Bc4 Bg7 8.Qb3 (8.d4 0–0+=) 8...e6 (8...0–0 9.d4=) 9.Nc3 (9.d4 0–0+=) 9...c6 (9...Nb6 10.Ne4 Ne4 11.Bg7+=) 10.Ne4 Qe7 11.Nf6 Nf6 12.Bd4 (12.d4 0–0+=) 12...Qd8 (12...b5 13.Be2=) 13.b5 (13.0–0 0–0+=) 13...0–0 (13...Bd7 14.0–0=) 14.bc6 bc6 15.0–0 Nd5 (15...Qd6 16.Be5 Qd8 17.d4+/–) 16.Bg7+/– Kg7 17.Rfc1 Qd6 18.Qd3 (18.Qb2 f6+/–) 18...Rd8 19.Qd4 (19.Bd5 cd5 20.Qd4 f6+=) 19...f6 20.Qh4 (20.Bd5 cd5 21.d3 e5=) 20...e5 (20...g5 21.Qh5 e5 22.d4+/–) 21.d4 Re8 (21...ed4 22.Nd4 c5 23.Nb3+=) 22.de5 (22.e4 Nf4 23.de5 fe5+/–) 22...fe5 23.Ng5 (23.Rab1 Be6+/–) 23...Nf6 (23...h6 24.Qh6! Kh6 25.Nf7 Kg7 26.Nd6+/–) 24.Nf7 Qf8 (better is 24...Qd2!?+/–) 25.Qh6+– Kg8 26.Nd6 (26.Ne5!? Be6 27.Qf8 Kf8 28.Be6 Re6 29.Nc6 h6+–) 26...Kh8 (26...Nd5 27.Qf8 Rf8+–) 27.Nf7 (27.Qf8 Rf8 28.Nf7 Kg7 29.Ne5+–) 27...Kg8 28.Ne5 Kh8?? (28...Be6 29.Qf8 Kf8 30.Be6 Re6 31.Nc6 Ne4+–) 29.Ng6 1–0. Pandurevic,M (2255) – Zovko,M (2125), 10th Metalis Open, 2003.

5.e3 g6 6.Bf6 Nf6 7.d4 Bg7 8.Nbd2 Bg4 9.Be2 Ne4 10.Ne4 de4 11.Nd2 Be2 12.Qe2 f5 13.0–0 0–0 14.g3 c6 15.Nb3 e5 16.c3 ed4 17.cd4 a5 18.Na5 b6 19.Qc4 Kh8 20.Qc6 Qb8 21.Nb3 Rc8 22.Qb5 Rc3 23.Rfb1 Qd6 24.Nd2 Qc7 25.Kg2 Raa3 26.Ra3 Ra3 27.Qe8 1–0. orangutandu – notor64, 2013.

4.a3 Bg4

5.e3 Nbd7 6.c4 c6 7.Be2 g6 8.0–0 Bg7 9.cd5 cd5 10.Nd4 Be2 11.Qe2 a6 12.Nc3 Ne5 13.Rac1 Neg4 14.g3 Ne5?? 15.f4?? Nc4= 16.d3 Nb2 17.Qb2 e5 18.fe5+= Qe5 19.Kh1 Qe3?? 20.Rfe1+– Qe1 21.Re1 Kd7 22.Nf3 Ng4 23.Ne5 Ne5 24.Qe2 Rhe8 25.Nd5 Rad8 26.d4?? Nc6+= 27.Qg4 f5=+ 28.Qd1 Nd4 29.Re8 Re8 30.Nb6 Kc6?? 31.Nc4?? (31...b5 32.Na5 Kb6 33.Qc1=+; 31.Qc1 Kd6 32.Qc5 Ke6 33.Qd5 Ke7 34.Qb7 Kf6 35.Nd5 Kg5 36.Qg7 Re1 37.Kg2 Re2 38.Kf1 Rh2 39.Qd4+–) 1–0. grain – DoubleMint, Live Game Caissa's Web, 2005.

5.e3 Nbd7 6.c4 e5 7.d4 e4 8.h3 =+.

5.Be5 Qc6!? =.

5.Be5 Qe6 6.Bc7+/– Bf3 7.gf3 Nc6 8.e3 Rc8 9.Bf4 Nh5 10.Bg3 g6 11.Be2 Bh6 12.b5 Na5 13.c3 0–0 14.f4 Nf6 15.Bh4 Rfe8 16.d3 Qh3 17.Bf6+/– ef6 18.Bg4 Re3?? 19.fe3+– Qe3 20.Kf1 f5 21.Bf3 Nb3 22.Ra2 Nc1 23.Rd2 g5 24.Bd5 g4 25.Qc1 Re8 26.Bb7 Bf4 27.Qd1 Qh3 28.Bg2 Qh6 29.Re2 Be3 30.Qa4 Re7 31.d4 Qf4 32.Ke1 h6 33.Kd1 Qd6 34.Qc4 Qg6 35.Qd3 Qg5 36.h4 gh3 37.Bh3 Qh5 38.Qf5 Bg5 39.Rhe1 Re2 40.Re2 Qg6 41.Qg6 fg6 42.Re6 Kf7 43.Ra6 Bd8 44.Ra7 Ke8 45.a4 Kf8 46.a5 g5 47.b6 Be7 48.Re7! Ke7 49.b7 h5 50.b8Q Kf7 51.a6 h4 52.a7 Kg7 53.Qe5 Kh6 54.Bf5 g4 55.Qf6 Kh5 56.Qg6# 1–0. Registration (2420) – redshift (2400), ICC, 2003.

3.Nf3 e5

4.a3 Nc6 5.e3 Bg4 6.Be2 e4 7.Nd4 Be2 8.Qe2 Be7 9.d3 a5 10.Nc6 bc6 11.c3 ab4 12.cb4 ed3 13.Qd3 c5 14.bc5 Bc5 15.Bf6 (15...Qf6 16.Qd5 Bb4 17.Ke2=) =. Bourassa,Francois – Kopera,Charles, Q3.1999.0.00053, 1999.

4.e3 e4 5.Nd4 Bb4 6.a3 Bg4 7.Be2 Be2 8.Ne2 Bc5 9.Nec3 Nbd7 10.Nb5 0–0 11.Nd4 Re8 12.Nf5 Rb8 13.Nc3 Re5 14.Nd4 Bd4 15.ed4 Rg5 16.0–0 Qe7 17.Ne2 Re8 18.Ng3 c6 19.d3 e3 20.fe3 Qe3 21.Kh1 Ng4 22.Nf5 Nf2 23.Rf2 Qf2 24.Nd6 Qg2# 0–1. Nautiluschess – rusalka, ICS blitz, 2001.

4.a3 e4

5.Nd4 c5 6.bc5 Bc5 7.e3 Nc6 8.Nb3 Be7 9.Be2 0–0 10.0–0 Qc7 11.f4 ef3 (11...a6 12.a4+=) 12.Bf3= Ne4 13.d3 Nf6 14.N1d2 Ne5 15.Be2? (better is 15.Bd4=) 15...Neg4–+ 16.Bg4 Ng4 (16...Bg4?! 17.Nf3+=) 17.Nf3 (17.Rf4 Ne3 18.Qf3 Bg5–+) 17...Ne3 18.Qe2 Nf1 19.Rf1 Bg4 20.c4 (20.Qe5 Qe5 21.Ne5 Be6–+) 20...Rfe8 21.Qc2 Bf8 22.h3 (22.Nfd4 dc4 23.Qc4 Qc4 24.dc4 Rac8–+) 22...Bh5 (22...Bf3 23.Rf3 Rac8 24.Qf2 dc4 25.dc4 Qc4 26.Rc3–+) 23.Nbd2 Rac8 24.Qc3 (24.Nd4 dc4 25.dc4 Be2 26.Ne2 Re2–+) 24...Qg3 25.Qd4 (25.Rf2–+) 25...Bc5 26.Qc5 Rc5 27.cd5 (27.Bd4 Ra5–+) 27...Rd5 28.Ne4 Qf4 29.Bc1 Qf5 30.Nfg5 Qe5 31.Bf4 Qd4 32.Kh2 Qd3 33.Ng3 Rg5! 34.Bg5 1–0. Fournier,Frederic (1935) – kebori (1615), Active (5/0), 2005.

5.Ne5 Bd6 =+.

4.b5 e4

5.Nd4 Bd6 6.d3 0–0 7.Nd2 Re8 8.de4=+ Ne4 9.Ne4 Re4 10.e3 Bb4 11.c3 Bg4 12.f3 Qh4–/+ 13.g3 Qh6? 14.Be2 Re3 15.cb4+– Bh3 16.Bc1 Bg2 17.Rg1 Bh3 18.Kf2 Re2 19.Qe2 Qd6 20.Qe8 Qf8 21.Qf8 Kf8 22.Bf4 Nd7 23.Rac1 a5 24.Rc7 ab4 25.Bd6 Kg8 26.Ra1 b6 27.Bb4 Ne5 28.Bd6 Nc4 29.Bf4 h6 30.Bc1 Re8 31.a4 Kf8 32.Ba3 Na3 33.Ra3 Re7 34.Re7 Ke7 35.a5 ba5 36.b6 Bc8 37.Ke3 Kd6 38.Ra5 g5 39.Ra7 Bd7 40.b7 Kc7 1–0. SuperForte5 – GrandMasterChess, 1994.

5.Ne5 Bd6 6.e3 Qe7 7.d4 ed3 8.Nd3 Bd7 9.a4 a6 10.Nc1 ab5 11.ab5 Ra1 12.Ba1 c6 13.c4 dc4 14.bc6 Nc6 15.Bc4=+ 0–0 16.0–0 Ra8 17.Bc3 Ne5 18.Bb3 Bf5 19.Nd2 Qc7 20.Bb2 Nd3 21.Bf6= gf6 22.Nf3 Ra1–/+ 23.Nd3 Rd1 24.Rd1 Qc3 25.Nc1 Be5 26.Ne5 fe5–+ 27.Bd5 Bc2 28.Rf1 b5 29.Kh1?! e4 30.Kg1 Qc5 31.Ba2 b4 0–1. pumpkin (2015) – fifteenminutesofgame (2195), net–chess.com, 2003.

4.Be5 Bb4

5.e3 0–0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 0–0 5.Nf3 d5).

5.e3 0–0 6.Be2 Nc6 7.Bb2 Bf5 8.0–0 Re8 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.e3 Nc6 5.Bb2 d5 6.Be2 0–0 7.Nf3 Re8 8.0–0 Bf5).

4.Ne5 Bb4

5.a3 Bd6 =

5.c3 Bd6 6.Qa4 Nbd7 7.f4 0–0 8.Nd7 Bd7 –/+.

5.c3 Bd6 6.d4 0–0 7.c4 dc4 8.Nc4 Re8 9.Nd6 Qd6 10.Nc3 Bg4 11.h3 Bh5 12.Rb1 Nc6 13.Nb5 Qd5 14.Qa4 Qf5 15.Rc1 Qf4 16.Rc4? Ne4–+ 17.Qc2 Qf2 18.Kd1 Ng3 19.Qc3 Nh1 20.Qe1 Qg3 21.Qd2 Nf2 22.Kc2 Bg6 23.Kc1 f6 24.Rc3 Qh2 25.Rf3 Qg1 26.Qe1 Nd3! 27.Rd3 Bd3 28.Nc3 Nd4 29.Qd1 Bc2 30.Qe1 Qe3 31.Qd2 Qf2 32.Nd1 Qf1 33.Qd4 Re2 34.Bc3 Qg2 35.Bd2 Bd1 36.Kd1 Qf1 37.Kc2 Qh3 38.Kc1 Qh1 39.Kb2 Qg2 40.Kc1 Rd2 41.Qd2 Qd2 42.Kd2 0–1. SuperForte5 – GrandMasterChess, 1994.

5.c3 Bd6 6.d4 Nbd7 7.c4 –/+.

5.e3 Nbd7 6.a3 Bd6 7.Nd7 Bd7 8.Qf3 Be7 9.c4 Bc6 10.Qg3 0–0 11.Be5 Rc8 12.Nc3= Re8 13.d4 dc4 14.Bc4 Bd6 15.f4 a6 16.0–0 b5 17.Bd3+= Nh5 18.Qg4 Nf6 19.Qg5 h6= 20.Qg3 Kh8 21.Bf5+= Rb8 22.Rfd1 Qe7 23.e4 Ba8 24.Rd3 Red8 25.Rad1 Ne8 26.d5 a5 27.Ne2 b4 28.ab4+/– ab4 29.Nd4 Rb6 30.Rc1 Bb7 31.Nb3 Be5 32.fe5 Ra8 33.Qf4 Ra2+= 34.Rh3 Ba8 35.d6! (35...cd6 36.Rh6 Kg8 37.Bh7 Kf8 38.Bg6+–) 1–0. Thau,O – Malmstroem,Jan, TSC, 2002.

5.e3 Nbd7=+ 6.Qf3 a6 7.Be2 =.

5.e3 Nbd7=+ 6.Qf3 Qe7 7.Nd7 Bd7 8.Bf6 Qf6 9.Qf6 gf6 10.Nc3 Bc3 11.dc3 0–0–0 12.0–0–0 Be6 13.Rd4 Kd7 14.Bd3 c5 15.Ra4 a6 16.g3 Ke7 17.Kd2 c4 18.Be2 Bd7 19.Ra3 Bb5 20.Rd1 h6 21.Ke1 Ke6 22.Bf3 Ke5 23.Ke2 f5 24.Rd4 Rhe8 25.Rh4 Rd6 26.Rh5 Rf6 27.Rh4 b6 28.Rd4 Rd6 29.Bg2 a5 30.Bh3 Bc6 31.Rf4 Rf6 32.Rd4 Re7 33.Bg2 Rfe6 34.Bh3 Re8 35.Rh4 Rf6 36.Kd2 Re7 37.Rh5 Ke6 38.Rh4 Re8 39.Rd4 Ke5 40.Ke2 Re7 (40...a4 41.Bg2=) ½–½. Blankenberg,Bruno – Munkwitz,Wolfgang , TT–15 ETC, 2005.

5.c4 0–0

6.Qb3 a5 7.cd5 Nd5 8.a3 a4 9.Qf3 f6 10.Nd3 =+.

6.Qb3 a5 7.cd5 Nd5 8.a3 Be7 9.d4 Nb6 10.Qc2 N8d7=+ 11.e3 Ne5 12.de5 Bd7 13.Nc3 Bc6 14.Bd3 Bg2 15.Rg1 Bc6 16.Bh7 Kh8 17.Bf5 Bg5 18.Qe2 Bh6 19.Nb5 Na4 20.Bd4 Qe7 21.Qh5 Bf3? 22.Qf3+– c5 23.Bc2 cd4 24.Nd4 Qe5? 25.Ba4 Rad8 26.Kf1 f5 27.Qh5 (27...Qc5 28.Kg2+–) 1–0. Schulz,Hans_Juergen – Hohlstein,Walter, TT–07 TSC, 2003.

6.Qb3 a5 7.cd5 Nd5 8.e4 =.

6.Qb3 c5 7.cd5 Nd5 8.a3 =.

6.Qb3 Bc5 7.cd5 Nd5 8.Nc3 =+.

6.Qb3 Be7 7.e3 c6 8.cd5 cd5 9.Be2 Nc6 10.0–0 Bd6 11.Nf3 Re8 12.Nc3 a6 13.Rac1 Be6 14.Na4 Rb8 15.Nc5 Bc5 16.Rc5 Ne4 17.Rc2 d4 18.Qa3 de3 19.de3+= Qb6 20.Nd2 Nd2 21.Rd2 Rbd8 22.Rfd1 Rd2 23.Rd2 Qb4 24.Qb4 Nb4 25.a4 Nc6 26.Bc3 Rc8 27.h3 h6 28.a5 Ne7 29.Bd4 Nc6 30.Bb6 Ne5 31.Rd8 Rd8 32.Bd8 Kf8 33.Bc7 f6 34.f4 Nc6 35.Bf3 Ke7 36.Kf2 Kd7 37.Bb6 Kd6 38.h4 g5 39.hg5 hg5 40.g3 gf4 41.gf4+/– f5 42.e4 fe4 43.Be4 Bd5 44.Bc2 Ne7 45.f5 Nc6 46.Kg3 (46.Ke3 Ne5+=) ½–½. Guenschmann,Martin – Ryska,Jiri, CiF, 2003.

6.Qb3 Be7 7.e3 (7...Nc6 8.Nc6 bc6 9.Be2=). pcmvr – Fabbri (1710), internet, 2005.

6.cd5 Qd5 7.Qb3 Qb3 8.ab3 Be6 =+.

6.cd5 Qd5 7.Nd3 Be7 8.Nc3 Qd6 9.e3 Nc6 10.Nb5 Qd8 11.Be2 Bf5 12.Nf4 (12.Ne5 Ne5 13.Be5 c6+=) 12...a6 13.Nc3 (13.Nd4 Nd4 14.Bd4 c5+=) 13...Bd6–/+ 14.g4 Bg4 (better is 14...Bc8–/+) 15.Bg4+= Bf4 16.ef4 Re8 17.Be2 Nh5 18.0–0 Nf4 19.Bf3 Ne5 20.d4 (worse is 20.Bb7 Rb8 21.Ne4 Rb7 22.Be5 Re5–+) 20...Ned3 21.Bc1 Nh3 22.Kg2 Qd4 f2 becomes the focus of attention 23.Kh3 Qc3 24.Be3 Rad8 25.Kg2 (better is 25.Qb3!? Qb3 26.ab3=) 25...Nf2–/+ 26.Bf2 (26.Qc1 Qe3 27.Qe3 Re3 28.Kf2+=) 26...Rd1–+ 27.Rad1 b5 28.Bd5 (28.Rd7 Qc4–+) 28...Qc2 29.Kh1 Re5 30.Rc1 Qd3 31.Bg2 (31.Rcd1 Qg6 32.Rde1 Re1 33.Re1 h5–/+) 31...Re2–+ 32.Rc7 h5 33.Rc8 (33.a3 Qa3 34.Rf7 Qa2–/+) 33...Kh7 34.Rc5 Ra2 35.Re5 (35.Rh5 Kg8 36.Re5 Re2 37.Re2 Qe2–+) 35...Re2 (35...g6 36.Re7 Kg8 37.Bh4–+) 36.Rh5 Kg8 37.Rd5 Qc2 38.Rc5 Qd2 (38...Rf2?! 39.Rc2 Rc2 40.Bb7=) 39.Rd5 Qa2 (39...Rf2?! 40.Rd2 Rd2 41.Ra1+=) 40.Kg1 Rd2 41.Re5 f6 42.Rc5 Qe6 (better is 42...Qa4!?–+) 43.Rc6–/+ Rd6 44.Bh3 (44.Rd6!? Qd6 45.Ra1–/+) 44...Qe5–+ (44...Qh3?! 45.Rd6 a5 46.Bg3=) 45.Rc5 Rd5 (better is 45...Qe2!?–+) 46.Rc6–/+ Qg5 47.Bg2 (47.Kh1 a5 48.Ra6 a4 49.Be6 Kh7–/+) 47...b4 (47...a5 48.Rc3 Re5 49.Bd4–+) 48.Bh4 (48.Ra6!? Rd2 49.Rb6+=) 48...Qg6–/+ 49.Bg3 (49.Ra6 b3–/+) 49...Rd8 (49...Ra5–/+) 50.Bh3? (50.Ra6!? b3 51.Rb6–/+) 50...Qd3 (50...a5 51.Bf5 Qe8 52.Be6 Kh8 53.Rb6–+) 51.Be6 Kh8 52.Re1 a5 (better is 52...Qb5!? 53.Rc7 a5–+) 53.Rc5+= g6 54.Ra5 Qf3 55.Bh3 Rd1 56.Rd1 (56.Ra8 Kg7 57.Rae8 Re1 58.Re1 b3–/+) 56...Qd1 57.Bf1 b3 58.Rb5 Qc2 59.Bf2? (59.Rb8 Kg7 60.Rb7 Kh6 61.Rc7–+) 59...b2–+ 60.Bd4 (60.Rb8 Kg7 61.Bd3 Qd1 62.Kg2 Qd3 63.Rb7 Kh6 64.Rb2 Qd5 65.Kf1 Qc4 66.Re2 f5 67.Be3 f4–+) 60...b1Q 61.Bf6 Kg8 62.Rb1 Qb1 63.Bh4 Kf7 64.Bg3 g5 65.Kg2 Qc2 66.Kg1 Kg6 67.h3 g4! 68.hg4 Kg5 (68...Qd1!? 69.Kf2 Qg4 70.Bd3 Kf6 71.Bf1–+) 69.Bh3 Qb2 0–1. Cirulis,Ilmars (1905) – Alban,Alexis (2190), FICGS, 2015.

6.cd5 Qd5 7.Nd3 Be7 8.Nc3 Qd8 9.e4 =+.

6.cd5 Qd5 7.Nd3 Be7 8.Nc3 Qf5 9.Rc1 (9.h3 Rd8=+) 9...Be6 10.g3 Bd6 11.Bg2 c6 12.Qa4 Nbd7 (12...Re8 13.Ne4 Ne4 14.Be4=+) 13.e4 (13.Ne4 Ne4 14.Be4 Qg4=) 13...Qh5 (13...Qg6 14.Qd4 Bc7 15.Qb4=+) 14.Ne2 Rfe8 15.Ndf4 Qh6 16.d3 (16.Qc2 Bg4 17.f3 Bh5=) 16...Ng4 (16...Nb6 17.Qa5 Bg4 18.h3 Be2 19.Ne2=) 17.h3 Nge5 18.Qc2 (18.0–0 Nb6 19.Qa5 Bd7 20.Be5 Re5=+) 18...Bb4 19.Kf1 Ng6 (19...Ba5 20.d4 Nc4 A) 21.Ne6?! Nd2 22.Kg1 Qe6= (< 22...fe6 23.Rd1+/–; < 22...Re6 23.Rd1+/–); B) 21.d5+–) 20.Ne6 fe6 21.Qb3 (21.Rb1 Bd2+=) 21...a5 (21...c5 22.d4=) 22.d4 (22.a3 Bd2 23.Rc2 Ra7+=). Benassi,Aspasio (2065) – Geus,Jan (1750), IECG, 1998.

6.Qb3 Bd6

7.cd5 Re8

8.Nd3 Nbd7 9.g3 Nb6 10.Bg2 Bf5 11.Bf3 Bh3 12.Nc3 g5 13.Rg1 a5 14.Na4 g4 15.Bh1 Qe7 16.e3 Ra6 17.Rc1 Nh5 18.Nac5 Ra7+/– 19.Ne4 Nd7 20.Qb5 b6 21.Nf4 Nf4 22.gf4 Kf8 23.Ng5 f6 24.Nh3 gh3 25.Qd3 Bf4 26.d6! cd6 27.Bd5 (27.Bd5 Qg7 28.Rg7 Kg7 29.Qf5+–) 1–0. Raap,Christian (2285) – Grimm,Wolfgang (1975), remoteschach.de, 2010.

8.d4 Nbd7 9.f4 Nd5 10.Nf7 (10.Qd5? Ne5 11.e4 Ng4–+) 10...Kf7 11.Qd5 Kf8 12.Nc3 +=.

8.d4 Be5 9.de5 Nd5 10.e4 Nb6 11.Nd2 Be6 12.Qg3 (12.Qe3!?=) 12...Na4+= 13.Bc3 a6 14.a3 Nc6 15.f4 Rc8 (15...h5 16.Kf2+=) 16.Rb1 (16.Kf2 Qe7 17.Qe3 Rcd8=) 16...b5+= 17.Ba1 Nd4 18.Rc1 c5 19.f5 Ba2 20.f6 Ne6 (20...g6 21.Qg5 Ne6 22.Qe3+=) 21.Rc2 (21.fg7 c4+=) 21...c4 22.Be2 0–1. Friedrich,Franz (2160) – Kleinsorgen,Horst (2095), remoteschach.de, 2006.

8.Nf3 Nbd7 9.Nc3 =.

8.Nf3 Na6

9.Nc3 Bf5 10.Qb7?? Nc5 11.Qc6 Nd3 12.Kd1 Nb2 13.Kc1 Ba3 14.Nd4 Nd3 15.Kd1 Nf2 16.Ke1 –+.

9.Nc3 Bf5 10.Qb7?? Nc5 11.Qc6 Nd3 12.Kd1 Nf2 13.Ke1 Nh1 –+.

9.Nc3 Bf5 10.e3 Nc5 11.Qc4 a6 12.a4 Nfd7 13.Ra2 Bc2 14.Qd4 b6 15.Qg4 Nf6 16.Qd4 Nfd7 17.Qg4 f5 18.Qh3 Nd3 19.Bd3 Bd3 20.Ra1 Ne5 21.Ba3 b5 22.Bd6 Nf3 23.Qf3 Qd6 24.Ne2 b4 25.Nf4 Bc2 26.0–0 b3 27.Rfb1 Qb4 28.Rb2 Qd2 29.d6 (29.Rab1 Re4–/+) 29...cd6 30.h3 (better is 30.Ne2!?–/+) 30...Qc3–+ 31.Qd5 Kh8 32.Qd4 Qd4 33.ed4 Rab8 34.Nd5 Be4 35.Nc3 Bd3 36.Rd1 Bc2 37.Rc1 Kg8 (37...Rb4!? 38.Nd5 Rd4 39.Ne3–+) 38.Nd5 Re2 39.a5 g5 40.Nc3 Rd2 0–1. Riepe,Bernhard – Glotz,Dietmar, DESC M2006 Gr04 email, 2006.

9.Nc3 Bf5 10.e3 Nc5 11.Qc4 a6 12.d3 Rc8 13.Qd4 c6 14.Rd1 Qa5 15.dc6 Rc6 16.Nd2 Ne6 17.Qa4 Qc7 18.Rc1 Nf4 19.Qc2 Bc5 20.Nb3 Be3–/+ 21.fe3 Re3 22.Kd2 Nd3 23.Bd3 Qf4 24.Bf5 Rd6 25.Nd5 0–1. Meier,Franz – Bonetti,Shane (1990), TT–13 ETC, 2004.

9.e3 Nc5 10.Qc4 a6 11.Bd4 b5 12.Qc2 Qe7 13.Nc3 b4 14.Ne2 Nd5 15.Ng3 Nf4 16.Rc1 Nb7 17.h4 c5 18.Ba1 h6 19.Nf5 Bf5 20.Qf5 Na5 21.h5 Qe6 22.Qe6 Ne6 23.Rh4 Be7 24.Re4 Reb8 25.Be2 Rd8 26.Bb2 Rd6 27.Rc2 Rd5 28.g4 1–0. Woelfelschneider,Peter – Hohlstein,Walter, TT–07.11, 2003.

5.e3 0–0

6.Nc3 Qe7 7.Nf3 c5 8.Be2 Nc6 9.0–0 Rd8 10.a3 Ba5 11.d4 Ne4 12.Ne4 de4 13.Ne1 cd4 14.ed4 Qd6 15.c3 Ne7 16.Nc2 Bc7–/+ 17.g3 Bh3 18.Re1 Be6 19.Bf1 f5 20.c4=+ Ba5 21.Re3 Rac8 22.d5 Bb6 23.Re1 Bf7 24.Nd4 a6 25.Rc1 Bc5 26.a4 Rc7 27.Rb1 Bb4 28.Re3 Bc5 29.Re1 Bb4 30.Re3= ½–½. Hlousek – Preuss, corr 3GMM–34, 1996.

6.Nc3 Qe7 7.Nf3 Re8 8.Rb1 =+.

6.Nc3 Re8 7.f4 =+.

6.Bd3 Bd6 7.0–0 c5 8.c4 Re8 9.f4 d4 10.Na3 Be5 11.fe5 Re5 12.ed4 cd4 13.Nb5 Bg4 14.Qb3 Nc6 15.Rf4 Increasing the pressure on the isolated pawn on d4 15...Be2 (15...g5 16.Rf2 a6 17.Nc7 Qc7 18.Rf6+=) 16.Be2= (16.Bd4? Rb5 17.Qb5 Nd4–+ (17...Bd3?! 18.Bf6 gf6 19.Qb7–/+)) 16...Re2 17.Qd3 The pressure on the isolated pawn grows 17...Re5 18.Nd4 (18.Bd4? Nh5 19.Qf1 Rb5 20.cb5 Nd4 21.Rf7 Qb6–+) 18...Nh5 19.Rf2 Qd7 20.Raf1 f6 21.Rf3 Nd4 22.Bd4 Rg5 23.Qc3 Re8 24.Be3 Rg4 25.Qb3 Qf7 (25...b6!?+=) 26.h3+/– Rg3 27.Ba7 Qg6 28.R1f2 Re1 29.Kh2 Rf3 30.Qf3 (better is 30.Rf3!? Qf7 31.Bb8+/–) 30...Ng3= 31.Qd5 (worse is 31.Qg3 Rh1 32.Kh1 Qg3–/+) 31...Kf8 32.Qd6 Kf7 33.Qc7 (worse is 33.Qg3 Rh1 34.Kh1 Qg3–/+) 33...Kg8 34.Qb8 (worse is 34.Qg3 Rh1 35.Kh1 Qg3–/+) 34...Kf7 35.Qb7 (worse is 35.Qg3 Rh1 36.Kh1 Qg3–/+) 35...Kg8 36.Qd5 Kf8 37.Bc5 Ke8 38.Qc6 Kd8 39.Bb6 Ke7 40.Qb7 Ke6 41.Rf6 ½–½. Winiger,Albert (2340) – Kleefisch,Thorsten (2065), RSS7E pro–69, 2007.

6.Be2 Bd6 7.d4 Re8 8.Nf3 a6 9.0–0 b5 10.a4 b4 11.c3 bc3 (11...Nc6 12.Nbd2+=) 12.Nc3 Nc6 13.Ba3 Rb8 14.a5 Ba3 15.Ra3 Qd6 16.Qc1 h6 17.h3 Kh8 18.Ra2 Nb4 19.Rb2 Bf5 20.Na4 Ne4 21.Nd2 Qd7 22.Qd1 Ng5 23.Nc5 Attacks the isolani on a6 23...Qd6 24.h4 (24.Qa4!? Nh3 25.Kh1+/–) 24...Ne6= 25.Ndb3 Nc5 26.Nc5 Nc6 27.Rb8 Rb8 28.Qd2 Nb4 29.Ra1 Qf6 30.Qc3 Bc8 31.Bf1 Qg6 32.h5! Qf5 (32...Qh5 33.Nd3 Combination) 33.Nd3 (33.Nd3 c5 34.Nc5+–) 1–0. Buczinski,Henryk (2195) – Janosi,Ervin (2035), RA–2011–O–00171, 2011.

6.Be2 Re8 7.0–0 =+.

6.Be2 Re8 7.Nd3 Bd6 8.Nc3 Be6 9.Nb5 Be7 10.Be5 Na6 11.Nf4 Bd7 12.Nc3 c6 13.Ba6 ba6 14.h3 Bc5 15.Nd3 Bb6 16.0–0 Bf5 17.Bh2 Bd3 18.cd3 Bc7 (18...Qe7 19.d4=) 19.Bc7+= Qc7 20.Qa4 Nd7 21.d4 Qc8 22.Rfc1 Nb6 23.Qc2 Re6 24.a4 a5 25.Ne2 g5 26.Ng3 Qd7 27.Qf5 h6 28.Nh5 Qe7 29.Rc5 Nd7 30.Ra5 (30.Rc3 Rb8+/–) 30...a6?? (better is 30...Qd8 31.Rc5 Nc5 32.dc5 Rb8=) 31.Qd3+– c5 32.dc5 Nc5?? (better is 32...Ne5 33.Qc3 f6+–) 33.Qc3 (33.Qd4 Re5 34.Rc5 Rd8+–) 33...Rg6 (33...d4 34.Qc5 Qc5 35.Rc5+–) 34.Rc5 d4 35.Qd4 Rd8 36.Qc3 Kh7 37.Rc7 Rd7 (37...Qe6 38.f4 Rb8 39.Rf1+–) 38.Rd7 Qd7 39.Nf6 Rf6 40.Qf6 Qa7 (40...Qe6 41.Qe6 fe6 42.Rb1+–) 41.Rc1 Qb7 42.Rc6 Qb1 43.Kh2 Qb8 44.f4 gf4 45.Qf7 1–0. Jaskulski,Klaus – Stiewe,Frank, Berlin Unicorn op, 2004. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 e5 4.Ne5 Bb4 5.e3 0–0)

6.Be2 Re8 7.h4 c5 (7...Bd6 8.Nf3–/+) 8.Nd3+= Nc6 (8...Na6!?+=) 9.a3+= Ba5 10.Nc5 d4 11.ed4 (11.Nb3!? de3 12.fe3=) 11...Nd4+= 12.Bd4 Qd4 13.Nb3 Qe5 14.Kf1 Ne4 15.d4 Qf6 16.Bf3 Bb6 17.c4 Bg4 18.c5 Bc7 19.Ra2 h5 (19...Qf5 20.Nc1+= (20.Bg4? Ng3 21.Kg1 Qg4–+)) 20.Rc2 (20.d5 Bf3 21.gf3 Qa6 22.Kg2 Qg6 23.Kf1 Qa6 24.Kg2 Qg6 25.Kf1 Qa6=) 20...Qa6 (20...Rad8 21.N1d2+=) 21.Kg1 (21.Be2!?=) 21...Bf3–/+ 22.Qf3?? (better is 22.gf3 Nf6 23.Qf1–/+) 22…Nd2!!–+ (22...Nd2 23.Qd1 Nb3–+) 0–1. Jaskulski,Klaus – Ulziibat,Bat Ochir, Berlin Unicorn op, 2004. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 e5 4.Ne5 Bb4 5.e3 0–0)

6.Be2 Bf5 7.0–0 Nbd7 8.f4 Qe7 9.g4 Be4 10.g5 Ne5 11.gf6+= Qf6 12.Be5 Qg6 13.Kf2 Qg2 14.Ke1+– Qh2 15.Bf3 Qg3 16.Ke2 Bf3 17.Rf3+/– Qg2 18.Ke1 Qg1= 19.Ke2 Qg2 20.Ke1 Qg1= 21.Ke2 Qg2 ½–½. MChess – Fritz3, computer chess match, 1995.

6.Be2 Bf5 7.a3 Bd6 =.

6.Qf3 Re8 =.

6.Be2 Nbd7

7.0–0 =.

7.Nd3 Bd6 =+.

7.Nd7 Bd7 8.0–0 Bd6 9.a4 c6 10.c4 dc4 11.Na3 b5 12.d3 Qc7 (12...Qe7 13.Bf6 Qf6 14.ab5 cd3 15.Qd3–/+) 13.Bf6 gf6 (13...Bh2 14.Kh1 gf6 15.g3+/– (worse is 15.dc4 Be5+=)) 14.ab5 cb5 15.dc4 Bh2 16.Kh1 Be5 17.Ra2 bc4 18.f4 Bd6 19.Rd2 (19.Nc4 Be6 20.Rc2 Bc5+=) 19...Ba3 20.Rd7 Qc5 21.Rf3 Rab8 (21...Rac8 22.Rg3 Kh8 23.Rh3=) 22.Rh3= Qf5 23.Kh2 (23.Bc4?? Rb1 24.Qb1 Qb1 25.Kh2 Qb6–+) 23...Rb1 24.Qa4 Bc5? (24...Ra1!?+=) 25.Bc4 (25.Rh5 Qe6 26.Rc5 Qe3 27.Qc4 Qf2+–) 25...Rb4 (25...Rc1 26.Rf7! Rc4 27.Rf8 Kf8 28.Qc4+–) 26.Bf7!+– Kh8 27.Qd1 Be3 28.Re3 Qf4 29.Rg3 Re4 30.Be6! Threatening mate... how? 30...Qh6 31.Rh3 The mate threat is Rxh6 31...Rh4 32.Qd6 Threatening mate: Rd8 32...Rh3 33.gh3 Re8 34.Rd8 Qg6 35.Bf5! Rd8 36.Qd8 Qg8 37.Qf6 Qg7 38.Qd8 Qg8 39.Qg8 Kg8 40.Kg3 a5 41.Kg4 a4 42.Bb1 ½–½. Woelfelschneider,Peter – Winkelmann, 2009.

7.Nf3 Nb6 8.0–0 =+.

7.Nf3 Qe7 8.0–0 Nb6 9.a4 a5 10.d3 Bd7 Exerts pressure on the isolated pawn 11.c3 Bd6 12.Nbd2 c5 13.Qc2 (13.Qb3 Bc7+=) 13...Rfe8 14.Rfe1 Bc7 15.c4 Rac8 16.Qb3 dc4 17.Nc4 Be6 18.Nfd2 Nc4 19.Nc4 Nd5 20.Bf3 Nb4 21.Rac1 f6 22.Red1 Qf7 23.Ba3 Red8 24.g3 (24.Bb7? Rb8 25.Bf3 Nd3–+) 24...b6 25.Bb7 Rb8 26.Bg2 ½–½. aspasio (2760) – jessamine, net–chess.com, 2013.

7.Nf3 Qe7 8.0–0 Re8 9.d4 Nb6 10.Nbd2 Na4 11.Qc1 c6 12.Rb1 Ne4 13.Ne4= de4 14.Ne5 Nb2 15.Qb2= Bd6 16.Nc4 Bc7 17.Rfe1 Qf6 18.Qc3 Rb8 19.f4 ef3 20.Bf3 c5 21.a4 b6=+ 22.Rf1 cd4 23.ed4= Qh4 24.Ne5 Be5 25.de5 Ba6 26.Rf2 Rbc8 27.Qe3 Rc5 28.e6 fe6 29.Be4 Qh5 30.Rf3 Qg5–/+ 31.Rf4 h6 32.h4 Qh5 33.Qg3 Rd8 34.Bg6 Qd5 35.Kh2 Rd7 36.Be4 Qe5 37.Re1 Qc7 38.Bg6 Rc4 39.Ref1 Rf4 40.Rf4 Bb7 41.h5 Qb8 42.Qf2 Bc6 43.Kh3 a5 44.Rf8 Qf8 45.Bh7 Kh7 46.Qf8 Ba4 47.c4 Rd3 48.Kh2 Rd4 49.Qa3 Bc6–/+ 50.c5 Rh4 51.Kg3 Rh5 52.cb6 Rg5–/+ 53.Kh4 Bg2 54.Qb2 Bb7 ½–½. Godoy,Mario D – Tavinski,Samantha, corr ICCF WS/H, 2005.

3.Nf3 e6

4.a3!

4.b5 Bd7 5.e3 a6 6.ba6 Na6 7.Nc3 Bd6 8.Ne2 0–0 9.Ng3 Ba4 10.a3 Qe7 11.Ng5 Nc5 12.h4 Bg3 13.fg3 Nce4 14.Be5 Bc6 15.d3 Nd6 16.Qf3 Ra4 17.Bf6 Qf6 18.d4 Qf3 19.Nf3 Rfa8 20.Bd3 Ra3 21.Ra3 Ra3 22.0–0 Bb5 23.Bb5 Nb5 24.Re1 Nc3 25.Kh2 Ne4 26.Rc1 Re3 27.Ra1 f6 28.Ra8 Kf7 29.Ra1 Rc3 30.Rc1 b6 0–1. Von Oppen – Klafki, Koblenz 1990.

4.c3 a6 5.d3 b5 6.e3 h6 7.a4 Bb7 8.ab5 ab5 9.h3 (9.Ra8 Ba8 10.Na3 c6+=) 9...Nc6 (9...Ra1 10.Ba1 Bd6 11.Na3=) 10.Be2 Bd6 11.0–0 Ra1 12.Ba1 Ne5 (better is 12...0–0!?=) 13.Ne5+/– Be5 14.f4 (14.d4!? Bd6 15.Bb5 c6 16.Bd3+=) 14...Bd6= 15.Bf3 0–0 16.Nd2 c5 17.bc5 Bc5 18.d4 Bd6 19.Qb3 Ne4 (better is 19...Qd7!?+=) 20.Ne4 de4 21.Be2 Bc6 22.Bb5 Bb5 23.Qb5 f5 (23...Qa8 24.Qb6 Be7 25.Rb1+=) 24.g3 (24.c4 Bc7+/–) 24...Kh7 25.Rb1 h5 (25...Qa8 26.Qf1+/–) 26.Qb6 Rf7?? (better is 26...Qe7 27.Qa6 h4+/–) 27.Qd8+– Be7 28.Qe8 Kg6 29.Rb3 (29.Rb7 Kh6 30.Qf7 e5 31.Qe7 h4 32.Qg7 Kh5 33.Qg5) 29...Kf6 30.Bb2 (30.d5 Kg6 31.Rb7 Bg5 32.Qf7 Kh6 33.Qg7) 30...Bd6+– 31.Ba3 Ba3 32.Qf7! Kf7 33.Ra3 g6 (33...Kf6 34.c4 Ke7 35.Ra7 Ke8 36.Rg7+–) 34.Ra5 (34.Ra7 Ke8+–) 34...Kf6 35.c4 g5 36.c5 gf4 37.c6 (better is 37.gf4 Ke7 38.Ra7 Kd8 39.Rh7+–) 37...fg3 (37...Ke7 38.d5 Kd6+–) 38.c7 h4 (38...Kf7 39.c8Q Kf6 40.Qg8 h4 41.Ra7 e5 42.Qg7 Ke6 43.Qe5) 39.c8Q Kf7 (39...f4 40.Qd8 Kf7 41.Ra7 Kg6 42.Qg8 Kf5 43.Rf7) 40.Ra7 Kf6 41.Qf8 Kg6 42.Rg7 Kh5 43.Qh8 1–0. mpopp (2170) – valerypavlovich (2100), net–chess.com, 2016.

4.c3 Bd6 5.d4 0–0 (5...Nbd7 6.e3+=) 6.Nbd2 b6 (6...Nbd7 7.e3+=) 7.e3 c5 (7...c6 8.Ne5+=) 8.b5 (8.dc5!? bc5 9.bc5 Bc5 10.c4=) 8...a6+= 9.dc5 bc5 10.c4 Bb7 (10...ab5 11.cb5 Re8 12.Be5+=) 11.cd5 (11.a4 ab5 12.ab5 Ra1 13.Ba1 Nbd7+=) 11...ed5+= 12.a4 Nbd7 13.ba6 Ba6 14.Ba6 Ra6 15.0–0 Qc7 16.h3 Rfa8 17.Qc2 (17.Bc3 Qa7–/+) 17...Nb6 (17...Qc6 18.Rfc1–/+) 18.Bf6= gf6 19.Qf5 (19.e4 d4+=) 19...Ra4 (19...Be5 20.Ne5 Qe5 21.Qf3+=) 20.Ra4= Ra4 (worse is 20...Na4 21.Qd5 Nb6 22.Qf5+/–) 21.Qf6 Qe7 22.Qf5 h6 23.Rb1 Nc4 (23...Ra6 24.Qh5=) 24.Qc8 (24.Qd5!? Qe6 25.Qe6 fe6 26.Nc4 Rc4 27.Rd1+/–) 24...Qf8= 25.Qg4 (25.Qc6 Qa8 26.Qa8 Ra8 27.Nc4 dc4 28.Rc1+=) 25...Kh8 (better is 25...Qg7!? 26.Qd7 Ra1 27.Qc8 Bf8 28.Ra1 Qa1 29.Nf1 Qf6=) 26.Nc4+/– Rc4 (26...dc4 27.Rd1+/–) 27.Qf5 (27.Qh5 Rb4 28.Rd1 Rb8+/–) 27...d4 (27...Qe7 28.Qd5 Qe4 29.Qd1+/– (29.Qd6?! Qb1 30.Kh2 Qf5=)) 28.Qf6 (28.ed4 cd4 29.Qf6 Kh7 30.Nd4 Qe7 31.Qf5 Kg8+/–) 28...Kg8 (28...Kh7 29.ed4 cd4 30.Nd4+/–) 29.ed4 Be7 30.Qe5 Bd6 31.Qd5 Rb4 32.Ra1 Kg7? (better is 32...Qb8 33.g4 Rb1 34.Rb1 Qb1 35.Kg2 Qb6+–) 33.Nh4+– Kg8 (33...Kh7 34.Nf5 Rb6+–) 34.Ng6?? (better is 34.Nf5 Bc7 35.Qd7+– (35.Qc5?! Qc5 36.dc5 Rc4+–)) 34...Qb8+/– 35.f4?? (35.Ne5 Rb1 36.Rb1 Qb1 37.Kh2=) 35...Rb1–+ 36.Rb1 Qb1 37.Kf2 (37.Kh2 Qg6 38.dc5 Bf4 39.Kg1 Be3 40.Kh2 Qc2–+) 37...Qg6 38.dc5 Qc2 39.Kg3 (39.Kf3 Bc5 40.Qd8 Kg7–+) 39...Qc5 (39...Bc5 40.Kf3–+) 40.Qc5 Bc5 41.Kg4 Kg7 (41...Bf2 42.Kf5–+) 42.f5 (42.Kf5 Bf2–+) 42...Be3 (42...Kf6 43.Kh5 Be3 44.Kg4–+) 43.Kf3 Bc1 44.g4 Kf6 45.Ke4 (45.Kg3 h5!–+) 45...Bb2 (45...Kg5 46.Kf3 Ba3 47.Kg2–+) 46.h4 Bc1 47.Kf3 Ke5 (47...h5 48.Kg3–+) 48.Kg3 Ke4 49.h5 f6 50.Kh4 (50.g5 Bg5 51.Kg4–+) 50...Kf3 51.Kh3 Bg5 0–1. gumshoe (2325) – coora (2415), net–chess.com, 2014.

4.b5 a6

5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4 Be7 9.e3 0–0 10.Be2 Nbd7 11.d3 dc4 12.dc4 b6 13.Bd3 Bb7 14.Nbd2 Qc7 15.Qc2 h6 16.Bc3 Ng4 17.Be4 Bf6 18.h3 Be4 19.Ne4 Bc3 20.Qc3 Nge5 21.Nfd2 Ra8 22.0–0 Qd6 23.Ra1 ½–½. Typek – Dzieniszewski, Gizycko 1985.

5.a4 Be7 6.e3 0–0 7.c4 ab5 8.ab5 Ra1 9.Ba1 b6 (9...Nbd7 10.Qc2+=) 10.cd5 Nd5 11.Be2 Bb7 12.0–0 Nd7 13.d4 c5 (13...Bd6 14.Nc3=) 14.bc6 Bc6 15.Nc3 Nc3 16.Bc3 b5 (16...Qc7 17.Bd2=) 17.Qb1 Qb6 18.Bb4 Bb4 19.Qb4 Qb7 20.Rc1 h6 21.h3 (21.Qd6 Rc8+=) 21...Nf6 22.Qd6 Bd5 23.Qb4 Bc6 24.Ne1 Nd5 (24...Ra8 25.Qc5 Rc8 26.Bf3+=) 25.Qd6 Rc8 26.Nd3 (26.e4 Nb6 27.f3 Qd7 28.Qd7 Bd7 (28...Nd7? 29.Bb5 Bb7 30.Nd3 Rc1 31.Nc1+–) 29.Rc8 Nc8=) 26...b4= 27.Nc5 Qa8 28.Ba6 Rd8 29.Qe5 (29.Qg3 Nc3 30.Bd3 Bd5=) 29...Nc3+= 30.Bf1 Bd5 31.Qc7 Rc8 32.Qb6 (32.Qd7!?+=) 32...Qa3–/+ Black prepares the advance b3 33.Re1 b3 34.e4 Ba8 (34...Ne4 35.Ne4 Be4 36.Re4–/+) 35.Nb3 Ne4 36.Bd3 Qd6 (36...Nd2 37.Qa6 Qa6 38.Ba6=) 37.Qd6 ½–½. Teichmann,Erik O M C (2310) – Garcia Ramos,Daniel (2195), 18th Obert Internacional Sant Marti Gro, 2016.

4.b5 c5

5.a4 Bd6 6.c4 d4 7.d3 0–0 8.g3 b6 9.Nd4 Bb7 10.Nf3 Nbd7 11.Bg2 Qc7 12.0–0 e5 13.Nc3 Rfe8 14.e4 Rad8 15.Nd5 Nd5 16.ed5 Nf6 17.Re1 Bc8 18.a5 Bg4 19.a6 h6 20.h3 Bh5 21.Re3 Nh7 22.Qc2 Re7 23.Nh4 Qd7 24.g4 Bg6 25.Ng6 fg6 26.Rae1 Rde8 27.Be4 Nf6 28.Bg6 Ng4 29.hg4 1–0. Woschkat – Hornyak, CIF 1991.

5.c4 dc4 6.Nc3 Nbd7 7.e4 (7.e3 Bd6=) 7...a6 (7...Bd6 8.Bc4 0–0 9.Be2=) 8.a4 (8.ba6 ba6 9.Bc4 Bd6=) 8...b6 (8...ab5!? 9.Nb5 Ne4=) 9.Bc4+= Bb7? (9...ab5 10.Bb5 Bb7 11.0–0+=) 10.d3 (better is 10.ba6!? Ra6 11.Ba6 Ba6 12.Qc2+–) 10...Be7 (10...a5 11.Qb3=) 11.ba6+= Ba6 12.Nb5 0–0 13.Ne5 (better is 13.0–0!?+=) 13...Ne5+= 14.Be5 Bb5 (14...Nd7 15.Bc3+=) 15.ab5 Nd7 16.Bb2 Bf6 17.Bf6 Nf6 18.0–0 Qd4 19.Ra6 Ra6 (19...Rab8!? 20.Qe2 Nd7=) 20.ba6+= Ne4 21.Qe2 (better is 21.a7!? Nc3 22.Qf3+=) 21...Nd6+= 22.Rb1 b5 23.Qf3 (23.Qa2 g6 (worse is 23...bc4 24.a7 Qd3 25.Qa1+–) 24.a7 Ra8 (24...bc4 25.Rb8 cd3 26.Rf8 Kf8 27.a8Q Kg7 28.Q8a4+–) 25.Bb5 Nc8+=) 23...Nc4+= 24.dc4 Qc4 25.Qb7 b4 26.h3 Qd5 27.Qb6 (27.Rc1 Qd2 28.Rc4 g6+=) 27...h6 (27...g6 28.a7 Ra8 29.Rc1–/+) 28.a7+= Ra8 29.Rc1 Qd7 (29...Kh7 30.Rc5 Qd4 31.Qb7 Qa1 32.Kh2 Ra7 33.Qb4–/+) 30.Qb8 Qc8 31.Qb6 c4 32.Qb4 Ra7 33.Qc4 ½–½. Ovcharenko,Leonid – Kapkan,Evgeniy, 2007. (=1.Nf3 d5 2.b4 e6 3.Bb2 Nf6 4.b5 c5)

5.g3 Qa5 6.a4 Bd7 (6...Nbd7 7.Ne5+=) 7.Bg2= Bd6 8.0–0 0–0 9.d3 a6 10.c4 Qc7 (10...d4 11.e3 e5 12.Nfd2=) 11.Nc3 (11.Bf6!? gf6 12.Na3+=) 11...d4+= 12.Nb1 ab5 13.ab5 Ra1 14.Ba1 Qa5 15.Bb2 e5 16.Nfd2 Bf5 (better is 16...Qb6!?+=) 17.Bb7+= Nbd7 18.Bg2 Nb6 19.Nb3 Qa7 20.N1d2 Qd7 21.Re1 Bh3 22.Bh1 Ng4 (22...Bf5 23.Bc6 Qe6 24.Ba3+/–) 23.Na5 (23.Ne4 Rc8+/–) 23...f5 24.Nf3 (better is 24.Bc6 Qc7 25.Nb7+/–) 24...e4? (better is 24...f4!?+=) 25.Ng5+– Nf2 26.Kf2 e3 (26...f4 27.Be4 fg3 28.Kg1 Qg4 29.Bh7 Kh8–+) 27.Kg1 Bg4 28.Rf1 h6 29.Nf3 Qc7 (29...f4 30.Qe1+–) 30.Kg2 f4 31.h3 Bf3 32.Rf3 (32.Kf3?! Nd5 33.cd5 Qa5+/–; 32.ef3?! Nd5 33.Nc6 e2 34.Qe2 Ne3 35.Kg1 Nf1 36.Kf1 fg3 37.Qe6 Kh8+–) 32...Nd7 33.Nc6 Ne5 (33...fg3 34.Qf1+–) 34.Ne5 Be5 35.g4 Rf6 36.Kg1 Rg6 37.Bg2 1–0. algernon (2315) – hobgoblin (2410), net–chess.com, 2016.

5.g3 a6 6.ba6 Na6 7.Bg2 Be7 8.a3 0–0 9.0–0 d4 (9...b5 10.a4 ba4 11.Ra4+=) 10.e3 de3 11.de3 Nc7 12.c4 Qd1 13.Rd1 Rd8 14.Nc3 Rb8 (14...Nd7!?=) 15.Rd8+/– Bd8 16.Rd1 Bd7 17.Ne5 Be8 18.f3 Be7 19.g4 h6 20.f4 b5 21.Ba1 (21.g5!? hg5 22.fg5+=) 21...b4= 22.ab4 cb4 23.Ne4 b3 24.Bb2 Na6 25.Bf3 (25.Ra1!? Ne4 26.Ra6+=) 25...Ne4+= 26.Be4 Nc5 27.Bb1 Na4 28.Bc1?? (better is 28.Bd4+=) 28...Nc3–+ (28...Nc3 29.Rd4 f6–+) 0–1. mic (2330) – fleeble (2455), net–chess.com, 2016.

4.b5 Bc5

5.d4 Bd6 6.c4 (6.e3 a6=) 6...c6 7.e3 cb5 8.cb5 (8.c5 Be7=) 8...0–0 (8...a6 9.Qa4=) 9.Bd3 Re8 (9...a6 10.Nc3=) 10.Nbd2 (10.0–0 Qe7=) 10...Nbd7 (10...a6 11.Qa4=) 11.Qc2 (11.0–0 Qa5=) 11...Nf8 (11...Nb6 12.0–0=) 12.0–0 Bd7 13.Rfc1 Rc8 14.Qd1 Qb6 (14...Qa5 15.a4+=) 15.a4+= a6 (15...Bb4 16.Ne5+=) 16.a5 Qa7 17.b6 Qb8 18.Ba3 Ba3 19.Ra3 Qd6 20.Rac3 Rc3 21.Rc3 Qb4 22.Qa1 Rc8 23.Rc8 Bc8 24.Qc1 (24.Nb1 Qb3 25.Nc3 Qb4+/–) 24...Bd7+= 25.Qc7 (25.Qc5 Qa4+/–) 25...Qa5 (better is 25...Bc6!? 26.Ne5 N6d7 27.Nd7 Nd7=) 26.Qb7+/– Bb5 (26...Ba4 27.Qa6 (27.Ba6?! N6d7+=) 27...Qa6 28.Ba6+/–) 27.Bb5+– Qb5 28.Ne5 Ne4?? (better is 28...Qe8+–) 29.Qf7 1–0. zack1984 (2040) – notsana (1850), gameknot.com, 2016.

5.e3 0–0 6.Be2 c6 7.0–0 a6 8.ba6 Na6 9.d4 Bd6 10.Nbd2 Qc7 11.c4 dc4 12.Nc4 b5 13.Nd6 Qd6 14.a4 ba4 15.Ra4 c5 16.dc5 Qc5 17.Bf6 gf6 18.Qa1 Qf5 19.Ba6 1–0. Rosner,Dirk – Borchard,Sandra, Tiger SC, 2000.

5.e3 a6 6.Nc3 ab5 7.Bb5 c6 8.Be2 0–0 9.0–0 b5 10.a3 Bb7 11.d4 Be7 12.Bd3 Nbd7 13.Re1 Bd6 14.e4 de4 15.Ne4 Ne4 16.Be4 Nf6 17.Bd3 Nd5 18.c4 Nf4 19.Bf1 bc4 20.Bc4 Ba6 21.Ba6 Ra6 22.Qc2 Nd5 23.Ne5 Attacks the isolani on c6 23...Be5 24.de5 Qg5 25.Qd3 (25.Bc1 Qh4=) 25...Ra4 (better is 25...Qg2 26.Kg2 Nf4 27.Kf1 Nd3–/+) 26.Rac1?? (26.Re4 Nf4 27.Qf3 Re4 28.Qe4 Rd8+=) 26...h5?? (better is 26...Qg2! 27.Kg2 Nf4 28.Kf1 Nd3–+) 27.Rc6 (27.Re4 Nf4 28.Rf4 Rf4 29.Rc6+=) 27...h4?? (better is 27...Qg2! 28.Kg2 Nf4 29.Kf1 Nd3–/+) 28.Bc1+/– Qg4 29.f3 Qh5 30.Qc2 Raa8 31.Bb2 h3 32.gh3 (32.g4!? Qh4 33.Qf2+/–) 32...Nf4 (better is 32...Qf3 33.Qf2 Qh3=) 33.Qe4?? (better is 33.Re3=) 33...Nh3 (better is 33...Qg5 34.Kf2 Qg2 35.Ke3 Nd5 (worse is 35...Qb2 36.Rc2 Qb3 37.Kf4–+) 36.Qd5 ed5–+) 34.Kg2+/– Ng5 (34...Rfc8 35.Rec1 Rd8 36.R1c2+/–) 35.Qg4 Qg4 36.fg4 Rfd8 37.Re2 (37.Bc1 Ra4 38.h3 Ne4+/–) 37...Rd3 (37...Ra4 38.Kf2+=) 38.Rcc2 (38.Rc4 Nf3+/–) 38...Rb8? (38...Ra4 39.Kf1=) 39.Rcd2 (39.Rc3 Rc3 40.Bc3 Rb3+/–) 39...Rbb3 (better is 39...Nh3!? 40.Rd3 Nf4 41.Kf3 Nd3+=) 40.Rd3+– Rd3 41.Bc1 (41.a4 Nf3+–) 41...f6 (better is 41...Nf3!?+/–) 42.ef6+– gf6 43.Bg5 fg5 44.Re6 Ra3 (better is 44...Kf7 45.Re5 Kg6+–) 45.Rg6 Kf7 46.Rg5 Ra2 47.Kg3 Ra3 48.Kh4 Ra8 (48...Rc3 49.h3+–) 49.h3 Kf6 50.Rf5 Kg6 51.Kg3 Ra3 52.Rf3 Ra1 53.h4 Rg1 54.Kf4 Rb1 55.Re3 Rb4 (55...Rf1 56.Ke5+–) 56.Re4 Rb1 57.h5 Kh6 58.Re6 Kg7 59.Kf5 1–0. tightfist (2430) – rpanugaling (2405), net–chess.com, 2016. (=1.Nf3 Nf6 2.b4 e6 3.b5 d5 4.Bb2 Bc5)

4.b5 c6

5.a4 cb5 6.ab5 Be7 7.e3 b6 8.d4 0–0 9.Nbd2 Nbd7 (9...a6 10.Bd3=) 10.c4. croach (2360) – redrook (2100), net–chess.com, 2016.

5.a4 Be7 6.e3 0–0 7.d4 Nbd7 8.Bd3 c5 9.0–0 c4 10.Be2 Ne4 11.Nfd2 Ndf6?! (11...f5) 12.f3 Nd6 13.Re1 Qc7 14.Nf1 Qb6 15.Nc3 Nf5 16.a5 Qd8 17.e4 de4 18.fe4 Nd4 19.Bc4 e5 20.Ba3 Ba3 21.Ra3 Nc2?? 22.Qc2 Qd4 23.Ne3+– Ng4 24.Ncd5 Be6 25.Rd3 Qc5 26.h3 Bd5 27.Bd5 Qc2 28.Nc2 Nf6 29.Bb7 Rad8 30.Red1 Rde8 31.g4 Re7 32.Bc6 g5 33.Ne3 h5 34.Kg2 Rc7 35.Rd6 Ne8 36.Rd8 Nf6 37.Nf5 hg4 38.Rf8 1–0. Gaggiottini – Barni, 1995.

5.e3 a6 6.a4 +=.

5.e3 g6 6.a4 a6 7.d3 (better is 7.Nc3!?=) 7...ab5+= 8.ab5 Ra1 9.Ba1 Qa5 10.Nbd2 Bg7 11.Be2 0–0 12.bc6 Nc6 13.0–0 Bd7 14.c4 Ra8 15.Qb3 Ng4 (15...dc4!? 16.Nc4 Qa2 17.Qb7 Rb8=) 16.Bg7+= Qd2?? (better is 16...Kg7 17.Qb7 Nf6 18.cd5 ed5+/–) 17.Nd2+– (17.Nd2 Kg7 18.Bg4+–) 1–0. marekt – guest_Ileotecher, internet, 2015.

4.b5 Nbd7

5.e3 Bd6 6.d4 0–0 7.Bd3 c5 8.bc6 bc6 9.c4 Rb8 10.Qc2 dc4 11.Bc4 c5 12.Nbd2 Nb6 13.Bd3 cd4 14.Bd4 Bb7 15.Ke2 Nbd5 16.a3 Qe7 17.Nc4 Rfc8 18.Qa4 e5 19.Nd6 Qd6 20.Be5 Qe5 21.Ne5 Nc3 22.Ke1 Na4 23.f3 Rc5 24.f4 Rbc8 25.Kf2 Ne4 26.Kf3 Nac3 27.Rhg1 Rd8 28.Bc2 Nf6 29.Kg3 Ne2 0–1. Tuchtenhagen – Bauer, 1995.

5.e3 Bd6 6.Be2 0–0 7.0–0 e5 8.d4 e4 9.Nfd2 Ne8 10.c4 f5 11.h3 c6 12.a4 f4 13.cd5 f3 14.dc6 fg2 15.Kg2 Qg5 16.Bg4 Ndf6 17.f4 Qg6 18.cb7 Bg4 19.hg4 Ng4 20.Qb3 Kh8 21.ba8Q Ne3 22.Kf2 Bf4 23.Qe3 1–0. Welti – Grimstad, corr Switzerland–Norway 1994.

5.g3 Be7 6.Bg2. TomJobe – TheWelshKnight, ChessWorld.net, 2014.

4.b5 Be7

5.a4 0–0 6.Ne5 (6.e3!?+=) 6...Nbd7 7.d4 (7.e3 Bd6 8.Nf3 Re8–/+) 7...c5 8.e3 Ne4 9.Nd2 Ne5 10.de5 f6 (better is 10...Qa5 11.c3 Nc3–/+) 11.Ne4+= de4 12.Bc4 Qa5 13.c3 Qc7 14.ef6 Bf6 15.Qg4 Qe5 16.Qf4 Qf4 17.ef4 Kh8 18.0–0 e5 19.fe5 Be5 20.Rfe1 Bf5 21.Bd5 Rad8 22.Rad1 (22.Be4!? Be4 23.Re4+=) 22...b6= 23.Bc6 Rd1 24.Rd1 Bf6 25.a5 h5 26.ab6 ab6 27.Rd5 Bg6 28.h3 Bf7 29.Rd7 h4 30.Be4 Be8 31.Rb7 Bb5 32.Rb6 Bc4 33.Rc6 Rd8 (33...Re8!? 34.f3 Bg5+=) 34.Rc5+/– Be2 35.f3 Rb8?? (35...Bd3 36.Rd5 Bc4 37.Rd8 Bd8 38.Bc1+–) 36.Ba1 (better is 36.Rh5 Kg8 37.Bd5 Kf8 38.Rh8 Ke7 39.Rb8+–) 36...Kg8 37.Bg6 (37.Kf2 Bb5+–) 37...Kf8 38.Kf2 Bd1 39.Be4 Rd8 40.Rd5 Rd5 41.Bd5 Ke7 42.Ke3 Kd6 43.Bg8 Kc5 (43...Bc2 44.Bb2+–) 44.Bb2 Kd6 45.Ba3 Ke5 46.c4 Bg5 47.Kd3 Bf6 48.Bb2 Kf4 (48...Kd6 49.Bf6 gf6 50.Kd4+–) 49.Bf6 gf6 50.c5 Ba4 51.Bd5 Kg3 52.Bb7 (better is 52.f4 Kf4 53.c6+–) 52...Kg2+/– 53.c6 Bc6?? (53...Kh3 54.Bc8 Kg3+/–) 54.Bc6 Kh3 (54...f5 55.Kd4 Kg3+–) 55.Ke4 Kg3 56.Kf5 h3 57.f4 h2 58.Bb7 Kf2 59.Kf6 Kg1 60.Ke5 h1Q (60...Kf2 61.f5 Ke3 62.f6 Kd3 63.f7 Kc3 64.f8Q Kb3 65.Bd5 Kc3 66.Qa3 Kd2 67.Bf3 h1Q 68.Bh1 Kc2 69.Be4 Kd2 70.Qf3 Ke1 71.Qe3 Kd1 72.Qf2 Kc1 73.Qc2) 61.Bh1 Kh1 62.f5 Kg2 (62...Kh2 63.f6 Kg3 64.f7 Kf2 65.f8Q Kg2 66.Qf7 Kh2 67.Qg8 Kh3 68.Kf4 Kh2 69.Kf3 Kh3 70.Qg3) 63.f6 Kg3 64.f7 Kg4 (64...Kf3 65.f8Q Ke3 66.Qf5 Kd2 67.Kd4 Ke2 68.Qf8 Kd1 69.Kd3 Ke1 70.Qf4 Kd1 71.Qd2) 65.f8Q Kg5 (65...Kg3 66.Qf1 Kh2 67.Kf5 Kg3 68.Qe2 Kh3 69.Kf4 Kh4 70.Qg4) 66.Qg7 Kh5 (66...Kh4 67.Kf4 Kh5 68.Qg5) 67.Kf4 Kh4 68.Qh7 1–0. croach (2385) – jjrizzo (2470), net–chess.com, 2015.

5.g3 0–0 6.Bg2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c6 10.bc6 bc6 11.0–0 Nbd7 12.Nc3 Qa5 13.Nd4 Qc7 14.e3 Ba6 15.Re1 h6 16.f3 Rb8 17.Nb3 Qb6 18.Kh1 Bc4 19.Nd4 c5 20.Nde2 Bd6 ½–½. mic (2340) – rhand (2545), net–chess.com, 2016.

3.Nf3 Bf5

(--> 1.b4 d5 2.Bb2 Bf5 3.Nf3 Nf6).

4.a3 e6 5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3).

4.b5 e6 5.e3 Nbd7 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.b5 Nbd7 7.Nf3).

4.c4 c6 5.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.c4).

4.g3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.Nf3 e6 4.g3 Nf6).

4.e3

4.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3).

4.e3 c6 5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.e3 h6 5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

4.e3 Nbd7

5.a3 e6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.c4 e6 6.b5 c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 c5 6.c4 Nbd7).

5.d4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

5.Be2 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.Be2).

5.Be2 e6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

4.e3 e6

(-->1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6).

5.a3 c5 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 c5).

5.a3 c6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

5.a3 Bd6 6.c4 c6 7.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.Be2 Bd6).

5.a3 Bd6 6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3 Bd6).

5.a3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

5.a3 Nbd7 6.c4 a5 7.c5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.c5 a5 7.a3).

5.a3 Nbd7 6.c4 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.a3 Nbd7 7.Nf3).

5.a3 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

5.a3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

5.a3 Be7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Be7).

5.b5 Bd6 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Bd6).

5.b5 Bd6 6.Be2 0–0 7.0–0 h6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Bd6 6.Be2 h6 7.0–0 0–0).

5.b5 Bd6 6.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2 Bd6).

5.b5 Nbd7 6.c4 c6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5 Nbd7).

5.c4 dc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4).

5.c4 dc4 6.Bc4 Nc6 7.a3 Bd3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nc6 6.a3 dc4 7.Bc4 Bd3).

5.c4 Nbd7 6.a3 dc4 7.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 dc4 5.Bc4 e6 6.a3 Nbd7 7.Nf3).

3.Nf3 g6

4.b5 Bg7 5.e3 0–0 6.Be2 Nbd7 7.d4 c6 8.a4 Ne4 9.0–0 Qb6 10.Nc3 Nc3 11.Bc3 Nf6 12.Bb4 Ne4 13.Be7+/– Re8 14.Bb4 Bf5 15.a5 Qd8 16.Ra3 Ng5 17.c3 Be4? 18.Nd2 Nh3? 19.Kh1 Qh4? 20.Qe1 Ng5 21.Ne4 Re4 22.Bd6 Rae8 23.Bg3 Qh6 24.a6 Re3?? 25.fe3 ba6 26.Ra6 cb5 27.Bb5 Re4 28.Ra7 Rg4 29.Ra8 Bf8 30.Bd7 Rg3 31.Qg3 Ne4 32.Qf4 Qg7 33.Qe5 Qh6 34.Qd5 Ng3 35.Kg1 Qe3 36.Rf2 Qe1 (36...Qe1 37.Rf1 Qf1#) 0–1. mic (2130) – rogeliovargas (2180), net–chess.com, 2008.

4.c4 c6 5.e3 Bg7 6.Nc3 0–0 7.Be2 Nbd7 8.Qb3 Nb6 9.d3 Re8= 10.a4 Bg4 11.0–0 e6 12.a5 Nbd7 13.h3 Bf3 14.Bf3 Rb8 15.Rfc1 b6 16.a6 Rc8 17.Ne2 Nb8 18.Rc2 Qe7 19.b5 cb5 20.cb5 Rc2 21.Qc2 Qd7 22.Be5 Rc8 23.Qa4 Ne8 24.Bg7 Kg7 25.e4 de4 26.de4 Rc5 27.Rd1 Qc7 28.Qd4 e5 29.Qd8 Nf6= 30.g4 h6 31.h4 Qd8=+ 32.Rd8 Nfd7 33.g5 h5 34.Bg2 Rb5 35.Bh3 Rb1 36.Kg2+/– Rb3 37.Bd7+– Na6 38.Bc6 Nc5 39.Re8 a5? 40.Ra8 Ne6? 41.Ra7 Rb2+/– 42.Bd5 Re2 43.Be6 Re4 44.Rf7 Kh8 45.Kg3 Rb4 46.Ra7 Ra4 47.f3 Ra3 48.Bd5 b5 49.Be4 a4 50.Bg6 b4 51.Be4 Ra1 1–0. Castro Rojas,Oscar Humberto (2360) – Rodriguez,Jose ES, COL–ch Bogota, 1975.

4.c4 e6 5.e3 Bg7 6.b5 c5 7.Be2 Nbd7 8.0–0 0–0 9.cd5 Nd5 (9...ed5 10.Nc3=) 10.Bg7+= Kg7 11.Na3 (11.Nc3 Nc3 12.dc3 Qc7+=) 11...N5b6 (11...Qf6 12.Nc4=) 12.Rc1 Qe7 13.Qc2 Nd5 (13...e5 14.Nc4+=) 14.Nc4 b6 15.Qb2 Kg8 16.Nfe5 (16.d4 a6 17.a4 Bb7+=) 16...Ne5 17.Ne5 Bb7 18.Ng4 (18.d4 f6 19.Nf3 a6+=) 18...f6= 19.f4 =. Querol Soro,Sergio (2020) – Burguete,C (1665), San Jose op, 1998.

4.d3 Bg7 5.Nbd2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.d3 0–0 5.Nbd2 d5).

4.e3 a6 5.c4 c6 6.cd5+= cd5 7.Nc3 Bg7= 8.d4 0–0 9.Be2 Nc6 10.b5 Na5 11.ba6 ba6 12.Ne5 Rb8 13.Qc1 Bb7 14.0–0 Nd7 15.Nd7 Qd7 16.Rb1 Rfc8 17.a4 e5=+ 18.de5 Be5 19.Qd2 Ba8?? 20.Nd5+/– Bb2?? 21.Nf6!!+– Bf6 22.Qd7 (22.Qd7 Kg7 23.Rb8 Rb8 24.Ba6+–) 1–0. Bonetti,Shane – Acornn (1610), ICC, 2002.

4.e3 e6 5.b5 a6 6.g4 h6 7.a4 Bd6 8.h4 Nbd7 9.Rg1 e5 10.g5 Ng8 11.c4 hg5 12.hg5 Rh5 13.cd5 e4 14.Nd4 Rg5 15.Rh1 Nc5 16.ba6 Ra6 17.Nc3 Nd3 18.Bd3 ed3 19.Qb3 Rh5 20.Rh5 gh5 21.Qb5 Bd7 22.Qd3 (22.Qb7? Rb6 23.Qa7 Bg4–+) 22...Qg5 23.Qe4 Ne7 24.Qh1 Qg4 25.Ba3 Ba3 26.Ra3 Rg6 27.Rb3 b6 28.Nde2 h4 29.a5 h3 30.a6 Qg2 31.Qg2 (31.Qg2 hg2 32.Ng1+/–) 1–0. Rooijen Van,Peter (1655) – Baptista,Rui, OP–2009–0–00804, 2009.

4.e3 Bg4 5.h3 Bf3 6.Qf3 Bg7 7.c4 c6 8.cd5 cd5 9.Bb5 Nbd7 10.d4 0–0 11.0–0 Qb6 12.Bd7 Nd7 13.Qd5 Qb4 14.Ba3 Qa4 15.Be7 Nf6 16.Qf3 Rfe8 17.Bf6 Bf6 18.Qf6 Qc2 19.d5 b5 20.Nc3 Qd3 21.Rfd1 Qc4 22.Rac1 Rac8 23.d6 Re6 24.Qg5 h5 1–0. Machete99 – guest1975, ICC, 2002.

4.Bf6 ef6 5.a3 Bg7 6.e3 0–0 7.c4 Re8 8.cd5 f5 9.Nc3 Nd7 10.Bb5 Qf6 11.0–0 g5 12.Rc1 c6 13.Ba4 g4 14.Nd4 Ne5 15.dc6 bc6 16.Nc6 Qh6 17.Ne5 Be5 18.g3 Bb7 19.f4 gf3 20.Rf3 Bf3 21.Qf3 Bc3 22.Be8 Bd2 23.Bf7 Kg7 24.Rc7 Be3 25.Kg2 Rd8 26.Bd5 Kh8 27.Qf5 Bd4 28.h4 Rf8 29.Rh7 1–0. Bulcourf – Petrungaro, Buenos Aires 1992.

4.g4 h6 5.h4 Bg7 6.Bg2 Bg4–/+ 7.b5 0–0 8.Rg1 c6 9.bc6 bc6 10.c3 Qb6 11.Qc2 Ne4 12.d3?? Qf2 13.Kd1 Bf3 14.Rf1 Qg2 15.de4 Qf1 (15...Qf1 16.Kd2 Qe2 17.Kc1 Qe1 18.Qd1 Qd1#) 0–1. verns2 – malathi, internet, 2010.

4.a3 Bg7

5.e3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

5.e3 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.a3).

4.d4 Bg7

5.e3 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4).

5.e3 0–0 6.Nbd2 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.d4 0–0 5.Nbd2 d5 6.e3).

5.e3 0–0 6.Nbd2 c6 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2).

4.e3 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5).

5.c4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5).

5.c4 0–0 6.d4 Ne4 7.Nc3 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nc3 Ne4).

5.c4 0–0 6.Be2 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

5.c4 c6 6.a4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.a4 d5).

5.c4 c6 6.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

5.c4 c6 6.d4 e6 7.Nbd2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 e6).

5.c4 c6 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

5.d3 0–0 6.Be2 c6 7.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 c6 7.d3).

5.d3 c6 6.Be2 0–0 7.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 c6 7.d3).

5.d4 0–0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d5 6.d4).

5.d4 0–0 6.Nbd2 Nbd7 7.c4 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 Nbd7).

5.Be2 0–0 6.0–0 c6 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5 7.0–0).

5.Be2 0–0 6.d3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.d3 0–0 6.Be2).

5.Be2 a6 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 a6).

4.g3 Bg7

(--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 d5).

5.d3 0–0 6.Nbd2 c6 7.Bg2 Bg4 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6 7.d3 Bg4 8.Nbd2).

5.d3 c6 6.Nbd2 0–0 7.Bg2 Re8 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6 7.d3 Re8 8.Nbd2).

5.Bg2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5).

5.Bg2 0–0 6.0–0 a5 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 a5).

5.Bg2 0–0 6.d3 c6 7.Nbd2 Bg4 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6 7.d3 Bg4 8.Nbd2).

3.Nf3 h6

4.a3 a6 5.e3 Nc6 6.d4 Bg4 7.Be2 Bf3 8.Bf3 e6 9.0–0 Bd6 10.Nd2 Ne7 11.c4 c6 12.Rc1 0–0 13.Qb3 Nf5 14.Rfe1 Nh4 15.g3 Nf3=+ 16.Nf3 Ng4 17.h3 Nf6 18.Kg2 Ne4 19.Rcd1 f5 20.Nd2 Ng5 21.cd5 ed5 22.h4 Ne4 23.Ne4 fe4–+ 24.a4 Rf3 25.Re2 Qe7 26.b5 ab5 27.ab5 Raf8 28.bc6 bc6 29.Bc3 g5 30.hg5 Qg5 31.Be1 h5 32.Qb6 h4 33.Qc6 Bg3 34.fg3+– Rg3? 35.Bg3 Qg3 36.Kh1 Qf3 37.Kg1 h3?? 38.Qd5 Rf7?? 39.Qg5 Rg7+= 40.Qg7 Kg7 41.Rdd2 Kh6 42.d5 Qg3 43.Kf1 Qf3? 44.Kg1 Qg3 45.Kh1 Qf3 46.Kh2 Kh5? 47.d6 Kh4 48.Rf2 Qg3 49.Kh1 Qe3 50.d7 Qe1 51.Kh2 e3 52.d8Q Kg4 53.Rd4 Kh5 54.Rf5 Kg6 55.Qg5 Kh7 56.Rd7 Kh8 57.Rf8 1–0. futsalboy (1710) – bacaj (1675), kurnik, 2011.

4.d4 e6 5.a3 Nc6 6.b5 Na5 7.Ne5 Bd6 8.Nf7?? (better is 8.e3=) 8...Kf7–+ 9.e3 Bd7 10.h3 b6 11.a4 Ne4 (11...Rf8 12.Nd2–+) 12.Qh5 Kg8 (12...g6!? 13.Qd1–+) 13.Bd3 Qf6 14.Be4 de4 15.Nd2 g6 (15...Qf7 16.Qf7 Kf7 17.Bc3–/+) 16.Qe2 c6 (16...Qf5!?–/+) 17.Ne4+= Qe7 18.d5 (better is 18.Bc3=) 18...cd5?? (18...ed5 19.Nd6 Qd6 20.Bh8 Kh8 21.0–0–/+) 19.Nd6?? (better is 19.Nf6 Kf8 20.Nd7 Qd7 21.Bh8+–) 19...Qd6+= 20.Bh8 Kh8 21.Rd1? (better is 21.0–0+=) 21...Nc4?? (better is 21...Qb4 22.c3 Qc3 23.Kf1 a6–+) 22.Qc4!!+– Qe5 (22...dc4 23.Rd4 Double attack (23.Rd6 Pinning; 23.Rd6 Deflection; 23.Rd4 Decoy; 23.Rd6 Remove defender)) 23.Qd4 Qd4 24.ed4 (24.Rd4 a6 25.c4 Kg7+–) 24...Rc8 25.Rc1 (better is 25.Ra1!?+–) 25...Rc4 26.0–0 Rd4 (26...Ra4 27.Rfe1 Kg7+/–) 27.c3 (27.Rfd1 Rc4+–) 27...Rc4? (27...Ra4 28.Rfe1+=) 28.f4 (better is 28.Rfd1+–) 28...Ra4+= 29.Ra1 Rc4? (better is 29...Bb5 30.Ra4 Ba4+=) 30.Ra7+– Bb5 31.Re1 Rc3 (better is 31...Rc6+–) 32.Re6 Kg8 (32...Rc1 33.Kf2 Rc2 34.Ke1 Rc8+–) 33.Rg6 Kh8 (33...Kf8 34.Rh6 Kg8 35.f5+–) 34.Rh6 (34.Rb6 Be8 35.Rb8 Re3+–) 34...Kg8 35.Rb6 Be8 36.Rb8 Kf8 37.Ra4 (better is 37.f5 Rc1 38.Kf2 Rc4+–) 37...Kf7 38.Ra7 Kf8 39.f5 d4 40.h4 (better is 40.f6!? Re3+–) 40...d3 41.Ra2 (better is 41.Rd8!? d2 42.Rd2 Rc5+–) 41...Kf7 42.Rd2 Bd7 43.Rb7 Ke8 44.Rd7! Kd7 45.h5 (45.g4!? Ke7 46.g5 Rc4 47.Rd3 Rh4 48.f6 Kf7 49.Rd7 Kf8+–) 45...Ke7 46.g4 Kf6 47.Kf2 Rc2?! (47...Kg5 48.h6! Kg4+–) 48.Ke3 Kg5 (48...Rc4 49.Rg2+– (49.Kd3 Rg4 50.Rh2 Kf5=; 49.Rd3?! Rg4 50.Kf3 Kg5+/–)) 49.Kd3 (better is 49.Rc2 dc2 50.Kd2+–) 49...Rc8 50.f6! Kg4 (50...Kf6 51.Rc2 Combination) 51.h6 (better is 51.Rc2!? Rf8 52.h6 Kf5+–) 51...Kg5 52.f7 (52.Rf2 Kh6 53.Rg2=) 52...Kh6= 53.Rf2 Kg7 54.Ke4 Rf8 55.Ke5 ½–½. stephenmason11 – calchess10, ChessWorld.net, 2014. (=1.Nf3 d5 2.b4 h6 3.Bb2 Nf6)

4.e3 Nbd7 5.Be2 e6 6.0–0 (6.a3!?=) 6...Bb4–/+ 7.c4 0–0 8.cd5 Nd5 9.a3 Bd6 10.Nc3 Nc3 11.Bc3 e5 12.Qc2 Re8 13.Bd3 Nf6 Black plans e4 14.Bc4 e4 15.Nd4 Qe7 (15...a6 16.a4–/+) 16.g3 (better is 16.Nb5!?+=) 16...a6–+ 17.a4 Ng4 18.Rad1 (18.Ne2 Rb8–/+) 18...Qg5 19.h4 Qh5 20.Ne2 Ne5 (better is 20...b5 21.Bb3 Bd7–+) 21.Nf4? (better is 21.Be5 Qe5 22.Nc3–+) 21...Nf3 22.Kg2 Qg4 (better is 22...Bf4 23.ef4 Bg4–+) 23.Bd5?? (better is 23.Rh1 Bf4 24.ef4–+) 23...Nh4 24.Kh2 (24.Kg1 Nf3 25.Kg2 Bf4 26.Rh1–+) 24...Bf4 25.ef4 Qh3 (25...Qh3 26.Kg1 Nf3#; 25...Nf3 26.Kg2 Qh3#) 0–1. Neumann,Frank (1650) – Kapfenstein,Armin (1720), RSS5E NoEngine–29, 2007.

4.e3 e6 5.a3 Bd6 6.c4 dc4 7.Bc4 0–0 (7...c6 8.d4=) 8.0–0 a6 (8...c6 9.d4=) 9.d4+= b5 10.Bd3 Nc6 (10...Bb7 11.Nc3+=) 11.e4 Nd7 (11...Nh5 12.Qc2 Bb7 13.e5+/–) 12.Qc2 Ndb8 (12...Bb7 13.e5 Be7 14.Be4+/–) 13.e5 (13.Re1 Re8+/–) 13...Be7 14.Qe2 Bb7 15.Qe4 f5? (better is 15...g6!?+/–) 16.ef6+– Rf6 17.Qh7 (17...Kf8 18.Bg6 Rg6 19.Qg6+–) 1–0. Woelfelschneider,Peter – Behnke,Denny, KO–001.3, 2002.

4.g3 Bf5 5.Bg2 e6 6.a3 Nbd7 7.0–0 c5 8.bc5 Bc5 9.d3 Qb6 10.Qc1 Rc8 11.h3 Bd6 12.Nbd2 0–0 13.c4 e5 14.Nh4 Bh7 15.Rb1 Qd8 16.Qd1 g5 17.Nhf3 e4 18.Ne1 e3 19.fe3+/– dc4 20.Nc4 Bg3 21.Bd4 b6 22.Nf3 Re8 23.Qb3 Bg6 24.e4 g4 25.hg4 Ng4 26.Bh3 h5 27.e5 Nde5 28.Nce5 Be5 29.Be5 Re5 30.Bg4 hg4 31.Ne5 Qd4 32.Kg2 Qe5 33.Rb2 Rc3 34.Qb4 Rc5 35.Qd2 Rd5 36.Qc1 Rc5 37.Rc2? Be4!–+ 38.Kf2?? g3 39.Ke1 Bd3 40.Qb2 Bc2 (40...Bc2 41.Qe5 Re5–+) 0–1. Shamieh,J (2130) – Mouradian,K (2200), 16th ch–Asian Cities Dubai Cup, Beirut, 2009.

4.e3 Bf5

5.c4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 h6).

5.Be2 e6 6.b5 Be7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7 6.Be2 h6).

3.f4 Qd6

4.e3 Nbd7 5.a3+= a5 6.b5 e5 7.fe5 Ne5 8.Nf3 Bg4?? (better is 8...Nf3 9.Qf3 Bg4+=) 9.Be5+– Bf3 10.Bd6 (10.gf3 Qe5 11.c3 Bd6+=) 10...Bd1 11.Bf8 Rf8 12.Kd1 0–0–0 13.Bd3 Ng4 (13...d4+–) 14.Bf5 (14.Bf5 Kb8 15.Bg4+–) 1–0. cristero (2465) – wstanevans (2330), net–chess.com, 2014. (=1.f4 d5 2.b4 Nf6 3.Bb2 Qd6)

4.g3 Qb4 5.Qc1 Bf5 6.c3 Qb6 7.e3?? (better is 7.Nf3–+) 7...Be4 8.Nf3 Bf3 9.Rg1 Nbd7 10.Bg2 (10.c4–+) 10...Bg2 11.Rg2 Nc5 12.Qc2 Nd3! 13.Ke2 (13.Qd3 Qb2 Deflection) 13...Nb2 14.Qb3 (14.d3 e5! 15.Kf1 Ng4 16.Qb2 Ne3 17.Ke1 Ng2 18.Qg2 ef4 19.gf4 0–0–0–+) 14...Qa6 15.Kf3 e5! 16.Qb2 (16.fe5 Nd3 Decoy) 16...Qf1 17.Rf2 e4 0–1. cervejarj (2105) – flyingtiger, net–chess.com, 2013. (=1.f4 d5 2.b4 Nf6 3.Bb2 Qd6)

4.e3 Qb4

5.Bc3 –/+.

5.Be5 Qa5 –/+.

4.Be5 Qb4

5.Nc3 Qa5 6.e3 Nbd7 7.Nf3 Ng4 8.Nd4 Nge5 9.fe5 e6 10.Qh5 Bb4 11.Nb3 Qb6 12.Nb5 0–0 13.Be2 f6 14.a3 Be7 15.0–0 Ne5 (worse is 15...fe5 16.Rf8 Bf8 17.Rf1+=) 16.a4 c5 17.a5 Qc6 18.Nc3 f5 19.Ra2 d4! 20.Bb5 (20.ed4 cd4 Combination) 20...Qd6 21.Nd1 a6 22.Be2 Bd7 23.ed4 cd4 24.Nb2 Bc6 25.Qh3 Rf6 26.Nc4 Nc4 27.Bc4 Rh6 28.Qg3 Rg6 29.Qd6 Rg2 30.Kh1 Bd6 31.Be6 Kh8 32.Nd4 Rh2 33.Kg1 Rg2 34.Kh1 Re8 35.Nc6 Rh2 36.Kg1 Re6 37.Ne7 Re7 38.Raa1 Ree2 39.Rf5 Reg2 40.Kf1 Rd2 (40...Rd2 41.Kg1 g6–+) 0–1. Wlasow,Andrey (1920) – Bonehill (2270), OP–2009–0–00839, 2009.

5.Nc3 c6 6.e3 Nbd7 7.Bc7 Qa3 8.Nf3 Ng4 9.Bd3 Nc5 10.0–0 Ne3! 11.de3 Qc3 12.Be5 Qa3 13.Qd2 Bg4 14.Bd4 f6 15.Rab1 0–0–0 16.Rb3? Nb3 17.ab3 Bf3 18.gf3 a6 19.Ra1 Qd6 20.Qa5 e6 21.Bb6 Rd7 22.Ra4 g5 23.f5 e5 24.b4 Rg7 25.b5 cb5 26.Bb5 ab5 27.Qb5 Qc6 28.Ra8 Kd7 29.Rd8 Ke7 30.Qa5 g4 31.f4 g3 32.h3 ef4 33.ef4 Kf7 34.Bd4 Bc5! (34...Bc5 35.Rd7 Qd7 36.Qc5 Re8–+; 34...Qc2?? 35.Qd5 Ke7 36.Qd7) 0–1. Ibanez,Thomas – Calvo,Ricardo (2190), Tournoi Accession, 2009.

5.Nc3 Nbd7 6.Rb1 Qc4 7.e3 Qc5 8.Bd4 Qa5 9.Rb5 Qa3 10.Rb3 Qa5 11.Rb5 Qa3 12.Rb3 Qa5 13.Rb5 ½–½. b4_player – ksew, casual, 2013.

5.Nc3 Nbd7 6.Rb1 Qc5 7.Rb5 Qc6 8.Nf3 Ne5 9.fe5 a6 10.e3 Ne4 (10...ab5 11.Bb5 Nd7 12.Bc6 bc6 13.e6 fe6 14.Nd4+–) 11.Rd5 (11.Rb3!?–/+) 11...Nc3–+ 12.dc3 Bf5 (12...Be6 13.Rd3 Ba2 14.Nd4–+) 13.Qd2 e6 14.Rd4 Bc5 15.Rc4 b5 (15...Rd8 16.Bd3–+) 16.Rf4–/+ Rd8 17.Bd3 0–0 18.Nd4 Qd5 19.0–0 Bg6 20.R4f3 Rd7 (20...Bd4?! 21.cd4 Bd3 22.cd3=; 20...Qa2?! 21.Qf2–/+) 21.Bg6 hg6 22.Rh3 Qe5 23.Qe1 g5 0–1. pierred (2755) – flyingtiger, net–chess.com, 2013.

5.Nc3 Nbd7 6.Rb1 Qc5 7.Rb5 Qc6 8.Nf3 Ne5 9.Ne5 Qd6 10.e3 c6 11.Rb3 g6 12.Be2 Bg7 13.0–0 d4 14.Nb1 de3 15.Bc4 Nd5 16.Nc3 Be5 17.fe5 Qc5 18.Qe2 ed2 (19.Rf2 Nc3 20.Rc3 Be6 21.Be6 Qc3 22.Bf7 Kd8 23.Qd2 Qd2 24.Rd2 Kc7–+) 0–1. SWAT_TEAM – Harismuha, ChessWorld.net, 2004.

5.Nc3 Nbd7 6.Bc7? d4 7.Rb1 Qc5 –+.

5.Bc7 Bf5 6.Nc3+= Qc5 7.Bb8 Rb8 8.e3 a6 9.Nf3 e6 10.Nd4 Bg4 11.Qc1 h6 12.Rb1 Qc7 13.Qb2 Bc5 14.Nb3 0–0 15.Nc5 Qc5 16.Na4 Qc7 17.Nb6 Rbd8 18.Bd3 Ne4 19.c4 Nc5 20.Bf1? (20.Bc2 d4+=) 20...dc4 (better is 20...Bf5 21.cd5 Bb1 22.Qb1 ed5–+) 21.Nc4+= (21.Bc4? Bf5 22.0–0 Bb1 23.Rb1 Na4 24.Na4 Qc4–+) 21...Bf5 22.Rc1 Qd6?? (better is 22...Rc8 23.Qa3 Qd8–/+) 23.Nd6+– (23.Nd6 Rd6 24.Rc5+–) 1–0. Durst,Peter (1890) – Benko,Jozef, SVK–ch Region, 2006.

5.Bc7 Ng4!? 6.Be5 f6 –+.

5.e3 Nc6 6.Nc3 Ne5 7.fe5 Ne4 8.Nd5 Qa5 –/+.

4.Be5 Qb6

5.a4 Ng4 6.e3 Ne5 7.Bb5 c6 8.fe5 cb5 9.d4 ba4 10.Ra4 Bd7 11.b5 Bb5 12.Ra2 Bc4 13.Ra4 Qc6 14.Nc3 Bb3 15.cb3 Qc3 16.Kf2 b5 17.Ra2 h6 18.Ne2 Qc6 19.h4 a6 20.Qf1 f6 21.Kg1 fe5 22.Qf3 e4 23.Qf5 a5 24.h5 Nd7 25.g3 e6 26.Qg6 Kd8 27.g4 a4 28.Qf7 Rc8 29.g5 Rc7 30.gh6 gh6 31.ba4 ba4 32.Ng3 Bd6 33.Ne2 Rf8 34.Qe6 Bh2 35.Rh2 Qe6 36.Ra4 Qf6 37.Ng3 Rc1 38.Kg2 Qf3 39.Kh3 Ke7 40.Ra7 Rg1 41.Rd7 Kd7 42.Rg2 Qg2 43.Kh4 Qg3# 0–1. Chad's Chess V015 – Ozwald043, computer chess game, 2001.

5.e3+= Nbd7 6.Bc3 +=.

5.e3+= Bg4 6.Nf3 (6.Be2 Be2 7.Ne2 Nbd7=) 6...Nbd7 7.Nc3 e6 8.Bd4 Qd6 (8...c5 9.bc5 Bc5 10.Na4+=) 9.Nb5+= Qc6 10.Na7 Ra7 (better is 10...Qd6!? 11.Nb5 Qc6+=) 11.b5+– Qd6 12.Ba7 b6 13.a4 Ne4 14.a5 Be7 15.Be2 Bf6 16.c3 0–0 17.Nd4 Be2 18.Qe2 e5 (18...Bd4 19.cd4 Qb4 20.ab6 cb6 21.0–0+/–) 19.Nc6 (better is 19.fe5!? Ne5 20.0–0+–) 19...ef4+/– 20.0–0 fe3 21.Qe3 Bg5 22.Qd4 Bd2 (22...Ndc5 23.ab6 Nb3 24.Qb4 Na1 25.Ra1 cb6 26.Bb6+/–) 23.ab6 (23.Rad1!? Bc3 24.Qd5 Qd5 25.Rd5+/–) 23...Bc3+= 24.Qd5 Ba1 25.Qe4 Nf6 (better is 25...Qc5!? 26.Kh1 cb6 27.Ra1 Qb5+–) 26.Qc4 Re8? (26...cb6 27.Ra1 Ra8+–) 27.b7 1–0. Reti,Richard – Speyer,Abraham, Scheveningen, 1923.

3.f4 e6

4.b5 Bc5 5.Nf3 0–0 6.e3 Bd7 7.Nc3 c6 8.a4 Qc7 9.Ne5 d4 10.ed4 Bd4 11.Qe2 a6 12.ba6 Na6 13.Nd1 =+.

4.b5 c6 5.e3 cb5 6.Bb5 Bd7 7.Be2 Be7 8.c4 0–0 9.Nf3 Qb6 10.Qb3 Qc7 11.0–0 a6 12.Ne5 dc4 13.Qc4 Bc6 14.Nc6 Nc6 15.Rc1 Rac8 16.Qc2 Rfd8 17.d4 Nd5 18.Qe4 Qb6 19.Bc3 Rc7 20.Bd3 Nf6 21.Qf3 Rdc8 22.a3 Na5 23.Bc2 Rc3?? 24.Nc3–/+ Rc3 25.Bh7! Nh7 26.Rc3 Qb2 27.Rc8 Nf8 28.Qd1 Nc6 29.Kh1 Ba3 30.Rb1 Qc3? 31.Rb7+– Qe3 32.Rc6 Qf4 33.Ra6 Bd6 34.Qg1 Ng6 35.d5 ed5 36.Rd7 Be5 37.Rd5 Qc4 38.Ra8 Kh7 39.Qd1 Bf4 40.Ra7 f6 41.Rdd7 Bh6 42.h3 Nf4 43.Qb1 Ng6 44.Rac7 Qf4 45.Qd3 Qg5 46.g4 Qh4 47.Kg2 Qg5 48.Kf2 Qh4 49.Kg1 Qe1= 50.Kg2 Qa1?? 51.Re7 Qb2 52.Rc2 Qb6 53.h4 Bf4 54.h5 f5 55.Qf5 Qb3 56.Qg6 1–0. Bonetti,Shane – hangin (1795), ICC, 2002.

4.b5 Bd6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.f4).

4.b5 Bd7 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.f4).

4.a3

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.f4).

4.a3 Bd6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Bd6 5.f4).

4.b5 a6

5.a4 Bd7 6.e3 c5 7.c4 Be7 8.Nf3 dc4 9.Bc4 Qb6 10.Nc3 0–0 11.0–0 Ne8 12.Rb1 (12.a5!? Qd8 13.b6+=) 12...Nd6= 13.Be2 Bf6 (13...ab5 14.Nb5 Bb5 15.ab5=) 14.Ne5 Qc7 15.Nc4 ab5 (better is 15...Nc4!? 16.Bc4 ab5 17.Nb5 Bb5 18.Bb5 Bb2 19.Rb2 Nd7=) 16.Nd6+/– Qd6 17.Ne4 (17.Bb5?! Bc6=; worse is 17.ab5 Be7+=; 17.Nb5?! Bb5 18.Bb5 Bb2 19.Rb2 Nd7=) 17...Qe7 18.Nf6 gf6 19.Bd3 f5 20.Qf3 f6 21.ab5 (21.Bb5?! Bc6 22.Qg3 Kh8+=) 21...Be8 22.e4 (22.Bc4 Ra4 23.d3 b6+–) 22...fe4 (22...c4!? 23.Bc2 Bb5 24.ef5 Bc6+/–) 23.Be4 Ra4 24.Bc3 1–0. Chirpii,Alexandru (2115) – Anghel,Dumitru, Centrocoop op, 2000. (=1.f4 d5 2.b4 Nf6 3.Bb2 e6 4.b5 a6)

5.e3 Bc5 6.Nf3 =+.

5.e3 Be7 6.Nf3 =+.

5.e3 ab5

6.Bb5 c6 7.Be2 Bc5 8.Nf3 =+.

6.Bb5 c6 7.Be2 Be7 8.Nf3 0–0 9.0–0 c5 10.c4 Nc6 11.Qc1 d4 12.Ne5= Qd6 13.Nc6 bc6 14.Na3 e5 15.Nc2 Re8 16.fe5 Qe5 17.Ne1 Bd6 18.Nf3 Qh5 19.Bd3 Ng4 20.h3 Ne5 21.Ne5 Qe5=+ 22.Rf3 Qh2 23.Kf2 de3 24.de3= Be7 25.Qg1 Bh4 26.Ke2 Qg1–/+ (27.Rg1 Ra2–/+) 0–1. Benassi,Aspasio – Azamat Ulfatovich,Gilimshin, EM/J50/P150, 2001.

6.Bb5 Bd7 7.Bd7 Nbd7 8.Nf3 c5 9.0–0 Be7 10.d3 0–0 11.Nbd2 b5 12.c4 bc4 13.dc4 Nb6 14.Ne5 Qe8 15.Qc2 Na4 16.Ba3 Nd7 17.Nd7 Qd7 18.cd5 ed5 19.e4 d4 20.Nc4 d3 21.Qf2 Qe6 22.Nd2 Rfc8 23.Rfc1 Bd8 24.Rc4 Nb6 25.Rc3 c4 26.f5 Qe5 27.Rac1 Ra3! 28.Ra3 Be7 29.Nf3 Qf4 30.Rac3 Bc5 (31.Nd4 Qe4 32.Rc4 Nc4 33.Rc4 Rb8–+) 0–1. Wetterling,Detlev – Garavito,Miguel Angel, Capablanca Memorial, 1998.

6.Bb5 Bd7 7.Be2 Bc5 8.Nc3 =+.

6.Bb5 Bd7 7.Be2 Bd6 8.Nf3= 0–0 9.0–0 c5 10.Ne5 Qb6 11.Qc1 Rc8 12.a3 Be7 13.d3 Nc6 14.Bf3 c4=+ 15.dc4 Bc5 16.Re1= Ne5 17.Be5 Ne4 18.cd5 ed5 19.Nc3 Bc6 20.Bg4 Rd8 21.Ne4 de4 22.c3 Bb5 23.Bd4 Qd6 24.Qb1 Bd3= 25.Bc5 Qc5 26.Qb4 Qc6 ½–½. aspasio – demiurg, ICC, 1999.

3.f4 Bf5

4.e3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 e6 4.f4 Nf6).

4.Nf3 Qd6 5.Be5 Qb4 6.Nc3 Qa5 7.e3 (7.Rb1!? Ne4 8.Rb7 Nc3 9.Bc3 Qa2 10.Nd4=) 7...Nbd7+= 8.Nb5 (better is 8.Rb1!?+=) 8...Ne5–/+ 9.Ne5 c6 10.Nd4 Bc8 11.c4 g6 12.cd5 Nd5 13.Bc4? (13.Qc1 Bd7+=) 13...e6 (13...f6!? 14.Bd5 fe5 15.Bc6 bc6 16.Nc6 Qa6 17.Ne5 Bb7–+) 14.0–0–/+ Bg7 15.Bd5 Qd5 16.Qf3 0–0 17.Qd5 ed5 18.Rab1 Re8 19.Nef3 Re7 20.h3 (20.Rfc1!?–/+) 20...c5–+ 21.Ne2 Bf5 22.Rb3 b5! 23.Ng3 (23.Rb5 Bd3 Double attack (23...Bd3 Decoy)) 23...Bc2 (better is 23...Bd7–+) 24.Rb5+= Bd3 25.Rc5 Bf1 26.Kf1 Rd8 27.Ne2 Bf8 28.Rb5 Rc7 29.Ned4 Bc5 30.Ke2 Bb6 31.a4 Rc5 32.Rc5 Bc5 33.Nc6 Rd6 34.Nfd4 Bd4 35.Nd4 Ra6 36.a5 Ra5 37.Nc6 Ra1 38.Ne7 Kf8 39.Nd5 a5 40.Kf3 a4–+ 41.Nc3 a3 42.Ke4 Rg1 43.g4 Rh1 44.g5 Rh3 45.Kd3 Ke7 46.Kc2 Rh2 47.Kc1 f6 48.Nd5 Ke6 49.Nf6 Rh1 50.Kc2 a2 51.Nh7 a1Q (51...a1Q 52.Kd3 Qb1 53.Kd4 Qb4 54.Kd3 Rh2 55.f5 Kd6 56.Kc2 Rd2 57.Kc1 Qb2 mate) 0–1. Gonzalez Berrendero,C (1740) – Rodriguez Orgaz,C, San Sebastian de los Reyes ESP, 2012.

4.Nf3 Nbd7 5.Nc3 e6 6.b5 Bb4 7.e3 0–0 8.Be2 c6 9.0–0 Bc3 10.Bc3 Ne4 11.Bb2 c5 12.d3 Nd6 13.a4 a6 14.c4 ab5 15.ab5 dc4 16.Ra8 Qa8 17.dc4 Qb8 18.Nd2 Rd8 19.Qb3 Ne4 20.Ne4 Be4 21.Rd1 Nf6 22.Be5 Rd1 23.Qd1 Qe8 24.Qd6 Nd7 25.Bc3 b6 26.Bg4 Bg6 (26...Kh8!?+=) 27.Bf3+/– Nf8? (better is 27...Qc8+/–) 28.Qb6+– Qd7 (28...Qe7 29.Be5 Qd7 30.Qb8+–) 29.Qc5 Qd3 (29...h6+–) 30.Bb4 Qb1 31.Kf2 Qc2 32.Kg3 h5 33.Qf8 Kh7 34.h4 Qc4 35.b6 Be4 36.Qc5 Qd3 37.Qd4 Qd4 38.ed4 Bf3 39.gf3 (39.gf3 e5 40.fe5+–) 1–0. Fritz 11 – hiallday, 2013.

4.Nf3 e6

5.a3 c5 6.e3 Nbd7 (6...cb4 7.Bb5 Nc6 8.0–0+=) 7.bc5+= Bc5 (worse is 7...Nc5 8.Bb5 Ncd7 9.Nc3=) 8.Be2 Rc8 (8...Qb6!? 9.Ra2 0–0+=) 9.Nc3= 0–0 10.0–0 Nb6 11.Rb1 Qe7 12.Bd3 Ne4 13.Qe2 Rfd8 14.Nd4 Bd4 (worse is 14...Ba3 15.Be4 (worse is 15.Nf5 ef5 16.Ba3 Qa3+=) 15...Bb2 16.Nf5 (worse is 16.Rb2 Be4 17.Ra1 Ra8=) 16...ef5 17.Bf5 Bc3 18.Bc8 Rc8 19.dc3+=) 15.ed4 Nd6 16.Ba1 Bd3 17.cd3 Qd7 18.Rb4 Rc7 19.a4 Nbc8 20.Qf2 Ne7 21.Nb5 Nb5 22.ab5 Nf5 23.b6 ab6 24.Rb6 Rc6 25.Rc6 Qc6 26.Bc3 h5 27.Qe2 h4 28.Kf2 Ra8 29.g4 hg3 30.hg3 Qb6 Attacks the isolani on d4 (30...Ra2 31.Rb1+=) 31.Rh1= Nh6 (31...Nd4? 32.Qh5 Nf5 33.Kf3+–) 32.Qh5 Qb5 33.Qg5 Kf8 (33...Qd3? 34.Rh6 f6 35.Qg4+–) 34.g4 Re8 (34...Qd3? 35.Rh6 Kg8 36.Rh2+–) 35.Qh5 Qb6 36.Kg2 Rd8 37.Qh4 f6 38.Qh5 Qd6 39.Kg3 b5 40.Rb1+= Kg8 41.Qg6 Nf7 42.Bb4 Qc7 43.Bc5 Nh8= 44.Qh5 g6 45.Qh6+= Rb8 46.g5 fg5 47.Qg5 Qg7 48.Kf3 Qh7 49.Rg1 Qh3 50.Ke2 Re8 51.Bd6 Qh2 52.Kd1 Kf7 53.Kc2 Qh5 54.Kb3 Qg5 55.fg5 Kg8 56.Be5 Nf7 57.Bf6 Nd6 58.Ra1 Nf5 59.Ra6 Kf8 60.Rb6 Nh4 61.Kb4 Nf5 62.Kb5 Kf7 63.Rb7 Kf8 64.Kb4 Ra8 65.Kb3 Ra1 66.Rh7 Rb1 67.Kc2 Ra1 68.Rh8 Kf7 69.Kb2 Rd1 70.Kc3 Rc1 71.Kb4 Rb1 72.Kc5 Rc1 73.Kb5 Rf1 74.Rh7 Kg8 75.Rh3 Rf2 76.Kc6 Rd2 77.Kd7 Kf7 78.Be5 Rg2 79.Rh7 Kg8 80.Rh8 Kf7 81.Rh7 Kg8 82.Rh8 Kf7 83.Rh7 ½–½. marekt (2105) – condoru (2065), gameknot.com, 2014.

5.b5 c5 6.e3 Be7 7.c4 (7.Be2 0–0=+) 7...0–0–/+ 8.Be2 Nbd7 (8...dc4 9.Na3–/+) 9.d3 dc4 10.dc4 Nb6 (10...Qa5 11.Bc3 Qb6 12.0–0=+) 11.Qd8 (11.Qb3 Ne4=+) 11...Rad8 12.Nc3 Bd3 13.Bd3 Rd3 14.Ke2 Rfd8 15.Rhd1=+ Rd1 16.Rd1 Rd1 17.Nd1 Nc4 18.Bc1 Nd6 19.a4 Nde4 20.Ne5 Bd6 21.Nc4 Bc7 22.Bb2 Nd7 23.Kf3 Nd6 24.Nd6 Bd6 25.Nc3 Nb6 26.e4 e5 27.f5 f6 28.Ke2 Kf7 29.Ba3 Ke7 30.g4 c4 31.Bd6 Kd6 32.a5 Nd7 33.Kd2 Kc5–+ 34.h4 Kd4 35.g5 Nc5 36.h5 fg5 37.b6 ab6 38.ab6 h6 (39.Nb5 Ke4 40.Nd6 Kd4–+; 38...Ne4 39.Ne4 h6 40.Ng5+/–) 0–1. Rush,Bradley – Wortham,Alan Kirt, IECG 7PSRR, 1995.

5.b5 Bc5 6.e3 Nbd7 (6...0–0 7.Be2=+) 7.Bd3 (7.Be2 a6=) 7...Bd3 8.cd3 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Qa8 (11...0–0 12.0–0=+) 12.Bf6 Nf6 13.d4 Bb4 14.0–0 Qa5 15.Qc2 0–0 16.Nc3 Rc8 17.Qb2 Bc3 18.dc3 Ne4 19.Rc1 Nd6 20.Rb1 Nc4 21.Qc1 Qa2 22.Ra1 Qe2 23.Qe1 Qe3 24.Qe3 Ne3 25.Ra7 b6 26.Ne5 Kf8 27.Ra1 f6 28.Nc6 Nf5 29.Kf2 Nd6 30.Na7? Ra8–+ 31.Ra3 Nc8 0–1. Solano,Agustin (2015) – Charpentier,William (2195), CRA–ch Costa Rica, 1997.

5.b5 Bd6 6.e3 =+.

3.Bf6 ef6

4.a3 a5 5.b5 c6 (5...Bd6 6.e3=+) 6.e3 Bd6 7.c4 dc4 8.bc6 (8.Bc4 cb5 9.Bb5 Nc6=) 8...Nc6 (8...b5 9.Nc3 Ba6 10.Qf3=+) 9.Bc4 Ne5 (9...0–0=+) 10.Bb3 (10.Bb5 Bd7 11.Bd7 Qd7=+) 10...0–0 (better is 10...Nd3!? 11.Kf1 0–0–/+) 11.d4=+ Ng6 (11...Ng4 12.Nf3=+) 12.Ne2 (12.Nc3 a4 13.Ba4 Be6=) 12...Be6 (12...a4 13.Ba4 Bg4 14.Bc2=) 13.d5 (13.0–0 Qd7=) 13...Bf5 (better is 13...Bg4=+) 14.e4? (better is 14.Bc2 Bg4 15.Nbc3=+) 14...Be4–+ 15.f3 (15.0–0 Nh4 16.f3 Bg6–+) 15...Bf5 (15...Bb1 16.Qb1 Re8 17.Ba4–+) 16.Nd2 (16.Bc2 Bc2 17.Qc2 Rc8–+) 16...b5 (better is 16...Be5 17.Ra2 a4 18.Ba4 Qd5–+) 17.Nd4? (better is 17.Bc2 Bc2 18.Qc2–+) 17...Re8 18.Ne4 Be4 19.fe4 (19.Kf1 a4 20.Ba2 Ba3 21.fe4 Re4–+) 19...Re4 20.Kf1 Qb6 (21.Nf3 Ne5–+; 20...Be5 21.Nf3 Ba1 22.Qa1–+) 0–1. 1805DYDIDIDY – dobbelst, mySchach.de, 2005.

4.a3 a6 5.d4 b6 (5...c6 6.Nf3=+) 6.e3= c5 7.bc5 bc5 8.c3 Qa5 (8...Nc6 9.dc5 Bc5 10.Nf3=) 9.Nf3 Bb7 (9...Nc6 10.dc5 Qc5 11.Nd4=) 10.Be2 (10.Bd3 Nd7=) 10...Nc6 11.0–0 Be7 12.Qc2 c4 13.Nbd2 0–0 (13...Ba3? 14.Nb1+–) 14.e4 Nd8 (better is 14...Qc7!?+=) 15.ed5+/– Bd5 16.Bc4 Bc4 17.Nc4 Qd5? (better is 17...Qc7 18.Ne3 Re8+–) 18.Nb6 (18...Qb7 19.Na8+–) 1–0. Clyde Barrow (1685) – Istvanny, internet, 2007.

4.a3 Be6 5.d4 Bd6 6.Nd2 0–0 7.Ngf3 c6 (7...a5 8.c3+=) 8.e3= a5 9.b5 Qe7 10.Qc1 a4 (10...Rc8 11.Qb2+=) 11.Be2 cb5 12.Bb5 Ra5 13.Bd3 Nc6 14.c3 Na7 15.Qb2 Rc8 16.0–0 b5 17.Rfc1 Nc6 18.Nf1 (18.Bb5? Rb8 19.c4 dc4 20.Nc4 Rab5–+) 18...Nd8 19.Qe2 (better is 19.Ng3!?=) 19...Ba3–/+ 20.Rcb1 b4 21.cb4 Bb4 22.Ng3 Nc6 23.Nh4 Bc3 (better is 23...g6 24.Rc1 a3–/+) 24.Ngf5? (24.Bh7 Kh7 25.Qd3 f5 26.Nhf5 Nb4 27.Qc3 Rc3 28.Ne7 Nd3=) 24...Bf5?? (better is 24...Qf8–+) 25.Nf5+= Qe6?? (25...Qf8 26.Qg4 g6 27.Nd6–/+) 26.Ra3?? (better is 26.Qg4 g6 27.Nh6 Kg7 28.Bf5+–) 26...Ne7?? (better is 26...Bb4 27.Raa1 g6–/+) 27.Ne7+– Qe7 28.Rc3! Rc3 (28...Rc3 29.Rb8 Decoy) 29.Rb8 (29.Rb8 Qf8 30.Rf8 Kf8 31.Qd2 Rd3 32.Qb4 Ke8 33.Kf1+–) 1–0. Vermaas,Fred – Verhaeren,Gertjan, IECG, 2004.

4.b5 c5 5.a4 (5.bc6 Nc6 6.e3 Bd6=+) 5...Be6 (5...Bd6 6.e3=+) 6.e3 Bd6 7.g3 (7.Nf3 0–0=+) 7...Nd7 (7...0–0 8.Ne2=+) 8.Bg2 a5 (8...Be5 9.c3=+) 9.Ne2 0–0 10.c4 (10.0–0 Re8=+) 10...Nb6 11.cd5 Nd5 (11...Bd5 12.Bd5 Nd5 13.Nbc3=+) 12.0–0 (12.Nbc3 Nc3 13.Nc3 Qd7=) 12...Rb8 (12...Qe7 13.Nbc3 Nb4 14.d4=+) 13.Nbc3 Be7 (13...Nc3 14.dc3 Qe7 15.Nf4=) 14.e4 (14.Nd5 Bd5 15.Bd5 Qd5=) 14...Nc3 (14...Nb4 15.d4=+) 15.Nc3 (15.dc3 Bd6=) 15...b6 (15...Re8 16.Rc1=+) 16.Qc2 (16.Rc1 Rc8=) 16...c4 (16...Re8 17.Nd5=) 17.Rad1 (17.f4 Qd3 18.Rfc1 Bc5 19.Kh1 f5=+) 17...Qd3 (17...Qd4 18.Nd5 Rfe8 19.d3 Bd5 20.ed5=+) 18.Qd3 cd3 19.Rfe1 Bc4 20.Bf1 Bc5 21.Nd5 Rbd8–/+ 22.Nf4 Bb4 23.Re3=+ Bb3 24.Rb1 Ba4 25.Rd3 Rd3?? 26.Bd3= Bd2 27.Nd5+= Rb8 28.Rb2 Bc1= 29.Rb1 Bd2 30.Rb2 Bc1= 31.Rb1 Bd2 ½–½. mic (2180) – alaamattar (2270), net–chess.com, 2007.

4.b5 Bc5 5.e3 c6 6.d4 Bd6 7.Nc3 0–0 8.bc6 (8.Bd3 a6 9.bc6 Qa5–/+ (worse is 9...bc6 10.Qd2=)) 8...bc6 (better is 8...Qa5!? 9.Qd2 Bb4–/+) 9.Bd3–/+ Be6 10.Qh5 (10.Nge2!?+=) 10...g6–/+ 11.Qd1 Nd7 12.Nf3?? (12.Nge2 Rb8–/+) 12...Rb8 (better is 12...Bb4 13.0–0 Bc3 14.Rb1–+) 13.Rb1? (13.0–0 Qa5 14.Ne2 c5 15.dc5 Nc5–/+) 13...Rb1 (better is 13...Qa5 14.Qd2 Qc3 15.Qc3 Rb1 16.Ke2 Rh1 17.Qc6 Bb4–+ (17...Bh2?! 18.Nh2 Rh2 19.Kf3–+)) 14.Qb1 Qc7 (14...Qa5!? 15.Qa1–+) 15.0–0 f5 16.Ng5? (16.Qa1 Rb8–/+) 16...Nf6 (16...Bh2!? 17.Kh1 Bd6 18.Ne6 fe6 19.Kg1–+) 17.Ne6 Bh2 18.Kh1 fe6 19.g3 Bg3! 20.fg3 Qg3 21.Qe1 Qh3 22.Kg1 Ng4 23.Qe2 Ne3 (23...Qg3 24.Kh1–/+) 24.Rf3 Qg4 Black prepares the advance f4 25.Kh1 (better is 25.Kh2!? Qh4 26.Rh3 Ng4 27.Kg2–+) 25...f4 26.Nd1 Nd1 (26...Nf5 27.Bf5 Rf5–+ (27...ef5?! 28.Nf2 Qh4 29.Kg2=; 27...gf5?! 28.Nf2 Qh5 29.Nh3=; 27...Qf5?! 28.Nf2–/+)) 27.Qd1–/+ g5 28.Qe2 Rf6 29.Qg2 Qg2 30.Kg2 h5 31.Rh3 Rh6 32.a4? (better is 32.Bf1+=) 32...g4–+ 33.Rh1 h4 34.Ba6 (34.Kf2 Kf7–+) 34...h3 35.Kf2?? (35.Kg1–+) 35...g3 (35...g3 36.Kf3 g2–+) 0–1. smoothoperator (2255) – mbarker (2410), net–chess.com, 2015.

4.b5 Qd6 5.b6 (5.e3 Be7=+) 5...Qb4 (better is 5...Qb6 6.e3 Bb4–/+) 6.c3?? (better is 6.bc7 Na6 7.e3 Nc7 8.Nc3=) 6...Qb2–+ (6...Qb6?! 7.Qb3–+) 7.Qa4 (7.Na3 Ba3 8.Rb1 Qa2 9.bc7–+) 7...Bd7 (better is 7...c6 8.e4 Qa1–+) 8.Qf4 (8.bc7 Na6 9.Qb3 Qa1 10.Qb7–+) 8...Qa1 (8...Qc1) 9.d3 (9.Qe3 Be6 10.Qd3 ab6 11.Nf3–+) 9...Qb1 10.Qc1 Qc1# 0–1. roro – raus, net–chess.com, 2000.

4.b5 Bd6 5.e3 =+.

4.b5 Bg4 =+.

4.c3 a5 5.b5 g6 6.d4 Bg7 (6...Bd6 7.e3= (7.Nf3 0–0 8.e3 Be6 9.Nbd2 c5 10.Be2 Nd7 11.0–0 Qc7) 7...0–0 8.Nf3 c6 9.c4 Bb4 10.Nbd2 cb5 11.cb5 Bf5; 6...c6 7.Nf3 cb5 8.e3 b4 9.c4 dc4 10.Bc4 Bd6 11.Nbd2 Qe7) 7.e3 (7.Nf3 0–0 8.e3 f5 9.c4 Nd7 10.Nc3 Nb6 11.c5 Nc4) 7...f5 (7...0–0 8.Nf3 c6 9.c4 cb5 10.cb5 Nd7 11.Nbd2 Nb6) 8.Bd3 (8.c4 Nd7 9.Nc3 Nf6 10.Nh3 0–0 11.Nf4 Re8) 8...0–0 9.Ne2 Nd7 (9...Qd6 10.Nd2 Nd7 11.Nf4 Nb6) 10.0–0 (10.Nd2 Nf6 11.Nf4 Bh6) 10...Nf6 11.a4 (11.c4 Be6) 11...h5 (11...Qd6 12.Nd2+=) 12.c4+/– c6 (12...Be6 13.Nd2+/–) 13.Nbc3 Be6 14.bc6 (14.c5!?+/–) 14...bc6 (14...dc4 15.cb7 Rb8 16.Bc2+=) 15.cd5+/– ½–½. Kalod,R (2470) – Vavra,P1 (2415), ch–CZE, Ostrava CZE, 2002.

4.c3 Nc6 5.e3 Bf5 6.Bb5 Bd6 7.Bc6 bc6 8.Qa4 Bd7 9.Qb3 0–0 10.Nf3 Re8 11.0–0 Be6 12.Qc2 Qd7 13.d4 a6 14.Nbd2 Bg4 15.h3 Bh3 (15...Bf5!? 16.Qa4 a5 17.ba5 Reb8=) 16.gh3+= Qh3 17.c4 Re4?? (17...Re6 18.Rfe1 f5–+) 18.Ne4+– Qf3 19.Nd6 (better is 19.cd5 cd5 20.Ng3 Bg3 21.fg3 Qg3 22.Qg2 Qe3 23.Qf2 Qg5 24.Kh1+/–) 19...cd6?? (better is 19...Qg4 20.Kh2 Qh4 21.Kg2 Qg4 22.Kh1 Qh5 23.Kg1 Qg4 24.Kh2 Qh4 25.Kg1 Qg5 26.Kh2 Qh4=) 20.Qd1 Qh3 21.f3?? Re8?? 22.Qe2 g6? 23.Rae1 f5? 24.Qg2 Qh5? 25.cd5 cd5 26.a4 Qh4 27.b5 ab5 28.ab5 Kg7 29.b6 Rb8 30.Rb1 h6 31.b7 Qf6 32.Rfc1 h5 33.Rc8 Rb7 1–0. Fists of Steel – pieeater, ChessWorld.net, 2012.

4.Nf3 Bb4 5.c3 Bc5 6.Qb3 0–0 7.e3 c6 8.d4 Bd6 9.c4 dc4 10.Bc4 Nd7 11.Qc2 Nb6 12.Bd3 Nd5 13.Bh7 Kh8 14.Be4 Nb4 15.Qb2 f5 16.Bc2 Qa5 17.0–0 Nc2 18.Qc2 Qd5 19.Nc3 Qe6 20.Ng5 Qh6 21.Nh3 f4 22.ef4? (Better is 22.Nf4 g5 23.Nh3=) 22...Bh3–+ 23.gh3 Qh3 24.Ne2 f5 (24...Rfe8 25.Ng3–+) 25.Kh1 Rae8 26.Ng3 Bf4 27.Qd3 g6 28.d5 cd5 29.Qd5 b6 0–1. pinecrest1981 – Bennyhill, Live Game Caissa's Web, 2004.

4.a3 c5

5.bc5 Bc5 6.Nf3 Nc6 7.d4 Qa5 8.c3 Bd6 9.e3 0–0 10.Bd3 Bg4 11.h3 Bh5 12.0–0 Rac8 13.Ra2 Ne7 14.Rb2 Qc7 15.g4 Bg6 16.Nh4 b6 17.Ng6 fg6 18.a4 f5 19.f4 fg4 20.hg4 Qd7 21.Re1 Qe6 22.Ra2 g5 23.f5 Qh6 24.a5 ba5 25.Ra5 Qh2 0–1. Delfi 1.40 – Green Light Chess v2.15c, computer chess game, 2001.

5.bc5= d4 6.e3 Bc5 7.Qh5 Qb6 =.

5.bc5= d4 6.e4 Bc5 7.Bb5 Nc6 8.Nf3 =+.

5.bc5= d4 6.e4 f5 7.d3 (7.Bb5!? Nc6 8.Qe2 fe4 9.Qe4 Qe7 10.Qe7 Be7 11.Nf3 Bc5 12.c3=) 7...Bc5–/+ 8.f4 (8.Nf3 0–0–/+) 8...Nc6 9.Nf3 0–0 10.Be2 fe4 (10...Re8 11.Nbd2–/+) 11.de4 Qf6 12.Nbd2 (better is 12.Qd2!?–/+) 12...Qf4–+ 13.Bd3 Qe3 14.Qe2 Be6 15.Qe3 (15.e5 Bg4 16.Ne4 Bb6–+) 15...de3 16.Nf1 Rad8 (16...Rfe8 17.h3–+) 17.Ke2 (17.h3 Nd4–+) 17...f5 18.Ng5 fe4 19.Be4 Rf2 20.Ke1 Bc4 21.Nf3 Re2# 0–1. Vermaas,Fred – Bertel,Michael (1765), TE.2004.P.01714, 2004.

4.a3 Nc6

5.c4? dc4 6.Nc3 –/+.

5.c4? d4 6.c5 a6 7.g3 (7.e3 Be7+=) 7...b5 (7...a5!? 8.Qa4 Qd5–+) 8.Bg2 Bb7 9.d3 (9.e3 de3 10.fe3 f5=) 9...f5 (better is 9...a5!? 10.ba5 Bc5–+) 10.Nd2+= Qf6 11.Nb3 Be7 12.Nf3 Rb8 13.0–0 0–0 14.Qd2 h6 (14...Rfd8 15.e3 Qh6 16.Rad1 (worse is 16.Nfd4 Nd4 17.ed4 Qd2 18.Nd2 Bg2 19.Kg2 Rd4+=) 16...de3 17.Qe3=) 15.Qb2 d4 becomes the focus of attention (better is 15.Qf4!? Bd8 16.Bh3+=) 15...Rfd8= 16.Nfd2 g5 (16...f4 17.Be4+=) 17.Bc6 Bc6 18.Nf3 Bf3 19.ef3 Qg7 20.Rfe1 Bf6 21.Re2 Qf8 22.Na5 Re8 23.Rae1 Rbd8 24.Nc6 Re2 25.Re2 (25.Qe2!? Ra8 26.f4+=) 25...Re8= 26.Re8 Qe8 27.Qd2?? (better is 27.Na5+=) 27...Qc6–+ 28.f4 g4 29.Qd1 Qe6 30.Kf1 (30.a4–+) 30...Qb3 (better is 30...Qa2 31.Qc1 Qb3–+) 31.Qb3+– c6 32.a4 h5 33.ab5 ab5 34.Qa2 h4 (34...Kg7 35.Qa6+–) 35.Qa8 Kg7 36.Qc6 (36.Qc6 hg3 37.fg3+–) 1–0. gbymar – Haroldlee123, ChessWorld.net, 2012.

5.d4 a5 6.b5= Na7 7.e3 Bd7 8.Nc3 Be6 9.Bd3 Bd6 10.Qf3 Qe7? (better is 10...c6!?=) 11.Nd5+/– Bd5 12.Qd5 0–0 (12...Ba3 13.Qb7 Qb4 14.Ke2+/–) 13.Qb7+– c6? (better is 13...Ba3 14.Ne2 Rfe8+–) 14.Qe7 Be7 15.b6 Nb5 16.c4 Nd6 17.c5 Nb5 (17...Nb7 18.Be4 Rac8 19.Ne2+–) 18.Bb5 (18.Ne2!? Rfd8 19.Be4 Rac8+–) 18...cb5 19.Ne2 Rfd8 20.c6 Re8 21.d5 Bc5 (21...Rab8 22.b7+–) 22.b7 Rab8 23.Kd2 Re5 (23...Bd6 24.Rhb1 b4+–) 24.c7 Rd5 (24...Ree8 25.cb8R Rb8 26.Rhc1+–) 25.Nd4! Rb7 (25...Bd4 26.cb8Q) 26.c8Q Bf8 27.Qb7 Rd8 28.Qb5 (28...Ra8 29.Rhc1+–) 1–0. orane – malta4, internet, 2005.

5.d4 Bg4 6.h3 Bh5 7.Nf3 =+.

5.e3 Be7 6.d4 0–0 7.Bd3 Re8 8.Ne2 Bf8 9.0–0 a5 10.b5 Ne7 11.Ng3 Be6 12.Qh5 g6 13.Qh4 Bg7 14.Nd2 Qd7 15.c3 Bf5 (better is 15...h6 16.Ne2 Rad8+=) 16.e4?? (better is 16.Nf5 Nf5 17.Qh3+/–) 16...g5–+ 17.Qh5 (17.Nf5 gh4 18.Nh4 de4 19.Ne4 Qg4–+) 17…Bg4 0–1. Ryan,Robert A – Gorodi,John G (1740), Royal Beacon Seniors op, 2005.

4.a3 Bd6

5.c3 0–0 6.e3 a5 7.b5 a4 (7...c5 8.Qh5=+) 8.Qh5 (8.d4 Be6=+) 8...Ra5 (8...Be6!?=+) 9.Qd5= c6 10.Qh5 cb5 11.Bb5 (The passed pawn on d2 will quickly become a dangerous weapon) 11...Bd7 (11...Be5 12.Qe2 Qd5 13.Bc4 Qg2 14.Qf3=) 12.c4 Qb6 (12...Na6 13.d4=) 13.Nc3+= Bc6 14.f3 (14.Nf3 Rd8+/–) 14...Nd7 (14...Re8 15.Qg4+=) 15.Nge2 (15.d4 Re8 16.Kf2 Qc7+=) 15...Nc5 (15...Ne5 16.Nd4 Nd3 17.Kf1 Bb5 18.cb5 Nf4+=) 16.0–0 (16.d4 Nd3 17.Kd2 Bb5 18.cb5+=) 16...Bb5?? (16...Nb3 17.Na4 Ra4 18.Ba4 Ba4=) 17.cb5 (17.Nb5?! Nb3 18.d4 Na1 19.Ra1 Qc6=+) 17...Nb3 18.Ra2 Be5 19.d4 Bd6 20.Qg4 Qc7 21.f4 Re8 22.Qf3 Raa8 23.Kh1 b6 24.h3 Re7?? 25.Nd5 Qb7 26.Ne7 Qe7 27.Qa8 Qf8 28.Qa4 Na5 29.Qc2 Qe8 30.a4 g6 31.Qd3 Qe6 32.Rc2 Kg7 33.f5 Qd5 34.e4 Qa8 35.fg6 hg6 36.d5 Nb7 37.Qd4 Be5 38.Qb6 Nd6 39.Qe3 Qa4 40.b6 Qc2 41.Rc1 Qb2 42.Nf4 Bd4 43.Qe1 Bb6 44.Rb1 Qe5 45.Nd3 Qd4 46.e5 fe5 47.Qe5 Qe5 48.Ne5 Bd4 49.Nd7 Be3 50.Ne5?? Kf6?? 51.Ng4+– (51...Ke7 52.Re1+–) 1–0. Kingog – bobsprint16, Caissa.com, 2004.

5.c3 a5 6.b5 –/+.

5.Nc3 c6 =+.

5.Nc3 d4 6.Ne4 Be5 =+.

5.e3 a5 6.b5 =+.

5.e3 Qe7 6.Be2 Bf5 7.Nf3 Nd7 (7...a5 8.b5=+) 8.h3 (8.Nc3 Nb6=) 8...0–0–0 (8...0–0 9.Nc3 c6 10.Nd4=+) 9.c4 (9.Nc3 Nb6=+) 9...dc4–/+ 10.Bc4 (10.Nc3–/+) 10...Be6 (10...Ne5 11.Ne5 Be5=+ (11...Qe5?! 12.d4 Qe4 13.0–0=)) 11.Be2 (11.Be6 fe6 12.d4 e5=) 11...Ne5 (11...Nb6 12.Nc3=+) 12.Nd4 (12.d4 Nf3 13.Bf3 Kb8=) 12...h5 (12...Bd7!?=+) 13.Ne6 fe6 14.d4 Ng6 (14...Nd7 15.Nc3=) 15.Nc3 (15.Qa4 Kb8 16.Nc3 Nh4+=) 15...Kb8 (15...e5 16.d5+=) 16.Ne4 (16.Qa4 e5 17.Rd1 ed4+=) 16...f5 17.Nd6 Qd6 (17...Rd6 18.Qb3=) 18.Bh5 (18.Rc1 e5 19.de5 Ne5=) 18...Ne7 (18...e5 19.Be2=) 19.Bf3 (19.Qe2 g5=) 19...g5 (19...e5 20.Rc1=) 20.Rb1 (20.Qc2!?+=) 20...g4=+ 21.Bg4 (better is 21.Be2=+) 21...fg4–+ 22.Qg4 Rdg8 23.Qf4 Rg2 24.Qd6–/+ cd6 25.Ke2 e5 26.de5–/+ de5 27.Rbd1 e4 28.Rd7 Nf5–+ 29.Rf7?? Ng3 30.Ke1 Nh1 31.Rf4 Rhg8 32.Re4 Rh2 33.b5 Nf2 34.Re7 Nd3 35.Kf1 Rgg2 36.Rf7 Ra2 37.Kg1 Rhb2 38.Rf8 Kc7 39.Rf7 Kd6 40.Kh1 Rb1 41.Rf1 0–1. badboy1221 – BANZAI, Live Game Caissa's Web, 2006.

5.Nf3 Bg4 6.e3 0–0 7.c4 dc4 8.Bc4 c5 (8...c6 9.h3 Bf5 10.d4=) 9.bc5= Bc5 10.0–0 Nc6 11.d4 Bb6 (11...Bd6 12.Bd3=) 12.Nbd2+= f5 13.Qc2 Rc8 14.Qa2 (14.Rac1 f4+=) 14...Bh5 (14...f4 15.Rae1=) 15.Rac1 Qe7 16.Rfe1 Rc7 17.d5 Ne5 18.Nd4 Nc4 (18...Qf6!? 19.Be2 Rc1 20.Rc1 Bg6=) 19.Nc4+/– (19.Rc4?! Rc4 20.Qc4 Qd7=) 19...Bc5? (19...Rc5 20.Nb6 ab6 21.Nf5+/–) 20.Nf5 (better is 20.d6!? Bd6 21.Nf5 Bh2 22.Kh2+–) 20...Qg5 21.d6 Bf3? (better is 21...Rd7 22.Ne5 Rd6 23.Nd6 Bd6+/–) 22.Ng3+– Be3 (22...Rd7 23.gf3 Bd6+–) 23.Re3 (23.Re3 Rc5 24.Qd2+–; worse is 23.dc7 Bc1 24.Nd6 Bd5+–; worse is 23.Ne3 Rc1 24.Rc1 Bc6+–; 23.gf3?! Bc1 24.dc7 Bf4+–) 1–0. Cerny,Lumir (1730) – Novotny,Tomas (1815), Decin Treybal op, 2006.

5.g3 0–0 6.Nc3 (6.e3 Re8–/+) 6...d4 7.Ne4 Be7 8.Bg2 c6 9.Nf3 f5 (9...Re8 10.e3 Bf8 11.Nc5=+) 10.Nc5=+ Bc5 11.bc5 Be6 (11...Na6!?=+) 12.Qb1= Qd7 13.Qb4 Rd8 14.Rb1 (better is 14.c3!?=) 14...Na6–/+ 15.Qa5 (15.Qb7?? Rab8 (15...Nc5? 16.Qd7 Bd7 17.Nd4+–) 16.Qb8 Rb8 17.Rb8 Nb8–+) 15...h6 (15...Qe7!?–/+) 16.0–0 (16.Ne5 Qe7 17.Nc6 bc6 18.Qa6 Qc5 A) 19.Bc6? Rd6–+ (19...Qc2?! 20.0–0 Rd6 21.Rfc1 Qd2 22.Rd1=); B) 19.Qc6?! Qa3 20.Qa8 Ra8 21.Ba8 Qa2=; C) 19.Qa4=) 16...g5 (better is 16...Qe7!?=+) 17.Ne5 Qe7 18.Bc6 Nc5 19.Bg2 Ba2 20.Rb2 Qe5 21.Ra2 b6 22.Qb4 Rab8 23.d3 f4 24.Qd2 fg3=+ 25.fg3 Re8 26.Bf3 Qe3 27.Qe3 Re3 28.Raa1 Na4 29.Rae1 Nc3 30.Bh5 Rf8 31.Rf2 f5 32.Ref1 Re5 33.Bg4 f4 34.gf4= gf4 35.Rf4 Rf4 36.Rf4 Ne2 37.Be2 Re2 38.Rf2 Re5 39.Kf1 Ra5=+ 40.Rf4 Ra3 41.Rd4 Ra2 42.Rc4 Kg7 43.Kf2 a5 44.d4 a4 45.d5 Kf7 46.Ke3= b5 47.Rb4 Rc2–/+ 48.Rb5 Rh2–+ 49.Rb7 Ke8 50.d6 a3 51.Ra7 h5 52.Kf4 a2 53.Kg5 h4 54.Kf6?? h3 55.Kg7?? Rd2 56.Kf6 Rd6 57.Ke5 Rd2 58.Ke6 Re2 59.Kd6 h2 (60.Rc7 a1Q 61.Rc8 Kf7 62.Rc7 Kf6 63.Rc5 Qd4 64.Kc6 h1Q 65.Rd5 Qhd5 66.Kc7 Rc2 67.Kb8 Qb6#) 0–1. golly1 – khani9, ChessWorld.net, 2007.

5.e3 0–0

6.Nc3 Be6 =+.

6.d4 f5 7.Nh3 =+.

6.d4 Bf5 7.c4 dc4 8.Bc4 c6 (8...Re8 9.Nf3=) 9.Nc3 Qe7 10.Qf3 Bg6 11.Nge2 a5 12.0–0 ab4 13.ab4 Ra1 14.Ra1 Bb4 15.Ba2 Rd8 16.Rc1 Nd7 (16...Bc3 17.Rc3 Qb4 18.h3–/+) 17.Bb1 Ra8 18.Bg6 hg6 (18...fg6 19.Rb1=+) 19.d5 (19.Ne4 f5 20.N4c3 Nf6=+) 19...f5 20.dc6 Ne5 21.Qg3 (21.Qd5 bc6 22.Qd1 Rd8–/+) 21...bc6 22.Rd1 (22.h3!?–/+) 22...Ra3–+ 23.Nb1 Rd3 24.Rd3 (better is 24.Rf1–+) 24...Nd3 25.Qb8 Kh7 (26.Kf1 Qh4–+) 0–1. Woschkat,Karl_Heinz – Kwong,Tom, IECG, 1998.

6.d4 Bf5 7.Bd3 Be6 =.

6.Be2 a5 7.b5 =+.

6.Be2 Be6 7.Nf3 a6 (7...Re8 8.0–0=+) 8.0–0= c5 (8...Nc6 9.d4=) 9.c3 (9.bc5 Bc5 10.d4 Bd6=) 9...c4 (9...Nd7 10.d4 c4 11.Nbd2=+) 10.Nd4 (10.d3 Qc7=) 10...Qd7 (10...Qc7 11.f4=+) 11.d3= Nc6 12.dc4 Nd4 13.cd4 (13.Qd4 dc4 14.Bc4 Bh2 15.Kh2 Qc7 16.Qf4 Qc4 17.Qc4 Bc4=) 13...dc4 14.Nc3 b5 15.Rc1 (15.Qc2 a5=) 15...Rac8 (15...a5 16.Bf3 Ra6 17.d5=+) 16.Bf3 (16.Qc2 a5=) 16...Bf5 (16...a5 17.d5 Bf5 18.e4 (< 18.ba5 Ba3 19.e4 Bc1 20.Qc1 Bg6–/+) 18...ab4 19.ab4=) 17.e4= Bg6 18.Re1 Rfe8 (18...Bf4 19.Rc2=) 19.e5 (19.Nd5 Qe6 20.Bg4+=) 19...fe5?? (better is 19...Bb8 20.Bg4 Bf5 21.Bf5 Qf5 22.ef6 Bf4=+) 20.de5+– Re5? (20...Bd3 21.ed6 Re1 22.Qe1 Re8+–) 21.Re5 Bd3 (21...Rd8 22.Rd5+–) 22.Rd5 (22...Qc7 23.g3+–) 1–0. Olsen,Birger – Skogholt,Jorgen Wara, Kretsmesterskap, 2002.

6.Qh5 Re8!? =+.

6.Qh5 g6 7.Qd5= Be6 (better is 7...c6!? 8.Qf3 Bf5=) 8.Qb7+/– Nd7 9.Nc3 Ne5 (9...a5!? 10.b5 Rb8+/–) 10.d4 Ng4 (10...Nc4 11.Bc4 Bc4 12.Qc6+–) 11.Nf3 (11.h3 Nh6+–) 11...Rb8 (11...a5 12.b5+–) 12.Qa7 (12.Qa6 Ra8+–) 12...f5 (12...Ra8 13.Qb7 Qb8 14.Qb8 Rfb8 15.Rb1 Ra3 16.Nb5 Bb4 17.c3 Rb5 18.Bb5 (18.Rb4 Rb4 19.cb4 Ra1 20.Kd2 Nf2–/+; 18.cb4?! Rb7+/–) 18...Bc3 19.Kf1+–) 13.d5 Bd7 14.Be2 Ne5 15.Qd4 (15.Nd2 Ng4+–) 15...Nf3 (15...Qe7 16.Nd2+–) 16.Bf3 (16.gf3 Qg5+–) 16...Rc8 (16...Re8 17.Ra2+–) 17.0–0 Re8 18.a4 Be5 19.Qc4 Qg5 (19...g5 20.a5+–) 20.a5 Qh6 (20...Qf6 21.Ra3+–) 21.g3 Bc3 (21...g5 22.Ra3+–) 22.Qc3 (22...g5 23.Qc4+–) 1–0. mrkt – hans72, zagraj.pl, 2006.

4.a3 Be7

5.Nc3 d4 6.Ne4 0–0 7.Nf3 Qd5 8.d3 a5 9.b5 Qb5 10.Nd4 Qb2 11.c3 f5 12.Rb1 Qa2 13.Nd2 Qa3 14.Qc2 Qd6 15.Rb5 Qf6 16.Nc4 a4 17.Ne3 c6 18.Rb1 a3 19.Qa2 b5 20.Nec2 f4 21.Rb3 Qd6 22.Nb4 Bd7 23.Nbc2 Re8 24.h4 Qd5 25.h5 h6 26.f3 Bc5 27.Kd1 b4 28.Rh4 Bd4 29.Nd4 c5 30.Rf4 cd4 31.c4 Qd6 32.Re4 Re4 33.de4 Ba4 0–1. Delfi 1.40 – ZChess222, computer chess game, 2001.

5.e3 0–0 6.Nc3 (6.Qh5 a5 7.b5 Be6+=) 6...c6 (6...a5 7.b5+=) 7.Nf3 (7.Qh5 b5+=) 7...Nd7 (7...b5 8.a4+=) 8.Be2= Ne5 9.d4 (9.0–0 Nf3 10.Bf3 Be6=) 9...Nf3+= 10.Bf3 Re8 (10...b5 11.e4 a5 12.ed5 ab4 13.ab4 Bb4 14.0–0=) 11.0–0 Bd6 12.Qd3 Bc7 (12...Qc7 13.h3=) 13.Ne2 (13.Rfe1 Qd6 14.g3 f5=) 13...Qd6 14.Ng3 f5 (14...Be6 15.b5=) 15.c4 (15.Rfe1 Be6+=) 15...f4 (15...dc4 16.Qc4 f4 17.ef4+=) 16.c5= Qd8 (16...Qh6 17.ef4 Qf4 18.Rae1+=) 17.ef4 Bf4 18.Rae1 (18.Rfe1 Be6=) 18...Re1 (18...Be6 19.Bd1=) 19.Re1= Bh6 (19...Be6 20.Ne2 Bc7 21.b5=) 20.Nh5 (20.b5+=) 20...g6 (better is 20...Be6!?=) 21.Re8+/– Qe8 22.Nf6 Kf8 23.Ne8 Ke8 24.g3 Bh3 25.Qe2 Kf8+/– 26.Qe5 Re8 27.Qh8 Ke7 28.Qh7 Kd8 29.Be4+/– Re4 30.f4 Re1 31.Kf2+– Bf8?? 32.Ke1 (32.Ke1 Be6 33.Qh8+–; 32.Qh3?! Re4 33.Qh4 Ke8+–) 1–0. Wall,Bill – JBC, chess.com, 2008.

5.e3 a5 6.b5 =.

4.a3 Bf5

5.d4 c6 6.Nd2 a5 7.c3 b5 8.Ngf3 a4 9.Nh4 Be6 10.g3 Be7 11.e3 f5 12.Ng2 Bc8 13.Qc2 Bg5 14.h4 Bh6 15.Nf3 g6 16.Bd3 Bg7 17.0–0–0 Nd7 18.h5 Nb6 19.hg6 fg6 20.Rh2 Qe7 21.Rdh1 Bf6 22.Nf4 Qf7 23.g4 fg4 24.Ng6 Rg8 25.Rh7 Qg6 26.Bg6 1–0. Roczniak – Lozinski, corr Poland 1981–82.

5.e3 Nd7 6.d4 Qe7 (6...Be6 7.Bd3=) 7.Nf3 (7.Bd3 Qe6=) 7...0–0–0 (7...Qe6 8.Bd3=) 8.Bd3 Bd3 (8...Be4 9.0–0=) 9.Qd3 g6 (9...Nb6 10.Nbd2+=) 10.c4 dc4 11.Qc4 Nb6 (11...Qe6 12.Nbd2+=) 12.Qc5 (12.Qc2 f5 13.0–0 f4 14.ef4 Qf6+=) 12...Qc5 (12...Qe6 13.Qc2+=) 13.bc5 Nc4 (13...Nd5 14.Nbd2+=) 14.Nc3 (14.Ke2 b6 15.Rc1 Na5 16.cb6 ab6+/–) 14...f5 15.0–0 c6 16.Ng5 Rd7= 17.a4 a5 18.Rfd1+= Be7 19.Nf3 g5 20.d5 g4 21.dc6 bc6 22.Rd7 Kd7 23.Rd1 Kc7 24.Nd2 Nd2–/+ 25.Rd2 Bc5 26.e4? Bb4–+ 27.Rc2 Re8 28.h3 g3 29.fg3? fe4 30.Ne2 e3 31.Nd4 Re4 32.Nf3?? e2–+ 33.Kh2 Re3 34.h4 e1Q 35.Ne1 Be1 36.Rc4 Bg3 37.Kg1 Re1# 0–1. badboy1221 – newkiller, Live Game Caissa's Web, 2006.

4.c3 Bd6

5.a3 0–0–/+ 6.d4 Bf5 (6...a5 7.Nd2–/+) 7.Nd2 (7.e3 a5–/+) 7...Re8 (7...a5 8.e3–/+) 8.e3=+ Qe7 (8...Qd7 9.Qf3=+) 9.h3 (9.Qf3 Qe6 10.c4 c6=+) 9...Nc6 (9...a5 10.Qh5 Qe6 11.Ngf3–/+) 10.b5 (10.Bb5 a5=+) 10...Na5 11.a4 (11.Qa4 b6=+) 11...b6 (11...Qe6 12.Ngf3–/+) 12.Be2 c6 13.Ngf3 cb5 (13...Rac8 14.0–0=+) 14.ab5 Rac8 15.Qc1 (15.Nh4!? Be6 16.Qc2=+) 15...Bb4–/+ 16.Qd1 (16.Ra4 Bc3 (< 16...Rc3 17.Qb2 Rb3 18.Qa2–+) 17.Qa3 Qe6–/+) 16...Bc3–+ 17.Rc1 Bd2 (better is 17...Qb4 18.0–0 Nc4 19.Nc4 A) < 19...Rc4 20.Nh4 (< 20.Bc4 dc4 21.d5 Bd3–/+) 20...Bd7 21.Bc4 dc4 22.Qc2=; B) 19...dc4–+) 18.Qd2? (better is 18.Nd2 Rc1 19.Qc1–/+) 18...Nb3–+ 19.Qb4 (19.Rc8 Nd2 20.Re8 Qe8 21.Kd2–/+) 19…Qb4 (20.Rc3 Qc3 21.Kf1 Qc1 22.Ne1 Nd2 23.Kg1 Qe1 24.Kh2 Qe2–+) 0–1. Borup,John – Sadler,Kirk, CL7–2001.22.01, 2001.

5.d4 0–0 6.Nf3 (6.e3 Be6=+) 6...Be6 (6...a5 7.b5=+) 7.e3= Nd7 (7...a5 8.ba5 Re8 9.Qb3=) 8.Be2 (8.Bd3 f5=) 8...Re8 (8...f5 9.Nbd2=+) 9.0–0 f5 (9...a5 10.b5=) 10.Nbd2 (10.c4 Qf6 (< 10...dc4 11.d5+/–; 10...Bb4? 11.Qb3+–) 11.c5 Be7=) 10...g5 (10...Nf6 11.a3=+) 11.Nb3 g4 12.Nfd2 Bh2?? (better is 12...Qh4 13.g3 Qh5=) 13.Kh2+– (13...Qg5 14.g3+–) 1–0. ana_goldberg – Kitvis, internet, 2005.

5.d4 a5 6.ba5 Bf5 (6...Ra5 7.e3=+) 7.e3 (7.Qb3 c6 8.Qb7 Qa5=) 7...0–0 (7...Ra5 8.Bd3 Bd3 9.Qd3=+) 8.Bd3 Bd3 9.Qd3 Ra5 10.Ne2 c5 (10...Nc6 11.Qc2=+) 11.0–0 (11.dc5 Be5=) 11...Re8 12.Nd2 Nc6 13.Qc2 Qd7 (better is 13...Qc7!? 14.Nf3 Rc8=+) 14.Nb3+/– Ra6 15.dc5 Bb8 16.Rfd1 Qc7 17.g3 Ne7 18.Rd2 Ba7 (18...Ra4 19.Qd3+/–) 19.Nf4 (19.c4!? Rd8+–) 19...Bc5+/– 20.Nd5 Nd5 21.Rd5 Bb4 22.Qd3 Qc3 (22...Bc3? 23.Rc5 Qc5 24.Nc5 Ba1 25.Na6 ba6 26.Qa6+–) 23.Qc3 Bc3 24.Rc1 Be5 25.Nc5 Ra2 26.Nb7 g6 27.Nd6 Rd8 28.Rcd1 Bd6 29.Rd6 Rd6 30.Rd6 Kg7 ½–½. Roczniak,Jan – Wasilewski, Poland, 1980.

5.d4 a5 6.b5 =+.

5.d4 Bf5 6.Nd2 0–0 7.e3 Re8 8.a3 Bg6 9.g3 Qe7 10.Bg2 c6 11.Ne2 Bh5 12.0–0 f5 13.Bf3 Bf3 14.Nf3 Nd7 15.Nd2 Nf6 16.c4 Rad8 17.Re1 Bc7 18.Rc1 g5 19.cd5 Nd5 20.Nc3 Nc3 21.Rc3 Rd4 22.Qc2 Rd5 23.Nf3 Bb6 24.Rc4 Qf6 25.Kg2 h6 26.h3 Qd6 27.Rf1 c5 28.g4 cb4 29.ab4 fg4 30.hg4 Re7 31.Rh1 Rc7 32.Rc7 Bc7 33.Nd4 Re5 34.Nf5 Qc6 35.Qc6 bc6 36.Rh6 c5 37.bc5 Rc5 38.Ra6 Bb6 39.Kf1 ½–½. Turczynowicz – Sternik, Olsztyn 1967.

5.e3 0–0 –/+.

5.Nf3 0–0 6.Qb3 c6 7.e3 –/+.

5.Nf3 Nd7 6.e3 (6.Nd4–/+) 6...Ne5 (6...0–0 7.Be2–/+) 7.Ne5 (7.d4!? Ng4 8.Bd3=) 7...fe5–/+ 8.Na3 (8.c4 dc4 9.Bc4 0–0–/+) 8...c6 (8...a5 9.Nc2–/+) 9.Be2 (9.Nc2 Bf5–/+) 9...a6 (9...a5 10.Nc2–+) 10.0–0 0–0 11.Nc2 Qh4 (11...Qg5 12.a4–/+) 12.g3 (12.Ne1 Qh6–+) 12...Qh6 13.f4 Bh3 14.Rf2 Bf5 (better is 14...ef4 15.ef4 Rfe8–/+) 15.fe5+= Bc2 16.Qc2 Be5 17.Rf5 (17.Qf5 Qe6=) 17...f6 (17...Qe6 18.Raf1=) 18.Raf1 (18.a4 g6 19.Rf2 a5=) 18...g6 (18...Rae8 19.a4=) 19.R5f3 f5 20.d4 (20.a4 a5=) 20...Bc7 (20...Bg7 21.c4=) 21.Bd1 (21.c4 Rf7=) 21...Rae8 22.Qg2 Qg7 23.Bc2 Qe7 24.Qd2 Qg5 25.Kh1 Rf6 26.Bd1 Rfe6 27.Kg2 Bd8 28.Bb3 b5 29.Re1 Qh6 30.h4 Re4 31.Bc2 Rg4 32.Rf4 Qh4 33.Rg4 Qg4–+ 34.Rf1 Bc7 35.Rf3 Qg5 36.Qf2 Bd6 37.Bd3 Bf8 38.Rf4 Qe7 39.Rf3 Bh6 40.Qe2 Be3 41.Kh3 Bg5 42.Qe7 Re7 43.a4? Re3 44.Re3 Be3 (45.ab5 cb5–+) 0–1. 1805DYDIDIDY – rodl@, mySchach.de, 2005.

5.g3 0–0 6.Nf3 Re8 7.e3 Bg4 8.Bb5 c6 9.Bd3 Bh3 10.Ng1?? Bg2–+ 11.Bh7 Kh7 12.Qh5 Kg8 13.d4 a5 14.Nh3 Bh1 15.Nd2 ab4 16.Ke2 bc3 17.Rh1 Ra2 18.Rd1 Qa5 19.Ke1 cd2 20.Ke2 Qb5 21.Kf3 Qd3 22.Nf4 Bf4 23.gf4 Ra1! 24.Kg2 Qc3 25.Qe2 Rd1 26.Qd1 Qc1 27.Qd2 Qd2 28.h4 Re3 29.h5 Qe2 30.f5 Qf3 31.Kf1 Qh1# 0–1. Krahl,Wolfgang – Rizzi,Davide, C2.1998.0.00113, 1998.

4.c3 Bf5

5.d4 Bd6 6.e3 0–0 7.Bd3 Bd3 8.Qd3 c6 9.a4 Re8 10.Ne2 Nd7 11.Nd2 (11.a5 Qc7=) 11...Nf8 (11...Qc7 12.a5=) 12.0–0 Qc7 13.f4 Re7 14.Rf3 Rae8 15.Nf1 (15.Ng3 a5=) 15...b6 (15...Ng6 16.Neg3+=) 16.Nfg3= g6 17.a5 f5 18.ab6 ab6 19.h4 (19.b5!?=) 19...Nd7+= 20.Nf1 Nf6 21.Neg3 c5 22.bc5 (22.dc5 bc5 23.b5 Re4+=) 22...bc5–/+ 23.h5 Ne4 24.h6 Rb8 (24...c4 25.Qc2–/+) 25.dc5 (25.c4 dc4 26.Qc4 Ree8 27.dc5 Bc5 28.Ne4 fe4+= (28...Re4?! 29.Qc3 f6 30.Rc1=)) 25...Qc5–/+ 26.Qd4 Qc3 27.Nf5? (better is 27.Ra5–/+) 27...gf5–+ 28.Rg3 (28.Qc3 Nc3 29.Ng3–+) 28...Ng3 29.Ng3 (29.Qc3?? Ne2 30.Kf2 Nc3–+) 29...Qd4 (29...Re3 30.Qc3 Rc3 31.Nf5 Bc5 32.Kh2–+) 30.ed4 Reb7 (better is 30...Bf4 31.Nf5 Re6 32.Ra5–+) 31.Ra5 (31.Nf5 Bf4 32.Kf2 Bd2–+) 31...Bf4 (better is 31...Rb1 32.Kf2 Bb4 33.Rd5 Be1 34.Ke2 Re8 35.Re5 Re5 36.fe5 Bg3 37.Kd3–+) 32.Nf5 Rd8 (32...Rb1!? 33.Kf2 R8b2 34.Kf3 Rf1 35.Kg4 Rg2 36.Kh3 Rh2 37.Kg4 Bh6 38.Rd5–+) 33.Kf2 f6 (33...Kf8 34.g3 Bd2 35.Ra2–+) 34.Kf3 Bg5 35.Kg4 Rb1 (35...Kf7 36.Kh5–+) 36.Ra7 (36.g3 Bd2 37.Rc5 Kh8–+) 36...Rh1 37.Rg7 (37.Ra6 Kh8 38.Nd6 Rh4 39.Kf5 Kg8–+) 37...Kh8 38.Re7 (38.Rf7 Bh6 39.Kg3 Bg5–+) 38...Bh6 39.Re6 (39.Re2–+) 39...Rg8 40.Kf3 Rf1 (40...Rf1 41.Ke2 Rf5–+) 0–1. Gorniewicz,Oskar (1840) – Ostrega,Przemyslaw, VI MFSz Turniej Otwarty Poland, 2009.

5.Nf3 a5 6.ba5 Ra5 7.e3 =+.

5.Nf3 c5 6.a3 Nc6 7.e3 Be7 8.bc5 Bc5 9.d4 Bd6 10.Bd3 Qd7 11.0–0 0–0 12.Be2 Qc7 13.Qb3 Rfd8 14.Nbd2 Na5 15.Qb2 a6 16.Rfc1 b5 17.g3 Rab8 18.Nh4 Bh3 19.Qc2= g6 20.f4 Nc4 21.Nc4 bc4 22.Kf2 Rb3–+ 23.g4 Rdb8 24.a4? Bg4!!–+ 25.Rcb1 Be2 26.Ke2 Qd7 27.Rb3 cb3 28.Qd1 Qc6 29.Kd2 Qc4 30.h3 b2 31.Rb1 Rb3 (32.Qc2 Rc3 33.Qc3 Bb4 34.Qb4 Qb4 35.Kd3 Qb3 36.Kd2 Qa2–+) 0–1. Kupec,Jan – Krc,Radko, CiF, 1996.

4.d4 Bb4–/+

5.c3 Ba5 6.e3 0–0 7.Nf3 Re8 8.Qa4 c6 9.Qb3 Nd7 (9...f5 10.g3–/+) 10.Bd3 Nf8 11.0–0 Bc7 12.Nbd2 Qd6 13.Rfe1 Bg4 (13...b6!?+=) 14.Qb7= Reb8 15.Qa6 Rb2 16.Red1 (16.c4 Bc8 17.Qa4 a5+=) 16...f5?? (16...Rd2 17.Rd2 Bf3 18.gf3 Qh2 19.Kf1 Qh1 20.Ke2 Qa1 21.Qc6 Rc8=) 17.Qa4?? (17.Rab1 Rb6 18.Rb6 Bb6+/–) 17...Nd7?? (17...Rd2!? 18.Rd2 Bf3 19.gf3 Qh2 20.Kf1 Qh1 21.Ke2 Qa1 22.Qc6 Ba5 23.Qa8 Bc3 24.Qd5 Bd2 25.Kd2 f4+=) 18.h3 (18.Rab1 Nb6 19.Qa6 Rb1 20.Rb1 f4+=) 18...Bf3 (better is 18...a5 19.c4 Bf3 20.Nf3 Nb6–/+) 19.Nf3+= a5 20.Rab1?? (better is 20.Rdb1 Nb6 21.Qd1 Rb1 22.Rb1+=) 20…Nb6–+ (20...Nb6 21.Qc6 Qc6 22.Rb2 Nc4–+ (22...Qc3?! 23.Rc2 Qa3 24.Rc7–/+)) 0–1. Henkel,Phil (1905) – Schmitt,Harald (1860), RSS4D easy–61, 2007.

5.c3 Bd6 6.e3 Nc6 7.Bb5 a6 8.Qa4 0–0 (8...ab5?! 9.Qa8 0–0 10.a4=) 9.Bc6 bc6 10.h3 Bd7 11.Qc2 c5 12.Ne2 Re8 13.0–0 Qc8 14.dc5 Bc5 15.Nf4 Bb5 (15...Bf5 16.Qd2 c6 17.c4 dc4 18.Qc3–+) 16.Re1 c6 17.Nd2 a5 18.Nb3 Bd6 19.Nd4 Bf4 20.ef4 Re1 21.Re1 a4 22.Nf5 Qd7 23.g4 g6 24.Nh4 c5 Black plans d4 25.Kh2 d4 26.Rd1 Rd8 27.Nf3 d3 28.Qd2 c4 29.Rb1 Bc6 30.Rb4?? (better is 30.Nd4–+) 30...Bb5 (better is 30...Qd5 31.Ne1 Qh1 32.Kg3 Re8 33.Rc4 Re2 34.Qd3 Qg1 35.Kh4 Qf2 36.Qg3 g5 37.fg5 fg5 38.Kh5 Qg3 39.Nf3 Qh3 40.Kg5 h6 41.Kf5 Qf3 42.Rf4 Qd5 43.Kf6 Qe6) 31.Nd4 (31.Rb1 Kg7–+) 31...Bc6 (better is 31...Ba6–/+) 32.Rc4= Bd5 33.Rc5 a3 34.c4 Be4 35.f3?? Qd4–+ 36.fe4 Qe4 37.Rc7?? Qe2 38.Qe2 de2 39.Re7 Rd2 40.Kg2 e1Q 41.Kf3 Qe7 42.Kg3 Qe1 43.Kf3 Qe2 44.Kg3 Qf2 0–1. 488 – pieeater, ChessWorld.net, 2012.

3.Bf6 gf6

4.b5 Bd7 5.e3= c6 (5...Rg8 6.c4 dc4 7.Bc4=) 6.a4 (6.Nc3 e5=) 6...Qb6 (6...e5 7.Nc3=+) 7.c4 (7.Nc3 e5=) 7...dc4 8.Bc4 cb5 9.ab5 Bb5 (9...Rg8 10.Qh5 e6 11.g3=) 10.Bb5 (better is 10.Qb3!? Ba6 11.Bf7 Kd7 12.Qb6 ab6 13.Nf3+=) 10...Qb5=+ 11.Nc3 Qd7 12.Nge2 Nc6 13.0–0 0–0–0 (better is 13...Rg8=) 14.f4?? (14.d4!? Rg8 15.Qb3+=) 14...e5 (better is 14...Qd2!? 15.Qb3 Qe3 16.Kh1 e6–+) 15.fe5 fe5 16.d4 ed4 17.ed4 Kb8 18.Nb5 a6–/+ 19.Nbc3 Nd4 20.Nd4 Qd4 21.Qd4 Rd4 22.Ne2? Rd2 23.Nf4 Bc5 24.Kh1 Rg8 25.Ra5 Bd6 26.Rd5 Rb2 27.Rd6+/– Kc7 28.Rdd1 Kb8 29.Nd5?? Rgg2–/+ 30.Rg1?? Rh2# 0–1. umji5 – lled, Live Game Caissa's Web, 2004.

4.b5 e6 5.e3 Qd6 (5...e5 6.Nf3=+) 6.c4 dc4 (6...d4 7.Be2=) 7.Bc4 Be7 (7...Rg8 8.Qf3=) 8.Ne2 e5 (8...a6 9.ba6 Na6 10.d4=) 9.0–0 Be6 10.Be6 fe6 11.a4 Nd7 12.Nbc3 (12.Qc2 Rd8=) 12...0–0–0 13.Ne4 (13.a5 Rhg8=) 13...Qb6 (13...Qd3!? 14.f3 Kb8=+) 14.d4 f5 15.N4c3 ed4 16.Nd4 Ne5 (16...Bb4 17.Qb3 Qa5+/–) 17.a5 Qd6 (17...Qc5 18.Qb3 Qc4 19.Qc4 Nc4 20.Ne6+/–) 18.b6 (18.a6 Rhg8 19.ab7 Kb7+–) 18...cb6 (18...Ng4 19.g3 cb6+/–) 19.ab6 (19.Ncb5 Qb8+/–) 19...Qb6 (19...Ng4 20.f4 Qb6 21.Qc1=) 20.Rb1 (20.Qc2 Kd7=) 20...Qa5 (20...Qa6 21.Qb3+=) 21.Rb5 (better is 21.Qc2+/–) 21...Qc3= 22.Qb1? b6?? 23.Rc1+– Qc1 24.Qc1 Kb7 25.f4 Nd3 26.Qc6+– Kb8 27.Ne6 Rc8 28.Qd7?? Bc5 29.Nc5 Nc5 30.Qd6 Kb7 31.Qd5+– Ka6 32.Rb1 Rhd8 33.Ra1 Kb5 34.Rb1?? Ka6 35.Qc4 Kb7 36.Qf7 Ka6 37.Ra1 Kb5 38.Qh7 a5 39.Qf5 Re8 40.g4 Re3 41.Qb1 Ka6 42.Qf1 Kb7 43.f5 Rce8 44.f6 Ne4 45.Re1 Re1+/– 46.Qe1 Re6?? 47.Qh4 Nf6+/– 48.g5 Re4 49.Qh6 Ng4?? 50.Qh7 Ka6 51.Qe4 b5 52.Qg4 a4 53.Qe6 Ka5 54.Qe3 b4 55.Qc5 Ka6 56.Qb4 a3 57.Qa3 Kb6 58.Qd3 Kc6 59.g6 Kc5 60.g7 Kc6 61.g8Q Kc7 62.Qdd5 Kb6 63.Qg6 Kc7 64.Qdf7 Kd8 65.Qgg8# 1–0. umji4 – Constantine, Live Game Caissa's Web, 2004.

4.c3 Nc6 5.Na3 (5.e3 e5=) 5...Bf5 (5...e5 6.Nc2=+) 6.Nf3 (6.Nc2 e5=+) 6...Qd7 (6...e5 7.Nc2=+) 7.e3 (7.Nh4 Bg6=) 7...Ne5 (7...a5 8.Qa4=+) 8.Nd4 (8.d4 Nf3 9.Qf3 0–0–0=+) 8...Bg6 (8...Nd3 9.Bd3 Bd3 10.Nb3–/+) 9.Bb5 (9.Nb3!?=) 9...c6–/+ 10.Be2 e6 (10...Nd3 11.Bd3 Bd3 12.Ne2–/+) 11.0–0 (better is 11.d3=) 11...a6 (11...Nd3 12.Nac2=+) 12.d3 (12.f4!? c5 13.fe5 cd4 14.ed4 (< 14.ef6 d3 15.Bf3 a5=+; < 14.Rf6 dc3 15.dc3 Qc7=+) 14...fe5 15.de5+=) 12...a5 (12...c5 13.bc5 Bc5 14.Nac2=) 13.Nac2 ab4 14.Nb4?? (better is 14.cb4 c5 15.bc5 Bc5 16.a4=) 14...c5–+ 15.Nd5 Qd5 16.c4 Qd8 17.Nb3 f5 18.f4 Nc6 19.a3 b6 20.Bf3 Rc8 21.g3 Bg7 22.Ra2 0–0 23.h4 f6 24.h5 Be8 25.Kf2 Nb8 26.Rh1 h6 27.Qb1 Bc6 28.Nd2 Rf7 29.Rb2 Bf3 30.Nf3 Rb7 31.Rb5 e5 32.Nh4–/+ Rd7 33.Rb3 e4 34.Nf5=+ Rd3 35.Rd3 ed3 36.Rd1 Qd7 37.g4 Rd8= 38.Qb6 Bf8 39.Qf6+– Nc6 40.Qg6 Kh8 41.Qf6 Bg7?? 42.Ng7+– Qg7 43.Qc6 Qb2 44.Kg3 Qe2 45.Qh6 Kg8 46.Qg5 Kf7 47.Qd8 Qd1 48.Qd7 Kf6 49.g5# 1–0. mic (2205) – tightfist (2245), net–chess.com, 2007.

4.c3 Bd7 5.g3 (5.d4 a5=) 5...e5 6.a3 (6.Bg2 Be6=+) 6...Bh6 (6...a5 7.Bg2 ab4 8.cb4=+) 7.Bg2= Be6 (7...c6 8.e4 de4 9.Be4=) 8.d4 (8.c4=) 8...ed4 (8...a5 9.b5=) 9.Qd4 (9.cd4 a5 10.b5 c6+=) 9...Nc6= 10.Qc5 Qd6 (10...Qe7!? 11.Qe7 Ne7=) 11.Qd6+/– cd6 12.Nf3 0–0–0 (12...Rc8 13.0–0+/–) 13.0–0 Rhe8 (13...Ne5 14.Rd1+/–) 14.e3 a5 15.Nbd2 ab4 16.cb4 b5? 17.Rac1 d4?? 18.Rc6 Kb7 19.Nd4 Bg7 20.Nb5 Kb8 21.Nd6 Re7+– 22.N6c4 Bc4 23.Nc4 Rd3 24.Rc1 f5 25.a4 Rc3 26.Rc3 Bc3 27.h4 Bb4 28.Rb6 Rb7 1–0. rodnel – oracleinshadows (1725), net–chess.com, 2006.

4.e3 e6 5.a3= c5 6.bc5 Bc5 7.Bb5 Nc6 8.c4 (8.Ne2 Bd6=) 8...a6 (8...dc4 9.Bc4 Rg8 10.g3=+) 9.Bc6= bc6 10.cd5 cd5 11.Nc3 Bd7 (11...d4 12.Qf3 dc3 13.d4–/+) 12.Na4 (12.Nf3 Qe7=) 12...Bd6=+ 13.Nf3 Rb8 (13...h6 14.Nc3=+) 14.Nd4 (14.Nc3 Qe7=+) 14...Qe7 (14...e5!? 15.Ne2 d4 16.ed4 ed4–/+) 15.Nc3=+ Ba3 16.Qg4 (16.Nc2 Bb2 17.Ra6 Rg8=+) 16...f5 (16...Qd6!?–/+) 17.Qg7 (17.Nf5 Qf8 (< 17...ef5 18.Qg7 Rf8 19.Ra3+/–) 18.Qg3 Rb6=) 17...Qf8 18.Qf8 (18.Nf5 Rb3 19.Qg3 ef5 20.Ra3 Ra3 21.Qb8 Ke7 22.Qe5 Kd8 23.Nd5 f6 24.Qb8 Bc8 25.Qc7 Ke8 26.Qc8 Kf7 27.Qd7 Kg6 28.Ne7 Qe7 29.Qe7 Ra1 30.Ke2 Rh1+–) 18...Bf8=+ 19.Ra6 Bg7 20.0–0 0–0 21.Ra7 Bd4 22.Rd7 Bc3–/+ 23.dc3 Rfc8 24.Rc1 Rc3–/+ 25.Ra1 Rc2 26.g3 Rbb2 27.Rf1 Kg7 28.Kg2 Kg6 29.Kf3 Rd2 30.h4 Rb3 31.h5 Kf6 32.Re1 Rbb2 33.Rf1–/+ e5 34.Kg2 e4 35.Kg1 d4 36.Rd4–/+ Rd4 37.ed4 Rd2 38.Rb1 Rd4 39.Rb7 Rd2 40.Kf1 Ra2 (41.Rc7 h6–+) 0–1. Suutarla,Ari – Gimadeev,Anatoli, IBCA–ol blind 4th prel–A, 1972.

4.g3 e6 5.a3 b6 6.Bg2 Bb7 7.c4 Bg7 8.cd5 Bd5 9.Qa4 (9.Bd5 Qd5 10.Nf3 f5+=) 9...Qd7 (better is 9...b5!? 10.Qb5 c6 11.Bd5 cb5 12.Ba8 f5=+) 10.Qd7+= Nd7 11.Bd5 ed5 12.Nc3 f5 13.Rb1 Bc3 14.dc3 0–0–0 15.e3 Ne5 16.Ke2 Nc4 17.a4 Rde8 (17...Rhe8 18.Nf3+=) 18.Nf3+= f6 (18...f4 19.gf4 Rhg8 20.b5+/–) 19.Nd4 Nd6 (19...f4 20.gf4 Rhg8 21.Rhg1+/–) 20.Rhd1 Kb7 21.Rd3 h5 22.Nb5 Ne4 23.f3 (23.Rd5 a6 24.f3 ab5 25.fe4 ba4 26.ef5 Re4+/–) 23...Ng5? (23...a6 24.Na3 c6 25.fe4 fe4+–) 24.Rd5+– c6 25.Nd6 Ka8 26.Ne8 Re8 27.Rf5 Ne6 28.Rf6 Kb7 29.Rd1 Nc7 30.e4 a6 31.Rdd6 b5 32.ab5 Nb5 33.Rc6 Ra8 34.Rb6 Kc7 35.Ra6 Ra6 36.Ra6 Nc3 37.Kd3 Nd1 38.e5 Kd7 39.e6 Ke7 40.b5 Nb2 41.Kd4 Nd1 42.b6 Ke6 43.b7 (43...Kd7 44.b8Q h4 45.Qb7 Ke8 46.Ra8) 1–0. touwladder – jimmyjf, ChessWorld.net, 2004.

4.b5 e5

5.Nf3 =+.

5.g3 Bf5 6.Bg2 Bc5 7.e3 Nd7 (better is 7...Rg8+=) 8.Bd5+/– Rb8 9.g4 Bg6 10.h4 h5 11.Nc3 Nb6 12.Bf3 (better is 12.gh5!? Rh5 13.Bf3+/–) 12...hg4+= 13.Bg4 f5 14.Be2 Rh4 15.Rh4 Qh4 16.Nf3?? (better is 16.Bf1+=) 16...Qh1–+ 17.Bf1 Bh5 0–1. mic (2330) – cborri (2520), net–chess.com, 2016.

4.c3 e5

5.e3 c5 6.Bb5 (6.bc5 Bc5 7.d4 Be7=) 6...Nc6 (6...Bd7 7.Bd7 Qd7 (< 7...Kd7 8.bc5 Rg8 9.d4+=) 8.bc5 Bc5=) 7.d3 (7.bc5 Bc5 8.d4 Be7=) 7...d4 (7...cb4!? 8.Nf3 Rg8–/+) 8.ed4 (8.bc5 de3 9.fe3 Qd5=) 8...ed4 (8...cd4!? 9.a3 Qd5 10.Bc6 Qc6=+) 9.bc5+= Bc5 10.Ne2 dc3 11.Nbc3 Qe7 (11...0–0!?+=) 12.d4+/– Bb4 13.Qd2 (13.0–0!? Bg4 14.Nd5+–) 13...Bg4+= 14.f3 Bd7 15.0–0–0 (15.0–0 Kd8+=) 15...Ba3 (15...Rc8 16.Rhe1=) 16.Kb1+= Bf5 (16...Rc8 17.d5 Ne5 18.d6+=) 17.Ka1 0–0–0 18.Bd3 (18.Bc6 bc6 19.Rhe1 Rhe8+=) 18...Bd3 (18...Be6!?=) 19.Qd3+= Nb4 (19...Kb8 20.Rhe1+=) 20.Qd2 (20.Qc4 Kb8 21.Qb3 Rhg8+/–) 20...Qe6 (20...Rhg8!? 21.Ng3 Nd5+=) 21.Nb5+/– Qa6 22.Nec3 Qa5 23.Qf4 Nc2 24.Kb1+– a6 25.Na7 Kd7 26.Kc2 Ra8 27.Nc6! bc6 28.d5 c5 29.Qf5 Kd8? 30.d6 Bb4 31.Qf6 Kc8 32.Qh8 Qd8 33.d7 Kc7 34.Nd5 Kd7 35.Nb4 Kc7 36.Qe5 Kb7 37.Qe4 Kb6 38.Qc6 Ka7 39.Qc5 Qb6 40.Nc6 Kb7 1–0. ifairclough – quikeagle, net–chess.com, 2002.

5.e3 Bd6 6.Qb3 Be6 7.c4 dc4 8.Bc4 =+.

5.e3 h5 6.Be2 (6.Nf3–/+) 6...f5 (better is 6...Rg8 7.g3 Nc6–/+) 7.Bh5? (better is 7.Nf3 Bd6 8.Qb3=) 7...Qg5–+ 8.Be2 Bd6?? (better is 8...Qg2 9.Bf3 Qg7–+) 9.g3= Be6 (9...e4 10.Na3 a6 11.Qa4 Bd7 12.Nb5 Bb5 13.Bb5 c6 14.Bf1=) 10.f4 (10.Nf3 Qh6=) 10...Qg7+= 11.Nf3 Nd7 12.Na3 d4 13.fe5 Ne5+= 14.cd4 Ng4 15.Nh4?? Nh2!–+ 16.Bf3 Qg3 17.Ke2 Rh4 18.Bb7 Rd8 19.Qa4 Bd7 20.Qa7 Re4 21.Raf1?? Qg2–+ 22.Kd1 Bb4 23.Nb1 Nf1 24.Rh8 Ke7 25.Rd8 Kd8 26.Be4 Qg4 27.Ke1 Ne3 28.Qb8 Bc8 29.Qb4 Qd1 30.Kf2–+ Qf1 31.Ke3 f4# (31...fe4?! 32.Qf8 Kd7 33.d5–/+) 0–1. ovid7 (1810) – queensservant (1765), gameknot.com, 2014.

5.Nf3 =+.

4.e3 e5

5.a3 a5 6.b5 c5 7.c4 Be6 8.d3 dc4=+ 9.dc4 Qd1 10.Kd1 Nd7 11.a4 0–0–0–/+ 12.Nd2 Rg8 13.Kc2 Nb6 14.g3 f5 15.f4 e4 16.Nh3 Bg7 17.Ra2 h6 18.Be2 Rd6 19.Rd1 Rgd8 20.Nf2 Na8 21.h3 Kc7 22.g4 Re8 23.gf5 Bf5 24.Bg4 Bg6 25.f5 Bf5? 26.Bf5+– Rf6 27.Bd7 Kd7 28.Nde4 Kc7 29.Nf6 Bf6 30.Rd3 Nb6 31.Kb3 Bh4 32.Re2 f5 33.Rc2 Nd7 34.Nd1 Bg5 35.Rf2 (White fights for the Initiative) 35...Rf8 36.Rd5 f4 37.ef4 Bf4 38.Nc3 Bd6 39.Ne4 Rf2 40.Nf2 Nf6 41.Rf5 Be7 42.Ng4 Ng8? 43.Rf7 (43...h5 44.Nh6 Nh6 45.Re7 Kc8 46.b6+–) 1–0. Roczniak,Jan – Korzeniowski, Poland, 1985.

5.c3 d4 6.Qa4 Bd7 7.Bb5 f5 8.Nf3 b6?? (8...c6 9.Bf1 de3 10.de3 e4+=) 9.Bd7 (better is 9.Ne5 de3 10.de3+– (10.fe3?! c6 11.Qb3 Qh4 12.g3 Qe7 13.Nd7 Qd7+–)) 9...Qd7+= 10.Qd7 (10.Ne5?? Qa4 11.cd4 Bb4–+) 10...Nd7 11.cd4 ed4 12.Nd4 Bg7 13.Nc3 0–0–0? 14.a4?? f4? 15.0–0 Rhe8?? 16.Nc6+– fe3 17.fe3 Bf6 18.Nd8 Rd8 19.Nd5 Ba1+/– 20.Rf7?? h5 21.Rh7 Nf6 22.Nf6 Bf6 23.Rh5 Rd2 24.b5 Ra2 25.Rf5 Bc3 26.g4 Re2 27.Rf3–/+ Kd7 28.h4 Ke7 29.h5 Bf6 30.Kf1 Rd2 31.Rf5 Rd8 32.g5 Rf8? 33.gf6 Rf6 34.Rf6 Kf6 35.Kf2 Kg5 36.Kf3 Kh5 37.Kf4 Kg6 38.e4 White threatens Kf6 38...Kf6 39.Ke3 Ke5= 40.Kf3 Kd6 41.Kf4 c5 42.Kf5 c4 43.e5 Ke7 44.e6?? c3–+ 0–1. Willi_weizenkeim – Gordon, playchess.de, 2005.

4.Nf3 e5

5.a3 c5 =+.

5.b5 Bf5 6.e3 c5 7.c4 d4 8.ed4 cd4 9.d3 Nd7 10.Nbd2 Nc5 11.Qc2 Qa5 12.Be2 Bh6 13.0–0 Rg8 (Better is 13...Qc3!? 14.Rac1 Bd2 15.Qd2 Qd2 16.Nd2 Bd3 17.Bd3 Nd3–+) 14.Nb3=+ Nb3 15.ab3 Qc7 16.Nh4 Be6 17.g3 Bh3 18.Rfe1 Kf8 19.Bf1 Be6 20.Bg2 Kg7 21.Rf1 Kh8 22.Ra4 a5 23.ba6 Ra6 24.Rfa1 Rga8 25.Ra6 Ra6 26.Ra6 ba6 27.Qa2 a5 28.Qa4 Bf8 29.Qe8 Kg7 30.Qa8 Bb4 31.Bd5 Bd5 32.Qd5 Qa7 33.Nf5+/– Kg6 34.g4 h5 35.h3 hg4 36.hg4 a4?? (37.Qh1 Kg5 38.Qh4 Kf4 39.Nh6 Kf3 40.Kf1 ab3 41.Qf6#; Better is 36...Kh7+–) +–. bashful – IPKnightly, Live Game Caissa's Web, 2004.

3.g3 e6

4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 d5 4.g3).

4.Bg2 Bb4–/+

5.a3 Bd6 6.d3 e5 7.Nd2 Be6 8.Ngf3 Nbd7 9.0–0 h6 10.Ra2 0–0 11.Qa1 a5 (11...d4!? 12.Nb3–+) 12.c4 (12.Ne5!? Be5 13.Be5 Ne5 14.Qe5+=) 12...dc4 13.Nc4 b5 14.Ncd2? (better is 14.Nce5 Ba2 15.Qa2–/+) 14...Ba2 15.Qa2 Rb8 16.Ne5? (16.a4–+) 16...Ne5 17.f4 (17.d4 Ng6–+) 17...Neg4 18.h3 (18.Rc1 c5–+) 18...Ne3 19.Rc1 Ng2 20.Kg2 c5 21.Ne4 (21.Nf3 Re8 22.e4 Nd7–+) 21...Ne4 22.Qd5 (22.de4 c4 23.a4–+) 22...Nf6 (better is 22...Ng3 23.Qf3 Nf5 24.Kh1–+) 23.Qf3 Qe7 24.Re1 (24.e4 Nd7–+) 24...Qd7 (24...c4!? 25.Rb1–+) 25.e4 (25.Bf6 gf6 26.Qh5 Kg7–+) 25...Nh7 26.Rd1 b4 27.e5 Be7 28.d4 cd4 29.Bd4 (29.Rd4 Qf5 30.ab4 Rfc8–+) 29...b3 (better is 29...Rfd8 30.Rd2–+) 30.Rd2 (30.Bb2 Qf5 31.Rd2 Rfd8–+) 30...b2! 31.Rd1 (31.Rb2 Qd4 Deflection; 31.Bb2 Qd2 Double attack (31...Qd2 Pinning; 31...Qd2 Deflection; 31...Qd2 Decoy)) 31...b1Q 32.Rb1 Rb1 33.Bf2 Ba3! 34.Qa3 Qd5 (34...Qd1 35.g4 Rfb8 36.Qe3 R8b3 37.Qe1 Qf3 38.Kf1 R3b2 39.Kg1 Qf2 40.Kh1 Qe1) 35.Qf3 Qf3 36.Kf3 a4 37.Kg4 a3 38.h4 a2 39.h5 a1Q 0–1. nimzou (1990) – mpopp (2170), net–chess.com, 2013.

5.Nf3 0–0 6.0–0 Nc6 7.a3 Bd6 8.d4 h6 9.Nbd2 a6 10.Ne5. pierre – degenen, internet, 2009.

5.Nf3 c5 6.a3 Ba5 7.0–0 Nc6 8.d4 Qb6 9.Bc3 (9.Ra2!?–/+) 9...Bc3–+ 10.Nc3 cd4 11.Na4 (11.Rb1 Qc5 12.Nb5–+) 11...Qa5 12.c3 dc3 13.Nc3?? (13.Rc1–+) 13...Qc3 14.Re1 0–0 15.a4 Nd4! (15...Nd4 16.Nd4 Bd7–+) 0–1. Knightprancer – Idelis, playchess.de, 2004.

5.Nf3 c5 6.c3 Ba5 7.0–0 0–0 8.Qc2 h6 9.d4 cd4 10.Nd4 Nc6 11.Nb3 Bb6 12.Bf3 e5 13.N1d2 Bh3 14.Rfe1? e4 15.Bg2 Bg2 16.Kg2 Ng4 17.c4 Bf2 18.Qc3 Be1 19.Qg7# 1–0. GammaChess – ogidodo, internet, 2007.

5.Nf3 Nbd7 6.0–0 c5 7.d3 d4 (7...0–0 8.Nbd2–/+) 8.e3 e5 9.ed4 cd4 10.Nbd2 (10.Ba3 Ba3 11.Na3+=) 10...Qa5 (better is 10...0–0!?–/+) 11.Nc4= Qc5 12.a3 Bc3 13.Bc3 dc3 14.Nfe5 0–0 15.d4 Qc7 16.Rb1 Rb8 17.Rb3 b5 18.Nd7 Bd7 19.Ne5 (19.Ne3 Rfc8=) 19...Be6+= 20.Rb1 Nd5 21.Re1 Rb6 22.Qh5 f6 (22...Nf6!? 23.Qe2 Rd8=) 23.Nd3 (better is 23.Bd5 fe5 24.Be4+/–) 23...Rd8?? (better is 23...Qf7 24.Qf3 Rd8+=) 24.Bd5 Bd5 (24...Bf7+–) 25.Re8 Re8 26.Qe8 1–0. alexp (2320) – ramesis (2135), net–chess.com, 2013.

3.g3 Bg4

4.Bg2 c6 5.d3 Nbd7 (5...e6 6.a3 a5 7.h3 Bf5 8.g4 Bg6 9.c3 Nbd7 10.Nf3 Bd6; 5...a5 6.ba5 Nbd7 7.Nf3 Qa5 8.Nbd2 e6 9.0–0 Bd6 10.a4 0–0; 5...Qd6 6.Nf3 Nbd7 7.Nbd2 Qb4 8.Rb1 Qa4 9.h3 Bh5 10.g4 Bg6; 5...Qb6 6.Nf3 Qb4 7.Bc3 Qc5 8.Bd4 Qd6 9.Nbd2 Nbd7 10.0–0 e5) 6.Nf3 Qb6 (6...e6 7.a3 a5 8.b5 Qb6 9.Nc3 cb5 10.0–0 Be7) 7.a3 (7.Nbd2 e5 8.Ne5 Bb4 9.Rb1 0–0 10.Nd7 Nd7) 7...a5 (7...e6 8.Nbd2 Bf3 9.Bf3 Bd6 10.c4 Ne5) 8.Nbd2 Bf3 (8...e6 9.0–0 Be7 10.Bd4 Qd8) 9.Bf3 e5 (9...e6 10.Bc3 a4) 10.c3 (10.Bc3 a4) 10...Bd6 (10...h5=) 11.0–0 0–0 12.Qb3 Rfe8 13.e4 d4 (better is 13...ab4!? 14.ab4 Qb5=) 14.Nc4+/– Qc7 15.Na5 c5 16.Nc4 b5 17.Nd6 Qd6 18.Be2 h5 19.cd4 cd4 20.h4 (20.Rfc1!? Nb6+/–) 20...Nb6 21.Rac1 Rec8 22.Kg2 Na4 23.f4 Nb2 24.Qb2 Ng4 25.Bg4 hg4 26.fe5 Qe5 27.Rf5 Qd6 28.Rd5 Qe6 29.Rf1 Rc3+= 30.Rd4 Rd3 31.Rd3+= Qe4 32.Rdf3 gf3 33.Kh2?? Qd3 34.Rf2 Ra3 35.Rd2 Rb3 36.Qc1? Qg6 37.Qc5 f2 38.Qf2 Rb4 39.Qc5 Rb1 40.Qe5 b4 41.h5 Qe6 42.Rd8 Kh7 43.Qe6 fe6 44.Re8 Re1 45.Rb8 Re4 46.Kg2 Kh6 47.Kf3 Rc4 48.Rb6? Kh5–+ 49.Re6 Kg5 50.Re5–/+ Kf6 51.Rb5 Rc3 52.Kf4 g5!–+ 53.Kg4 Rc4 54.Kh5? g4–+ 55.Rb6? Ke5 56.Rb5 Kd6 57.Rb8 Re4 58.Rc8?? Kd5 59.Kg5 Kd4 60.Kf5 Kd3 61.Rd8 Rd4 62.Rb8 Kc3 63.Ke5 Rc4 64.Kd5 b3 65.Rb7 Ra4 66.Rc7 Kb2 67.Kc5 Re4 68.Kd5 Re3 69.Kd4 Rg3 70.Rb7 Ka2 71.Ra7 Kb1 72.Ra3 Kb2 73.Ra8 Rc3 74.Rg8 Rc2 75.Rg4 Kb1 76.Kd3 Rc1 77.Rb4 b2 78.Kd2 Rc7 79.Rd4 Ra7 80.Rb4 Ra3 81.Rb8 Ra2 82.Kd1 Ka1 (82...Ka1 83.Ke2 b1Q 84.Ke3 Qb8 85.Kf3 Qe5 86.Kg4 Ra3 87.Kh4 Qg7 88.Kh5 Rh3) 0–1. Zhak,B (1980) – Belikov,Roman, Chigorin Mem Open, St Petersburg RUS, 2009.

4.Bg2 e6

5.a3 c5 6.bc5 Bc5 7.d4 Bb6 8.Qd3 Nc6 9.Nf3 0–0 10.0–0 Ne4 11.Nbd2 Bf5 12.Qe3 e5 13.c3 Re8 14.Ne4 Be4 15.Qd2 ed4 16.cd4 Qf6 17.Rfd1 Rac8 (17...Na5 18.Qb4–/+) 18.Rac1+= Na5 19.Qb4 Rc1 20.Bc1 Nc4 21.a4 (21.Bf4 a5 22.Qb3 Rc8=) 21...a5 (better is 21...Bc2!? 22.Re1 Qc6–/+) 22.Qb3+= Bf3 23.Bf3 Bd4 24.Qb7 Ne5 25.Kg2 Nf3 26.ef3 h6 27.Qd5 Bc3 28.Be3 Qe5 29.Bb6 Re6 30.Qa8 Kh7 31.Rd5 Re8 32.Qc6 Qe1 33.Ba5! Ba5 34.Ra5! Re2 (34...Qa5 35.Qb5 Double attack (35.Qe8 Deflection; 35.Qb5 Decoy; 35.Qe8 Overloading)) 35.Qc5 g6? (better is 35...Rf2 36.Qf2 Qa5+–) 36.Ra7 Kg7 37.Qd4 (37.Qd4 Kg8 38.a5+–) 1–0. donex7 (1810) – toffie62 (1805), gameknot.com, 2014.

5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Nbd7 9.Nf3 Bd6 10.0–0 Qa8 (10...0–0 11.Nc3+=) 11.Nc3+= Qa5 12.Nd4 (12.Bb2 0–0+=) 12...Qb4 13.Nb3 (13.h3 Bh5 (worse is 13...Qd4 14.Nd5 Qc5 15.Nf6 Nf6 16.Bf6 gf6 17.hg4+=) 14.Na2 Qa3+=) 13...0–0–/+ 14.Bb2 (14.d3 Ra8–/+) 14...Nc5 15.d3 (15.h3 Bf5–/+) 15...Ra8 16.h3 (16.f3 Nb3 17.cb3 Bh5–+) 16...Bh5–+ 17.g4?? (better is 17.Qd2–+) 17...Qf4 (17...Qf4 18.f3 Qh2 19.Kf2 Bg3 20.Ke3 Nb3 21.cb3 Bf4 22.Kd4 Be5 23.Ke3 d4 24.Kd2 dc3 25.Kc2 Nd5–+) 0–1. UncleBulgaria – marekt, ChessWorld.net, 2015.

5.b5 Nbd7 6.h3 Bf5 7.Nf3 h6 8.0–0 Bc5 9.d3 (9.d4 Be7+=) 9...a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 0–0 13.Nbd2 Qe7 14.c4 Ra8 15.Qc2 Bb6 (15...Bg6 16.Bb2+=) 16.cd5= ed5 (16...Nd5? 17.e4+–) 17.Nb3 Nf8 18.Bd4 Bd7 19.Bb6 cb6 20.Nbd4 Ne6 21.Qb2 (21.Nf5 Qd8=) 21...Qa3 22.Rb1 Qb2 23.Rb2 Ra4 24.Ne6 Be6 25.Nd2 (25.Kh2 Kf8=) 25...g5 26.Nf1 Kf8 27.Ne3 Ke7 28.Nc2 Kd6 29.e3 Bf5 30.Bf1 Nd7 31.Nd4 Bg6 32.Rb3 Nc5 33.Rc3 Ra1 34.Kg2 Rd1 Will d3 fall? 35.g4 Ra1 (35...Bh7+=) 36.f4 (better is 36.f3!?=) 36...gf4–/+ 37.ef4 Ra4 38.f5 Rd4 39.fg6 fg6 40.Kf3 (40.Ra3 Na4–/+) 40...Ke5–+ 41.Ke3 (41.Rc1 Nd3 42.Rc8 Rf4 43.Kg2 Ne1 44.Kg1 Nf3 45.Kg2 Ng5–+) 41...Rb4 Black prepares d4 42.Ra3 d4 43.Kf2 (43.Kf3 Rb5 44.Ra8 Rb1–+) 43...Kf4 44.Ra8?! (44.Be2 Rb5 45.Ra8 Rb2 46.Rf8 Ke5 47.Re8 Ne6–+) 44...Rb2 (44...Rb5?! 45.Rf8 Ke5 46.Re8 Kf6 47.Rf8 Kg7 48.Rd8–+) 45.Ke1 Kg3 0–1. towa (1915) – marekt (2045), gameknot.com, 2014.

5.c4 Bb4 6.Qa4 (6.Qb3!? Nc6 7.a3+=) 6...Nc6–/+ 7.cd5 ed5 8.a3 Bc5 9.Qb5 Qd6 10.d4 Bb6 11.e3 Ne4 12.Nc3 Ba5 13.Nge2?? (better is 13.Qb3–+) 13...Be2 14.Ke2 Bc3 (14...Nc3?! 15.Bc3 Bc3 16.Rac1 Qa3 17.Qb7–+) 15.Rab1 Bb2 16.Qb2 0–0 17.Qb7 (17.Rhc1–+) 17...Rab8 (17...Rab8 18.Be4 de4 19.Qb8 Rb8 20.Rb8 Nb8–+) 0–1. ulla (1715) – marekt (2010), gameknot.com, 2014.

5.c4 Bb4 6.cd5 ed5 7.Qb3 Nc6 8.a3 Bc5 9.Qb7 Nd4 10.Bd4 Bd4 11.Nc3 Rb8 12.Qc6 Bd7 13.Qa6 Ng4 14.e3 Bc3 15.dc3 Rb6 16.Qe2 (16.Qa7?? Qf6 17.Bf3 Qc3 18.Kf1 Qa1 19.Kg2 Qb2 20.Bg4 Bg4 21.Qa8 Rb8 22.Qc6 Bd7 23.Qd5 Qf6 24.Qe4 Qe7–+) 16...Qb8 17.Rd1?? (better is 17.Qd1 Rb2 18.Nh3 Ne3 19.fe3 Rg2 20.Nf4+=) 17...Rb2–+ 18.Rd2 Rb1 19.Rd1 Ba4 20.Rb1 (20.Qg4 Rd1 21.Qd1 Bd1 22.Kd1 Qb3 23.Kd2 Qa3 24.Ne2–+) 20...Qb1 21.Kd2 Qc2 22.Ke1 Qc1 0–1. nextdoor (1680) – marekt (2030), gameknot.com, 2014.

5.Nf3 Bb4 6.Ne5 Bf5 7.c4 c6 8.Qb3 Qb6 9.e3 (9.0–0 0–0–/+) 9...Na6 (9...0–0 10.0–0–/+) 10.Bd4–/+ Nc5 11.Qb2? (11.Qd1 dc4 12.0–0 Qa6–/+) 11...0–0?? (11...Ng4 12.Bc5 Bc5 13.Qb6 ab6 14.Ng4 Bg4 15.f3–+) 12.Nc3? (12.0–0 Na4 13.Qb3 c5–/+) 12...dc4 (12...Nfd7 13.Bf1 Ne5 14.Be5 dc4 15.Bc4–+) 13.Bf1 (13.a3 Ba5 14.Qa2 Bc3 15.dc3–+) 13...Bc3 (better is 13...Nd5 14.Nc4 Bc3 15.Qc3 Nc3 16.Nb6 ab6 17.Bc3 Be4–+) 14.Qc3+= Na4 (better is 14...Qc7!? 15.Bc5 Ne4 16.Qc4 Qe5+=) 15.Bb6+= Nc3 16.Bc5 Rfd8 (better is 16...Ncd5!? 17.Bf8 Rf8 18.Bc4 Ng4 19.Ng4 Bg4+/–) 17.dc3+/– Rd5 18.Bd4 c5 19.Bc4 cd4 20.Bd5 Nd5 21.cd4 f6 22.Nc4 b5 23.Nd6+– b4? 24.Nf5 ef5 25.Kd2 Nc3 26.f3 Na4 27.Rhc1 a5 28.Rc4 Rb8 29.a3 Nb6 30.Rc5 b3 31.Rb1 a4 32.Kc3 Re8 33.Re1 Kf7 34.Rf5 Ke6 35.e4 Rb8 36.Re2 Nd7 37.Ra5 Rc8 38.Kb2 Nb6 39.Ra6 Rb8 40.Re1 f5 41.Rc1 Kd6 42.Rc5 fe4 43.fe4 g6 44.e5 Kd7 45.Ra7 Ke6 46.Rh7 Nd5 47.Rg7 Ne3 48.Rg6 Kf5 49.Rf6 Ke4 50.Rf4 Kd3 51.Rc3 Ke2 52.Re4 1–0. Leon Manas,Jose Francisco (1715) – Ramirez Medina,Oscar (1905), Torneo de Ajedrez Dia Universa, 2009.

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  • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
  • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
  • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
  • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
  • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

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